Discussion:
Another Native-Java-DSL for the Cypher Language
Wolfgang Schuetzelhofer
2014-05-16 13:55:28 UTC
Permalink
Hello everyone,

I am new to this group and I have been working with Neo4j for a few months
now.
In this time, out of interest, I have started writing a 'Native Java DSL'
(Domain Specific Language) for the Cypher language. You may ask: 'Why yet
another one?'.
Well, the main focus of this work is to provide a 'really' fluent Java API
to intuitively write and read Java-Cypher expressions.
Almost all API methods either take zero or only one parameter. This makes
concatenating methods, thus formulating language expressions really fluent
and well supported by completion proposals, which are provided out

of the box by all major Java IDEs. Besides, we have not stopped developing
IDEs or other tools after the first of their kind was available.

I have made my code available on GitHub, together with some documentation.
You can find the documentation wiki here:
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki.
From the wiki, in the chapter 'Getting Started' you are linked to the Git
repository and to the releases page.
Please have a look.

Additionaly I have started to develop a plugin for the Eclipse IDE. It
provides some additional support for creating and editing Java-Cypher
expressions, currently by extending completion proposals.
This one is also available on GitHub, again the documentation wiki is a
good starting point (linking to the repository and the releases):
https://github.com/Wolfgang-Schuetzelhofer/jcypher_eclipse/wiki.

I really would appreciate if (hopefully many of) you could have a look at
the projects, play around and experiment with the code, and give me some
feedback.

Currently the code supports the fluent Java-Cypher API and a mapping to
Cypher expressions. Development of a JSON mapping, access to Neo4j
databases via REST, and of a query result model is on the way.
I know that right now the usefulness of the code is quite limited, because
important features like access to databases and an appropriate result model
and API are still missing.
Nevertheless I think it is important to provide access and to gather
feedback as early as possible.

Looking forward to hearing from you,
best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-05-26 10:50:52 UTC
Permalink
Hello everyone,

Release 0.2.0 of the Java DSL for Cypher (JCypher) is available.
Implementation of expressions and their mapping to Cypher is completed.
Please have a look at:
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2FWolfgang-Schuetzelhofer%2Fjcypher%2Fwiki&sa=D&sntz=1&usg=AFQjCNE3XqYAWHGMAxrZ6E4AT7hSZEay5Q>
.
From there you are linked to the code.

The upcoming Release 0.3.0 will have added a mapper to JSON including automatic
extraction of parameters (literals are automatically detected and wherever
possible replaced with parameters in order to speed up queries in repeated
scenarios).

Best regards,
Wolfgang Schuetzelhofer
Post by Wolfgang Schuetzelhofer
Hello everyone,
I am new to this group and I have been working with Neo4j for a few months
now.
In this time, out of interest, I have started writing a 'Native Java DSL'
(Domain Specific Language) for the Cypher language. You may ask: 'Why yet
another one?'.
Well, the main focus of this work is to provide a 'really' fluent Java API
to intuitively write and read Java-Cypher expressions.
Almost all API methods either take zero or only one parameter. This makes
concatenating methods, thus formulating language expressions really fluent
and well supported by completion proposals, which are provided out
of the box by all major Java IDEs. Besides, we have not stopped developing
IDEs or other tools after the first of their kind was available.
I have made my code available on GitHub, together with some documentation.
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2FWolfgang-Schuetzelhofer%2Fjcypher%2Fwiki&sa=D&sntz=1&usg=AFQjCNE3XqYAWHGMAxrZ6E4AT7hSZEay5Q>
.
From the wiki, in the chapter 'Getting Started' you are linked to the Git
repository and to the releases page.
Please have a look.
Additionaly I have started to develop a plugin for the Eclipse IDE. It
provides some additional support for creating and editing Java-Cypher
expressions, currently by extending completion proposals.
This one is also available on GitHub, again the documentation wiki is a
https://github.com/Wolfgang-Schuetzelhofer/jcypher_eclipse/wiki.
I really would appreciate if (hopefully many of) you could have a look at
the projects, play around and experiment with the code, and give me some
feedback.
Currently the code supports the fluent Java-Cypher API and a mapping to
Cypher expressions. Development of a JSON mapping, access to Neo4j
databases via REST, and of a query result model is on the way.
I know that right now the usefulness of the code is quite limited, because
important features like access to databases and an appropriate result model
and API are still missing.
Nevertheless I think it is important to provide access and to gather
feedback as early as possible.
Looking forward to hearing from you,
best regards,
Wolfgang Schuetzelhofer
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Jim Salmons
2014-05-27 15:48:40 UTC
Permalink
Hi Wolfgang,

So many folks are so busy at the moment and with the U.S. Memorial Day
holiday, our thoughts have been elsewhere, but all that said, this effort
of yours is AWESOME and welcome -- not only is it a great example of "learn
by scratching your itch," but you are doing something that has such
potential value to others.

And as to having "yet another" Java Native Cypher DSL, the more the merrier
because the best ideas from each will affect the others and everyone
benefits. Ultimately, there may be a "winner" in terms of most-used, but
that only means so much in a "one size does not fit all" world.

I also appreciate that you are taking the extra effort to document and
communicate your design intent, etc.

Finally, if I have a wish list -- and I have not yet had a chance to
explore your work so I am speaking purely from personal preference -- while
an Eclipse plug-in is great, it sure would be "also great" to include an
IntelliJ Community Edition plug-in (http://plugins.jetbrains.com/?idea_ce).

Happy-Healthy Vibes,
--Jim--
Post by Wolfgang Schuetzelhofer
Hello everyone,
Release 0.2.0 of the Java DSL for Cypher (JCypher) is available.
Implementation of expressions and their mapping to Cypher is completed.
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2FWolfgang-Schuetzelhofer%2Fjcypher%2Fwiki&sa=D&sntz=1&usg=AFQjCNE3XqYAWHGMAxrZ6E4AT7hSZEay5Q>
.
From there you are linked to the code.
The upcoming Release 0.3.0 will have added a mapper to JSON including automatic
extraction of parameters (literals are automatically detected and wherever
possible replaced with parameters in order to speed up queries in repeated
scenarios).
Best regards,
Wolfgang Schuetzelhofer
Post by Wolfgang Schuetzelhofer
Hello everyone,
I am new to this group and I have been working with Neo4j for a few
months now.
In this time, out of interest, I have started writing a 'Native Java DSL'
(Domain Specific Language) for the Cypher language. You may ask: 'Why yet
another one?'.
Well, the main focus of this work is to provide a 'really' fluent Java
API to intuitively write and read Java-Cypher expressions.
Almost all API methods either take zero or only one parameter. This makes
concatenating methods, thus formulating language expressions really fluent
and well supported by completion proposals, which are provided out
of the box by all major Java IDEs. Besides, we have not stopped
developing IDEs or other tools after the first of their kind was available.
I have made my code available on GitHub, together with some
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2FWolfgang-Schuetzelhofer%2Fjcypher%2Fwiki&sa=D&sntz=1&usg=AFQjCNE3XqYAWHGMAxrZ6E4AT7hSZEay5Q>
.
From the wiki, in the chapter 'Getting Started' you are linked to the Git
repository and to the releases page.
Please have a look.
Additionaly I have started to develop a plugin for the Eclipse IDE. It
provides some additional support for creating and editing Java-Cypher
expressions, currently by extending completion proposals.
This one is also available on GitHub, again the documentation wiki is a
https://github.com/Wolfgang-Schuetzelhofer/jcypher_eclipse/wiki.
I really would appreciate if (hopefully many of) you could have a look at
the projects, play around and experiment with the code, and give me some
feedback.
Currently the code supports the fluent Java-Cypher API and a mapping to
Cypher expressions. Development of a JSON mapping, access to Neo4j
databases via REST, and of a query result model is on the way.
I know that right now the usefulness of the code is quite limited,
because important features like access to databases and an appropriate
result model and API are still missing.
Nevertheless I think it is important to provide access and to gather
feedback as early as possible.
Looking forward to hearing from you,
best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-05-28 08:39:04 UTC
Permalink
Hi Jim,

thanks for your interest and for your reply.
My main focus currently is on the DSL, which should reach a really useful
state with the Milestone Release 1.0.0. Please have a look at:
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/P5%20Outlook%20(Roadmap)

After that, for a next Milestone, I intent to direct development towards
providing access to graph databases at a 'higher level of abstraction' (not
just at the level of nodes and relations, ...).
Ideas are currently evolving.

I must admit, that I am not doing much work on the Eclipse pLug-in at the
moment (one reaseon is lack of time as I am working on other projects too
(to earn some money)).
But the plug-in will evolve over time and if it should prove useful one
could also think about an IntelliJ plug-in (though I don't currently have
enough experience with IntelliJ).

best regards, hoping to stay in contact,
Wolfgang
Post by Jim Salmons
Hi Wolfgang,
So many folks are so busy at the moment and with the U.S. Memorial Day
holiday, our thoughts have been elsewhere, but all that said, this effort
of yours is AWESOME and welcome -- not only is it a great example of "learn
by scratching your itch," but you are doing something that has such
potential value to others.
And as to having "yet another" Java Native Cypher DSL, the more the
merrier because the best ideas from each will affect the others and
everyone benefits. Ultimately, there may be a "winner" in terms of
most-used, but that only means so much in a "one size does not fit all"
world.
I also appreciate that you are taking the extra effort to document and
communicate your design intent, etc.
Finally, if I have a wish list -- and I have not yet had a chance to
explore your work so I am speaking purely from personal preference -- while
an Eclipse plug-in is great, it sure would be "also great" to include an
IntelliJ Community Edition plug-in (http://plugins.jetbrains.com/?idea_ce
).
Happy-Healthy Vibes,
--Jim--
Post by Wolfgang Schuetzelhofer
Hello everyone,
Release 0.2.0 of the Java DSL for Cypher (JCypher) is available.
Implementation of expressions and their mapping to Cypher is completed.
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2FWolfgang-Schuetzelhofer%2Fjcypher%2Fwiki&sa=D&sntz=1&usg=AFQjCNE3XqYAWHGMAxrZ6E4AT7hSZEay5Q>
.
From there you are linked to the code.
The upcoming Release 0.3.0 will have added a mapper to JSON including automatic
extraction of parameters (literals are automatically detected and wherever
possible replaced with parameters in order to speed up queries in repeated
scenarios).
Best regards,
Wolfgang Schuetzelhofer
Post by Wolfgang Schuetzelhofer
Hello everyone,
I am new to this group and I have been working with Neo4j for a few
months now.
In this time, out of interest, I have started writing a 'Native Java
DSL' (Domain Specific Language) for the Cypher language. You may ask: 'Why
yet another one?'.
Well, the main focus of this work is to provide a 'really' fluent Java
API to intuitively write and read Java-Cypher expressions.
Almost all API methods either take zero or only one parameter. This
makes concatenating methods, thus formulating language expressions really
fluent and well supported by completion proposals, which are provided out
of the box by all major Java IDEs. Besides, we have not stopped
developing IDEs or other tools after the first of their kind was available.
I have made my code available on GitHub, together with some
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki<https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2FWolfgang-Schuetzelhofer%2Fjcypher%2Fwiki&sa=D&sntz=1&usg=AFQjCNE3XqYAWHGMAxrZ6E4AT7hSZEay5Q>
.
From the wiki, in the chapter 'Getting Started' you are linked to the
Git repository and to the releases page.
Please have a look.
Additionaly I have started to develop a plugin for the Eclipse IDE. It
provides some additional support for creating and editing Java-Cypher
expressions, currently by extending completion proposals.
This one is also available on GitHub, again the documentation wiki is a
https://github.com/Wolfgang-Schuetzelhofer/jcypher_eclipse/wiki.
I really would appreciate if (hopefully many of) you could have a look
at the projects, play around and experiment with the code, and give me some
feedback.
Currently the code supports the fluent Java-Cypher API and a mapping to
Cypher expressions. Development of a JSON mapping, access to Neo4j
databases via REST, and of a query result model is on the way.
I know that right now the usefulness of the code is quite limited,
because important features like access to databases and an appropriate
result model and API are still missing.
Nevertheless I think it is important to provide access and to gather
feedback as early as possible.
Looking forward to hearing from you,
best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-06-02 09:30:25 UTC
Permalink
Hello everyone,

Release 0.3.0 of the Java DSL for Cypher (JCypher) is available.
Added to this release now is a Mapper to JSON.
It also includes automatic extraction of parameters (literals are
automatically detected and wherever possible replaced with parameters in
order to speed up queries in repeated scenarios)
Please have a look at:
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki.
From there you are linked to the code.

The upcoming Release 0.4.0 will have added access to Neo4j Databases
(finally the JCypher queries we have constructed so far can be executed
against a graph database).

Best regards,
Wolfgang Schuetzelhofer
--
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Peter Neubauer
2014-06-02 09:39:57 UTC
Permalink
Very cool Wolfgang,
Looks really cool!

/peter

(snt)-[:frm]->(phn)
On Jun 2, 2014 11:30 AM, "Wolfgang Schuetzelhofer" <
Post by Wolfgang Schuetzelhofer
Hello everyone,
Release 0.3.0 of the Java DSL for Cypher (JCypher) is available.
Added to this release now is a Mapper to JSON.
It also includes automatic extraction of parameters (literals are
automatically detected and wherever possible replaced with parameters in
order to speed up queries in repeated scenarios)
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki.
From there you are linked to the code.
The upcoming Release 0.4.0 will have added access to Neo4j Databases
(finally the JCypher queries we have constructed so far can be executed
against a graph database).
Best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-06-02 15:42:55 UTC
Permalink
Hi Peter,

thanks for your interest.

best regards,
Wolfgang
Post by Peter Neubauer
Very cool Wolfgang,
Looks really cool!
/peter
(snt)-[:frm]->(phn)
Post by Wolfgang Schuetzelhofer
Hello everyone,
Release 0.3.0 of the Java DSL for Cypher (JCypher) is available.
Added to this release now is a Mapper to JSON.
It also includes automatic extraction of parameters (literals are
automatically detected and wherever possible replaced with parameters in
order to speed up queries in repeated scenarios)
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki.
From there you are linked to the code.
The upcoming Release 0.4.0 will have added access to Neo4j Databases
(finally the JCypher queries we have constructed so far can be executed
against a graph database).
Best regards,
Wolfgang Schuetzelhofer
--
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Wolfgang Schuetzelhofer
2014-06-11 17:01:32 UTC
Permalink
Hello everyone,

while working on the upcoming release 0.4.0 of *JCypher*, which is planned
for 20.06.2014, I have added a new section called Future Zone
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/P6-Future-Zone> to
the documentation wiki
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki> at GitHub.
This section aims to serve as an incubator for new ideas as they evolve
over time.
Ideas about future development directions of JCypher, as well as general
ideas about graph databases and how they might influence the way we
architect, design, and implement our applications in the future.

I very much would appreciate if you had a look at this section (it will be
edited on e regular basis), provide comments, and get involved in a
discussion.

Best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-06-16 15:15:57 UTC
Permalink
Hello everyone,

*Release 0.4.0 of JCypher (a 'Native Java DSL' for Cypher) is available.*
Please have a look at:
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki.
From there you are linked to the code.

New in this release: Access to Neo4j databases (finally the JCypher queries
we have constructed so far can be executed against a graph database).
You can access Neo4j databases in a uniform way, no matter if you access a
remote database, an embedded database, or an in-memory database.

Feature overview:
- Fluent API to formulate JCypher expressions.
- Mapper from JCypher to Cypher.
- Mapper to JSON.
- Access to Neo4j databases.

The upcoming Release 1.0.0 will have added a result model and API to easily
and comfortably operate on query results.
Additionally, JCypher will be partitioned into three projects. A JCypher
main project and two sub-projects. The two sub-projects will contain
classes and dependencies for accessing remote databases on the one hand and
for accessing embedded and in-memory databases on the other hand. This will
enable to import only those classes and dependencies which are needed for a
specific type of database access.


Best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-07-03 13:12:33 UTC
Permalink
Hello everyone,

The scope of JCypher has been expanded !!!
Based on ideas outlined on the *Future Zone* page of the dokumentation wiki
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>, the content for
a *JCypher Release 2.0.0* has been roughly scoped.
This expands the overall scope and goals for JCypher. Please have a look at
the dokumentation wiki
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>.
Note: This will not affect the upcoming *Release 1.0.0*.

Best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-07-28 11:41:16 UTC
Permalink
Hello everyone,

I am sorry to announce that Release 1.0.0 of JCypher will be delayed by two
weeks.
So the new release date will be *11.08.2014*.
The delay is due to vacation and to some urgent work on other projects.
I don't want to sacrifice quality of code or feature completeness in order
to hold a planned release date, All the more as the delay is relatively
short.
Therefore I have decided to postpone the release date by two weeks.

Best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-08-11 13:59:24 UTC
Permalink
Hello everyone,

*Release 1.0.0 of JCypher is available.*
Please have a look at:
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki.
From there you are linked to the code.

New in this release: A graph model as result model of queries. The model
can easily be navigated and modified.
Modifications, including newly created nodes and relations can be applied
to the underlying database.

Feature overview:
- Fluent API to formulate JCypher expressions.
- Mapper from JCypher to Cypher.
- Mapper to JSON.
- Access to Neo4j databases.
- Graph model as query result model

Best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-08-28 10:50:37 UTC
Permalink
Hello everyone,

*JCypher is now on Maven Central !*
JCypher binaries and sources are now available on *maven central *(
http://search.maven.org/, search for '*jcypher*').
You can simply add the dependencies to JCypher to your project's *pom.xml* (in
case you build your project with maven).

To reduce dependencies (if you don't need *remote* and *embedded* and
*in_memory* database access at the same time, you won't need all implicitly
imported dependencies)
please have a look at:
https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/P6-Dependencies.

The scope for JCypher release 1.1.0, upcoming in 09.2014 is now clearly
defined.
Please have a look
at: https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/P7-Outlook-(Roadmap)

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-09-23 12:07:40 UTC
Permalink
Hello everyone,

The JCypher documentation wiki has been recently updated. Please have a
look at: https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki.
The pages: 'Home', 'Outlook (Roadmap)', 'Future Zone', and 'Future Zone
Continued' have modified and extended content.

The release date of JCypher 1.1.0 will be second half of October. Release
1.1.0 will provide a default generic mapping of complex
Java object graphs to Neo4J graph databases. No additional configuration is
needed, you can store and retrieve Java object graphs in a straight forward
way.
The code for the release is mostly there, except for some minor
refactorings, some enhancements in mapping lists and maps, some additional
unit tests,
and a hopefully illustrative example.
I will not be in the office from end of September to mid of October, hence
the new release date.

On the pages 'Outlook (Roadmap)' and 'Future Zone Continued' of the
documentation wiki: https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki,
you will find information about the contents of the next release of
JCypher: 1.2.0.

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-10-31 12:35:30 UTC
Permalink
Hello everyone,

The *release naming strategy* for *JCypher* has now been defined more
precisely.

Format: *n1.n2.n3*
With n1, n2, n3 integer values such that: n1 ... major release number, n2
... minor release number, n3 ... fix release number.
*n1* changes when new major features are added.
*n2* changes when existing features are enhanced or minor features are
added.
*n3* changes when problem- or bug fixes are added.

So the next release will now be *2.0.0*, as a major feature, mapping of
complex business domains to Neo4J graphs, is added.
*Release 2.0.0* is now finally scheduled for *monday, 17.11.2014*.

The reason for the delay is me having simply underestimated the complexity
and the required effort to implement such a mapping and the huge number of
different scenarios you have to deal with.
But I think the result of this effort will be really useful and is a major
step in the development of JCypher.


best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-11-17 10:13:14 UTC
Permalink
Hello everyone,

*JCypher 2.0.0* is released !
Since its start as a 'Native Java DSL' (Domain Specific Language) for the
Cypher language, JCypher has undergone quite a development.

*JCypher* is now a library which provides Java access to Neo4J databases at
multiple levels of abstraction.

-

At the bottom level a 'Native Java DSL' in form of a fluent Java API
allows to intuitively and comfortably formulate queries against graph
databases. The DSL (Domain Specific Language) is based on the CYPHER
language. Hence the name JCypher. (The Cypher Language is developed as part
of the Neo4J Graph Database by 'Neo Technology'). The DSL provides all the
power and expressiveness of the Cypher language.
-

At the next level of abstraction, access to graph databases is provided
based on a generic graph model. The model consists of nodes, relations, and
paths, together with properties, labels, and types. While simple, the model
allows to easily navigate and manipulate graphs.
-

At the top level, arbitrarily complex business domains can be mapped to
graph databases in a completely non-invasive way (not even annotations
invading the business model).
-

At this level *'Domain Queries'* provide the power and expressiveness of
queries on a graph database, while being formulated on domain objects or on
types of domain objects respectively.
-

Additionally, JCypher provides database access in a uniform way to
remote as well as to embedded databases (including in-memory databases).

Release 2.0.0 includes all upper mentioned features except 'Domain
Queries'. Domain Queries are currently under development.
Release 2.1.0 will provide a first preview of 'Domain Queries', not the
fully-fledged 'Domain Query Language'.
The 'Domain Query Language' will be developed and released step by step in
the upcoming releases 2.x.

Also the documentation wiki
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki> has been heavily
restructured.
Additionally there is now a distinct samples project
<https://github.com/Wolfgang-Schuetzelhofer/jcypher_samples> for JCypher.

best regards
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-12-01 14:08:37 UTC
Permalink
Hello everybody,

I have added an architectural overview to the documentation.
Please have a look at the documentation wiki here
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>.

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2014-12-16 14:26:01 UTC
Permalink
Hi everybody,

*JCypher release 2.1.0* is now available (earlier than expected).
It contains *Domain Queries* Part 1 (Predicate Expressions). The first time
you get a look at Domain Queries and how they work.

*Note:* Domain Queries are currently under development and will be expanded
step by step over the next few releases of JCypher.
Please have a look at the *documentation wiki*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki> (from there you
are linked to the code).

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-01-23 15:04:56 UTC
Permalink
Hi everybody,

*JCypher release 2.2.0* is now available (earlier than expected).
It contains *Domain Queries* Part 2 (Predicate Expressions).

*Note:* Domain Queries are currently under development and will be expanded
step by step over the next few releases of JCypher.
Please have a look at the *documentation wiki*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki> (from there you
are linked to the code).

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-01-23 15:12:45 UTC
Permalink
Hi everybody,

I have to correct:* JCypher release 2.2.0* contains *Domain Queries* Part 2
(*Traversal* Expressions).

Details in the *documentation wiki*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>.

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-02-28 14:12:30 UTC
Permalink
Hi everybody,

*JCypher* has now a *Project Homepage* at:
*http://jcypher.iot-solutions.net/.*
Release *2.3.0* of JCypher will be delayed by approximately two weeks.
The new release date is *March 16th 2015*.

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-03-16 14:18:47 UTC
Permalink
Hi everybody,

*JCypher* *2.3.0* has been released.
Please have a look at the project homepage: *http://jcypher.iot-solutions.net/
<http://jcypher.iot-solutions.net/>.*
Or go directly to the documentation wiki
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>.

New in release 2.3.0: Domain Queries - Collection Expressions.

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-05-04 12:57:20 UTC
Permalink
Hi everybody,

*JCypher* *2.4.0* has been released.
Please have a look at the project homepage: *http://jcypher.iot-solutions.net/
<http://jcypher.iot-solutions.net/>.*
Or go directly to the documentation wiki
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>.

New in release 2.4.0: Domain Queries - Collection Expressions UNION and
INTERSECTION.
Improved support for multiple domains in a single database.

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-06-08 13:28:46 UTC
Permalink
Hi everybody,

*JCypher* *2.5.0* has been released.
Please have a look at the project homepage: *http://jcypher.iot-solutions.net/
<http://jcypher.iot-solutions.net/>.*
Or go directly to the documentation wiki
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>.

New in release 2.5.0: Domain Query Concatenation. It allows to use results
of one query as starting points in subsequent queries,
thus providing to reduce query complexity

Finally up and running is my homepage, or the homepage of my company
respectively, at: http://www.iot-solutions.net.
You are sincerely invited to visit the page.

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-07-06 13:10:34 UTC
Permalink
Hi everybody,

*JCypher* *2.6.0* has been released.
Please have a look at the project homepage: *http://jcypher.iot-solutions.net/
<http://jcypher.iot-solutions.net/>.*
Or go directly to the *documentation wiki*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>.

Release 2.6.0 works with Neo4j 2.2.2 and supports basic authentication and
authorization.

best regards,
Wolfgang Schuetzelhofer
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Tracy Michelle
2015-07-09 20:21:04 UTC
Permalink
Hi Wolfgang,

I'm a newbie to the group and Neo4j. I just wanted to say that I'm
starting to look through your docs for jcypher and I am amazed at the
amount of dedication and work in the high level architectural diagram
alone. From the heart of a newbie...thank you sooooo much for the time you
have taken to put together your documentation.

Tracy
Post by Wolfgang Schuetzelhofer
Hi everybody,
*JCypher* *2.6.0* has been released.
Please have a look at the project homepage: *http://jcypher.iot-solutions.net/
<http://jcypher.iot-solutions.net/>.*
Or go directly to the *documentation wiki*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>.
Release 2.6.0 works with Neo4j 2.2.2 and supports basic authentication and
authorization.
best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-07-10 07:16:44 UTC
Permalink
Hi Tracy,
I'm glad that you take a look at jcypher. If you need any help or
additional information, please don't hesitate to contact me.
During the next two weeks my answer might take some time because I'm on a
sailing trip in the mediterranean.

best regards,
Wolfgang

On Thu, Jul 9, 2015 at 10:21 PM, Tracy Michelle <
Post by Jim Salmons
Hi Wolfgang,
I'm a newbie to the group and Neo4j. I just wanted to say that I'm
starting to look through your docs for jcypher and I am amazed at the
amount of dedication and work in the high level architectural diagram
alone. From the heart of a newbie...thank you sooooo much for the time you
have taken to put together your documentation.
Tracy
Post by Wolfgang Schuetzelhofer
Hi everybody,
*JCypher* *2.6.0* has been released.
Please have a look at the project homepage: *http://jcypher.iot-solutions.net/
<http://jcypher.iot-solutions.net/>.*
Or go directly to the *documentation wiki*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>.
Release 2.6.0 works with Neo4j 2.2.2 and supports basic authentication
and authorization.
best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-08-24 15:45:41 UTC
Permalink
Hi everybody,

*JCypher* *2.7.0* has been released.
New in this release is a *transaction API.*
A distinct page in the wiki documents the usage of the API
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/P08-Transactions>.

In addition,
please have a look at the project homepage: *http://jcypher.iot-solutions.net/
<http://jcypher.iot-solutions.net/>.*
Or go directly to the *documentation wiki*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>.

Release 2.7.0 works with Neo4j 2.2.2 and supports basic authentication and
authorization.

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-09-29 11:14:40 UTC
Permalink
Hi everybody,

*JCypher* *2.7.1* containing some fixes has been released.
You can find details in the *release notes*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>
Please also have a look at the project homepage: *http://jcypher.iot-solutions.net/
<http://jcypher.iot-solutions.net/>.*
Or go directly to the *documentation wiki*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki>.

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-10-23 10:13:41 UTC
Permalink
Hi everybody,

*JCypher* *3.0.0* has been released. Please be patient, it may take a
couple of hours until the release is visible on maven central.
*New* in this release is a *Generic Domain Model*, allowing you to work
with a Domain Graph even if you don't have the appropriate Java Model
Classes at hand (on your classpath).
You find details in the documentation at *Generic Domain Model
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/P08-Generic-Domain-Model>.*

In addition the documentation now has a distinct *Table of Contents*
<http://www.iot-solutions.net/jcypher/toc.html>

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-11-30 16:47:03 UTC
Permalink
Hi everybody,

Sorry, but* JCypher* *3.1.0* is delayed. JCypher 3.1.0 will provide
concurrency support, a big step towards industrial strength.
As it turned out, providing sound and stable concurrency support takes more
effort than initially estimated. This, together with work
I have to do on other projects, leads to the aforementioned delay.
*JCypher* *3.1.0* will be released by end of December this year (a delay of
approximately one month).

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2015-12-30 16:23:28 UTC
Permalink
Hi everybody,

*JCypher* *3.1.0* has been released.
*New* in this release is concurrency support by means of optimistic locking.
You find details in the documentation at *Concurrency Support
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/P10%20Concurrency%20Support>.*

You may start at JCypher's *Project Home Page*
<http://jcypher.iot-solutions.net/>

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2016-01-29 10:23:41 UTC
Permalink
Hi everybody,

*JCypher* *3.2.0* has been released.
To see what's new in this release, please have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
For a complete overview you may start at JCypher's *Project Home Page*
<http://jcypher.iot-solutions.net/>

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2016-02-01 12:42:38 UTC
Permalink
Hi everybody,

here are some additional infos about *JCypher release* *3.2.0*:

New in this release:

- Concurrency support - thread-safe invocation of 'IDomainAccess' and
domain queries.
- Query DSL and Domain Query - String Operators: STARTS_WITH, CONTAINS
(CONTAINS_string), ENDS_WITH
- Query DSL - Support for Literal Maps
- Upgrade to Neo4j 2.3.1

You may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release, please have a
look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/P12-Outlook-(Roadmap)>
.
There is also a page outlining ideas for future development directions of
JCypher: *Future Zone* <http://jcypher.iot-solutions.net/future_zone.html>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2016-03-23 15:12:22 UTC
Permalink
Hi everybody,

*JCypher* *3.3.0 *has been released.

New in this release:

- Query DSL - DETACH DELETE now supported.
- JSON Facade in preparation to access JCypher from other, possibly
remote, systems.

Release cycles have slowed down a bit, this is because I am working on a
new project *'JCypher-Server'* in parallel.
JCypher-Server will provide a server-side implementation of JCypher,
offering RESTful services and a browser based web UI.
The web UI will allow to explore domain models, domain graphs, and it will
support creation and execution of domain queries.
All in an intuitive and graphical way.
New requirements for JCypher are currently mainly driven by this new
project 'JCypher-Server'.
I expect a first preview release of *JCypher-Server*, with a limited (far
from complete) set of features, to be published sometimes in April this
year.
JCypher-Server is beginning to look really interesting, please stay tuned.

For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/P12-Outlook-(Roadmap)>
.
There is also a page outlining ideas for future development directions of
JCypher: *Future Zone* <http://jcypher.iot-solutions.net/future_zone.html>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2016-04-04 10:40:48 UTC
Permalink
Hi everybody,

*JCypher* *3.3.1 *has been released. This is a fixes release

Fixed in this release:

-
- Illegal use of parameter-sets with MERGE, now using simple parameters.
- Added support for all Collection sub classes in domain model.

For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/P12-Outlook-(Roadmap)>
.
There is also a page outlining ideas for future development directions of
JCypher: *Future Zone* <http://jcypher.iot-solutions.net/future_zone.html>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2016-05-30 11:39:28 UTC
Permalink
Hi everybody,

*JCypher* *3.4.0 *has been released.

New in this release:

-
- Store / retrieve Domain Queries to / from the graph db.
- JcQueryParameter to be used with Query DSL expressions.

*There is one API change which is not backward compatible:*

In class *Property* there where two implementations of method value(...):
*public <E> T value(E value)*, and *public <E> T value(E... value)*.
This was ambiguous in case of a single argument and some language compilers
like e.g. for Scala had problems with that.
This is now solved by using different method names:
*public <E> T value(E value)*, and *public <E> T values(E... value)*.
If you are using this API you are required to change the method name(s) in
your code.

For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/P12-Outlook-(Roadmap)>
.
There is also a page outlining ideas for future development directions of
JCypher: *Future Zone* <http://jcypher.iot-solutions.net/future_zone.html>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2016-08-30 16:21:15 UTC
Permalink
Hi everybody,

*JCypher* *3.5.0 *has been released.

New in this release:

- Support for *Neo4J 3.0.X* and the *BOLT* protocol.

For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/Outlook-(Roadmap)>.
There is also a page outlining ideas for future development directions of
JCypher: *Future Zone* <http://jcypher.iot-solutions.net/future_zone.html>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2016-10-31 12:52:16 UTC
Permalink
Hi everybody,

*JCypher* *3.6.0 *has been released.

New in this release:

-
- Some improvements like simple construction of literal lists.
- Code compatibility with Java 1.7 (JCypher since 3.5.0 however is built
for Java 1.8. This is required, so that JCypher- embedded and- in-memory db
access works with Neo4J 3.0.x ).

For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/Outlook-(Roadmap)>.
There is also a page outlining ideas for future development directions of
JCypher: *Future Zone* <http://jcypher.iot-solutions.net/future_zone.html>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2017-02-24 13:40:43 UTC
Permalink
Hi everybody,

*JCypher* *3.7.0 *has been released.

New in this release:

- Support for Neo4j 3.1.1.
- Extended Authentication when using BOLT

For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/Outlook-(Roadmap)>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
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suresh bojjam
2017-11-15 08:11:58 UTC
Permalink
Hi Wolfgang Schuetzelhofer,

I am trying to explore JCypher with layer "JCypher-Query-DSL".
How can we get the newly created Node id from JCypher? please look at the
below is the snippet.

query1.setClauses(new IClause[] {
MERGE.node(user)
.property("NAME").value("Suresh")
.property("MYID").value("123")
.label("User")
//.relation().property("NAME").value("Access").out().node(table)
});

JcQueryResult result=executeQuery(query1);
if(result!=null) {
ObjectMapper mapper=new ObjectMapper();
System.out.println("result: "+mapper.writeValueAsString(result));
}else{
System.out.println("Null Result");
}
JcNumber id=user.id().asNumber();
System.out.println("user.id(): "+id.asString());

thanks,
suresh

On Monday, July 31, 2017 at 11:08:08 PM UTC+5:30, Wolfgang Schuetzelhofer
Post by Wolfgang Schuetzelhofer
Hi everybody,
*JCypher* *3.8.0 *has been released.
- Support for Neo4j 3.2.2.
- Shutdown hooks in IDBAccess optional
- Public constructors for IDBAccess implementations allow more
flexibly customizable configurations. Although you are highly encouraged to
use DBAccessFactory, you are no longer forced to do so.
For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/Outlook-(Roadmap)>
.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*
best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2017-11-20 07:55:26 UTC
Permalink
Hi Suresh Bojjam,

the following code snippet should work:

IClause[] clauses;
JcQuery query;
String cypher;
JcNode user = new JcNode("user");
JcNumber id = new JcNumber("_id");
clauses = new IClause[]{
MERGE.node(user)
.property("NAME").value("Suresh")
.property("MYID").value("123")
.label("User"),
RETURN.value(user.id()).AS(id)
};
query = new JcQuery();
query.setClauses(clauses);
BigDecimal idResult = null;
JcQueryResult result = dbAccess.execute(query);
if (!result.hasErrors()) {
idResult = result.resultOf(id).get(0);
}

best regards,
Wolfgang
Post by suresh bojjam
Hi Wolfgang Schuetzelhofer,
I am trying to explore JCypher with layer "JCypher-Query-DSL".
How can we get the newly created Node id from JCypher? please look at the
below is the snippet.
query1.setClauses(new IClause[] {
MERGE.node(user)
.property("NAME").value("Suresh")
.property("MYID").value("123")
.label("User")
//.relation().property("NAME").value("Access").out().node(table)
});
JcQueryResult result=executeQuery(query1);
if(result!=null) {
ObjectMapper mapper=new ObjectMapper();
System.out.println("result: "+mapper.writeValueAsString(result));
}else{
System.out.println("Null Result");
}
JcNumber id=user.id().asNumber();
System.out.println("user.id(): "+id.asString());
thanks,
suresh
On Monday, July 31, 2017 at 11:08:08 PM UTC+5:30, Wolfgang Schuetzelhofer
Post by Wolfgang Schuetzelhofer
Hi everybody,
*JCypher* *3.8.0 *has been released.
- Support for Neo4j 3.2.2.
- Shutdown hooks in IDBAccess optional
- Public constructors for IDBAccess implementations allow more
flexibly customizable configurations. Although you are highly encouraged to
use DBAccessFactory, you are no longer forced to do so.
For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/Outlook-(Roadmap)>
.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*
best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2017-12-22 11:32:51 UTC
Permalink
Hi everybody,

*JCypher* *3.9.0 *has been released.

New in this release:

- Support for Neo4j 3.3.1.
- Set planner strategy globally or individually on a per query basis

For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/Outlook-(Roadmap)>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2018-08-03 11:28:11 UTC
Permalink
Hi everybody,

*JCypher* *4.0.0 *has been released.

New in this release:

- Support for Neo4j 3.4.1.

For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/Outlook-(Roadmap)>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
--
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Wolfgang Schuetzelhofer
2018-09-01 08:40:19 UTC
Permalink
Hi everybody,

*JCypher* *4.0.1 *has been released.

This is a bugfix release. What is fixed (changed):

- minHops(0) now works correctly. Previously it was translated to cypher
*.. or * respectively for specifying a link's min cardinality to be zero.
However in practice this returns a min cardinality of one. Now minHops(0)
is translated to cypher *0.. which works correctly. This also changes the
behaviour of Domain Query expression DISTANCE(min, max) with a min of 0.
This works correctly now but has changed it's behaviour, so you might need
to adopt some of your queries.

For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/Outlook-(Roadmap)>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
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Analista de Sistemas Web/Mobile
2018-09-01 20:57:14 UTC
Permalink
tanks..

On Sat, Sep 1, 2018 at 5:40 AM Wolfgang Schuetzelhofer <
Post by Wolfgang Schuetzelhofer
Hi everybody,
*JCypher* *4.0.1 *has been released.
- minHops(0) now works correctly. Previously it was translated to
cypher *.. or * respectively for specifying a link's min cardinality to be
zero. However in practice this returns a min cardinality of one. Now
minHops(0) is translated to cypher *0.. which works correctly. This also
changes the behaviour of Domain Query expression DISTANCE(min, max) with a
min of 0. This works correctly now but has changed it's behaviour, so you
might need to adopt some of your queries.
For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/Outlook-(Roadmap)>
.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*
best regards,
Wolfgang Schuetzelhofer
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Wolfgang Schuetzelhofer
2018-09-24 12:56:26 UTC
Permalink
Hi everybody,

*JCypher* *4.1.0 *has been released.

New in this release:

-
- Collections in the Query API are now aware of their component type
This allows expressions like:
*WHERE.valueOf(path.relations().last().type()).EQUALS("Some_Type")* or:
*WHERE.has(path.nodes().head().label("Some_Label"))*

For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/Outlook-(Roadmap)>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
--
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Wolfgang Schuetzelhofer
2018-11-07 09:34:31 UTC
Permalink
Hi everybody,

*JCypher* *4.1.1 *has been released.

This is a bugfix release. What is fixed:

- Issue with labels retrieval when using AbstractEmbeddedDBAccess and
forcing PlannerStrategy.COST.

For what's new in JCypher,
you may also want to have a look at the *release notes
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/blob/master/release_notes.md>.*
If you are interested about what will be in the next release(s), please
have a look at *Outlook (Roadmap)*
<https://github.com/Wolfgang-Schuetzelhofer/jcypher/wiki/Outlook-(Roadmap)>.
For a complete overview please start at JCypher's *Project Home Page
<http://jcypher.iot-solutions.net/>.*

best regards,
Wolfgang Schuetzelhofer
--
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