Difference between revisions of "Java Examples"

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This page is part of the [[Developer Section]].
 
This page is part of the [[Developer Section]].
The following Java code snippets demonstrate how easy it is to run database commands, create collections, perform queries, etc. via the BaseX API. Most examples are taken from our [https://github.com/BaseXdb/basex-examples/tree/master/src/main/java/org/basex/examples basex-examples] repository, in which you will find some more use cases.
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The following Java code snippets demonstrate how easy it is to run database commands, create collections, perform queries, etc. by integrating the BaseX code. Most examples are taken from our [https://github.com/BaseXdb/basex/tree/master/basex-examples/src/main/java/org/basex/examples/ basex-examples] repository, in which you will find some more use cases.
 
 
Note that we recommend everyone to use our own APIs, as they offer better performance and are better supported by our core team. The use of the <code>XML:DB</code> and <code>XQJ</code> APIs is discouraged: as these APIs do not utilize the client/server architecture of BaseX, their use may lead to conflicting database access operations.
 
  
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<div style="float:left; width:48%;">
 
==Local Examples==
 
==Local Examples==
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/query/RunCommands.java RunCommands.java]
 
:creates and drops database and index instances, prints a list of all existing databases.
 
 
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/WikiExample.java WikiExample.java]
 
:creates a database from an url (wiki instance), runs a query against it and drops the database.
 
 
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/query/RunQueries.java RunQueries.java]
 
:shows three variants of running queries.
 
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/query/CreateCollection.java CreateCollection.java]
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The following code snippets work in ''embedded'' mode; they do not rely on an additional server instance:
:creates and manages a collection.
 
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/query/QueryCollection.java QueryCollection.java]
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/local/RunCommands.java RunCommands.java]<br/>creates and drops database and index instances, prints a list of all existing databases.
:creates, runs queries against it and drops a collection.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/local/RunQueries.java RunQueries.java]<br/>shows three variants of running queries.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/local/BindContext.java BindContext.java]<br/>demonstrates how a value can be bound as context item.
 +
* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/local/BindVariables.java BindVariables.java]<br/>demonstrates how a value can be bound to a variable.
 +
* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/local/CreateCollection.java CreateCollection.java]<br/>creates and manages a collection.
 +
* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/local/QueryCollection.java QueryCollection.java]<br/>creates, runs queries against it and drops a collection.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/local/WikiExample.java WikiExample.java]<br/>creates a database from an url (wiki instance), runs a query against it and drops the database.
  
 
==Server Examples==
 
==Server Examples==
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/server/ServerCommands.java ServerCommands.java]
 
:launches server-side commands using a client session.
 
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/server/ServerAndLocal.java ServerAndLocal.java]
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The examples below take advantage of the client/server architecture:
:processes server results locally.
 
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/server/ServerConcurrency.java ServerConcurrency.java]
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/server/ServerCommands.java ServerCommands.java]<br/>launches server-side commands using a client session.
:runs concurrent queries.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/server/ServerAndLocal.java ServerAndLocal.java]<br/>processes server results locally.
 +
* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/server/ServerConcurrency.java ServerConcurrency.java]<br/>runs concurrent queries.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/server/ServerQueries.java ServerQueries.java]<br/>shows how iterative queries can be performed.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/server/UserExample.java UserExample.java]<br/>manages database users.
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/UserExample.java UserExample.java]
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==XQuery Module Examples==
:manages database users.
 
  
==[[REST API]] Examples==
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BaseX provides [[Java Bindings]] for accessing external Java code via XQuery functions. The following examples show how this feature can be utilized:
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/rest/RESTGet.java RESTGet.java]
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/module/FruitsExample.java FruitsExample.java]<br/>demonstrates how Java classes can be imported as XQuery modules.
:presents the HTTP GET method.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/module/FruitsModule.java FruitsModule.java]<br/>is a simple demo module called by {{Code|FruitsExample}}.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/module/ModuleDemo.java ModuleDemo.java]<br/>is a simple XQuery demo module that demonstrates how XQuery items can be processed from Java. It is derived from the {{Code|QueryModule}} class.
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* [https://github.com/BaseXdb/basex/blob/master/basex-core/src/main/java/org/basex/query/QueryModule.java QueryModule.java]<br/>is located in the BaseX core. Java query modules can extend this class to get access to the current query context and enrich functions with properties ().
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/rest/RESTPost.java RESTPost.java]
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</div><div style="float:left; width:4%;">&nbsp;
:presents the HTTP POST method.
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</div><div style="float:left; width:48%;">
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/rest/RESTPut.java RESTPut.java]
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==XQJ API==
:presents the HTTP PUT method.
 
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/rest/RESTDelete.java RESTDelete.java]
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The implementation of the [http://xqj.net/basex/ BaseX XQJ API] (closed-source) has been written by Charles Foster. It uses the client/server architecture.
:presents the HTTP DELETE method.
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The basex-examples repository contains [https://github.com/BaseXdb/basex/tree/master/basex-examples/src/main/java/org/basex/examples/xqj various examples] on how to use XQJ.
  
==XML:DB API Examples==
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==[[Clients|Client API]]==
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/xmldb/XMLDBCreate.java XMLDBCreate.java]
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/api/BaseXClient.java BaseXClient.java]<br/>provides an implementation of the [[Server Protocol]].
:creates a collection using XML:DB.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/api/Example.java Example.java]<br/>demonstrates how commands can be executed on a server.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/api/QueryExample.java QueryExample.java]<br/>shows how queries can be executed in an iterative manner.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/api/QueryBindExample.java QueryBindExample.java]<br/>shows how external variables can be bound to XQuery expressions.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/api/CreateExample.java CreateExample.java]<br/>shows how new databases can be created.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/api/AddExample.java AddExample.java]<br/>shows how documents can be added to databases, and how existing documents can be replaced.
 +
* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/api/BinaryExample.java BinaryExample.java]<br/>shows how binary resource can be added to and retrieved from the database.
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/xmldb/XMLDBQuery.java XMLDBQuery.java]
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==[[REST API]]==
:runs a query using XML:DB.
 
  
;[https://github.com/BaseXdb/basex-examples/blob/master/src/main/java/org/basex/examples/xmldb/XMLDBInsert.java XMLDBInsert.java]
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/rest/RESTGet.java RESTGet.java]<br/>presents the HTTP GET method.
:inserts a document into a database using XML:DB.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/rest/RESTPost.java RESTPost.java]<br/>presents the HTTP POST method.
 +
* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/rest/RESTPut.java RESTPut.java]<br/>presents the HTTP PUT method.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/rest/RESTAll.java RESTAll.java]<br/>runs all examples at one go.
  
==XQJ API Examples==
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==XML:DB API (deprecated)==
  
Since {{Version|7.2.1}}, BaseX uses Charles Foster’s generic [http://xqj.net/basex/ XQJ API].
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Note that the XML:DB API does not talk to the server and can thus only be used in embedded mode.
  
[[Category:Developer]]
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/xmldb/XMLDBCreate.java XMLDBCreate.java]<br/>creates a collection using XML:DB.
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* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/xmldb/XMLDBQuery.java XMLDBQuery.java]<br/>runs a query using XML:DB.
 +
* [https://github.com/BaseXdb/basex/blob/master/basex-examples/src/main/java/org/basex/examples/xmldb/XMLDBInsert.java XMLDBInsert.java]<br/>inserts a document into a database using XML:DB.
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</div>
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__NOTOC__

Revision as of 14:56, 17 January 2016

This page is part of the Developer Section. The following Java code snippets demonstrate how easy it is to run database commands, create collections, perform queries, etc. by integrating the BaseX code. Most examples are taken from our basex-examples repository, in which you will find some more use cases.

Local Examples

The following code snippets work in embedded mode; they do not rely on an additional server instance:

Server Examples

The examples below take advantage of the client/server architecture:

XQuery Module Examples

BaseX provides Java Bindings for accessing external Java code via XQuery functions. The following examples show how this feature can be utilized:

  • FruitsExample.java
    demonstrates how Java classes can be imported as XQuery modules.
  • FruitsModule.java
    is a simple demo module called by FruitsExample.
  • ModuleDemo.java
    is a simple XQuery demo module that demonstrates how XQuery items can be processed from Java. It is derived from the QueryModule class.
  • QueryModule.java
    is located in the BaseX core. Java query modules can extend this class to get access to the current query context and enrich functions with properties ().
 

XQJ API

The implementation of the BaseX XQJ API (closed-source) has been written by Charles Foster. It uses the client/server architecture. The basex-examples repository contains various examples on how to use XQJ.

Client API

REST API

XML:DB API (deprecated)

Note that the XML:DB API does not talk to the server and can thus only be used in embedded mode.