#
Value Variables

###### Identifier:

org.eclipse.core.variables.valueVariables

###### Since:

3.0

###### Description:

This extension point provides a mechanism for defining variables used for string substitution. A value variable has a static value.

###### Configuration Markup:

<!ELEMENT extension (variable*)>

<!ATTLIST extension

point CDATA #REQUIRED

id CDATA #IMPLIED

name CDATA #IMPLIED>

- point - a fully qualified identifier of the target extension point
- id - an optional identifier of the extension instance
- name - an optional name of the extension instance

<!ELEMENT variable EMPTY>

<!ATTLIST variable

name CDATA #REQUIRED

initialValue CDATA #IMPLIED

initializerClass CDATA #IMPLIED

description CDATA #IMPLIED>

- name - specifies a unique name for this variable.
- initialValue - specifies the initial value for this variable. When specified, an `initializerClass` attribute must not be specified.
- initializerClass - specifies the fully qualified name of the Java class that implements `org.eclipse.core.variables.IValueVariableInitializer`. When specified, an `initialValue` attribute must not be specified.
- description - specifies a human-readable description of this variable.

###### Examples:

The following is an example of a value variable contribution with an initial value:

     <extension point="org.eclipse.core.variables.valueVariables">
      <variable
       name="FOO_HOME"
       initialValue="/usr/local/foo">
      </variable>
     </extension>

In the example above, the specified variable is created with the initial value "/usr/local/foo". The following is an example of a value variable contribution with an initializer class:

     <extension point="org.eclipse.core.variables.valueVariables">
      <variable
       name="FOO_HOME"
       initializerClass="com.example.FooLocator">
      </variable>
     </extension>

In the example above, the variable FOO_HOME is created and the class "com.example.FooLocator" will be used to initialize the value the first time it's requested.

###### API Information:

Value of the attribute initializerClass must be a fully qualified name of a Java class that implements the interface org.eclipse.core.variables.IValueVariableInitializer.

Copyright (c) 2003, 2005 IBM Corporation and others.
All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html