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Copyright (c) 2000, 2010 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 Contributors: IBM Corporation - initial API and implementation /
 
 package org.eclipse.jdt.core;
 
 import  org.eclipse.core.runtime.IPath;

Interface of a classpath container. A classpath container provides a way to indirectly reference a set of classpath entries through a classpath entry of kind CPE_CONTAINER. Typically, a classpath container can be used to describe a complex library composed of multiple JARs or projects, considering also that containers can map to different set of entries on each project, in other words, several projects can reference the same generic container path, but have each of them actually bound to a different container object.

The set of entries associated with a classpath container may contain any of the following:

  • library entries (CPE_LIBRARY)
  • project entries (CPE_PROJECT)
In particular, a classpath container can neither reference further classpath containers or classpath variables.

A library entry can reference other libraries through the Class-Path section of the JAR's MANIFEST.MF file. If the container wants such referenced entries to be part of the classpath, the container must explicitly add them to the array returned from getClasspathEntries().

Classpath container values are persisted locally to the workspace, but are not preserved from a session to another. It is thus highly recommended to register a ClasspathContainerInitializer for each referenced container (through the extension point "org.eclipse.jdt.core.ClasspathContainerInitializer").

Since:
2.0
See also:
IClasspathEntry
 
 
 public interface IClasspathContainer {

Kind for a container mapping to an application library
 
 	int K_APPLICATION = 1;

Kind for a container mapping to a system library
 
 	int K_SYSTEM = 2;

Kind for a container mapping to a default system library, implicitly contributed by the runtime
 
 	int K_DEFAULT_SYSTEM = 3;

Answers the set of classpath entries this container is mapping to.

The set of entries associated with a classpath container may contain any of the following:

  • library entries (CPE_LIBRARY)
  • project entries (CPE_PROJECT)
A classpath container can neither reference further classpath containers or classpath variables.

A library entry can reference other libraries through the Class-Path section of the JAR's MANIFEST.MF file. If the container wants such referenced entries to be part of the classpath, the container must explicitly add them to the result.

This method is called by the Java model when it needs to resolve this classpath container entry into a list of library and project entries. The method is typically called exactly once for a given Java project, and the resulting list of entries cached internally by the Java model. This method must not be called by other clients.

There are a wide variety of conditions under which this method may be invoked. To ensure that the implementation does not interfere with correct functioning of the Java model, the implementation should use only the following Java model APIs:

  • JavaCore.newLibraryEntry(IPath, IPath, IPath, boolean) and variants
  • JavaCore.newProjectEntry(IPath, boolean) and variants
  • JavaCore.create(org.eclipse.core.resources.IWorkspaceRoot)
  • JavaCore.create(org.eclipse.core.resources.IProject)
  • JavaCore.getReferencedClasspathEntries(IClasspathEntry, IJavaProject) with null as project
  • IJavaModel.getJavaProjects()
  • IJavaProject.getRawClasspath()
  • IJavaProject.readRawClasspath()
  • IJavaProject.getOutputLocation()
  • IJavaProject.readOutputLocation()
  • Java element operations marked as "handle-only"
The effects of using other Java model APIs are unspecified.

Returns:
IClasspathEntry[] - the classpath entries this container represents
See also:
IClasspathEntry
Answers a readable description of this container

Returns:
String - a string description of the container
Answers the kind of this container. Can be either:
  • K_APPLICATION if this container maps to an application library
  • K_SYSTEM if this container maps to a system library
  • K_DEFAULT_SYSTEM if this container maps to a default system library (library implicitly contributed by the runtime).
Typically, system containers should be placed first on a build path.

Returns:
the kind of this container
    int getKind();

Answers the container path identifying this container. A container path is formed by a first ID segment followed with extra segments, which can be used as additional hints for resolving to this container.

The container ID is also used to identify aClasspathContainerInitializer registered on the extension point "org.eclipse.jdt.core.classpathContainerInitializer", which can be invoked if needing to resolve the container before it is explicitly set.

Returns:
IPath - the container path that is associated with this container
    IPath getPath();
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