StandardJavaElementContentProvider (Eclipse JDT API Specification)

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Eclipse JDT
Release 3.0

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org.eclipse.jdt.ui
Class StandardJavaElementContentProvider

java.lang.Object
  org.eclipse.jdt.ui.StandardJavaElementContentProvider

All Implemented Interfaces:: IContentProvider, IStructuredContentProvider, ITreeContentProvider, IWorkingCopyProvider

Direct Known Subclasses:: JavaElementContentProvider

public class StandardJavaElementContentProvider
extends Object
implements ITreeContentProvider, IWorkingCopyProvider

A base content provider for Java elements. It provides access to the Java element hierarchy without listening to changes in the Java model. If updating the presentation on Java model change is required than clients have to subclass, listen to Java model changes and have to update the UI using corresponding methods provided by the JFace viewers or their own UI presentation.

The following Java element hierarchy is surfaced by this content provider:

Java model (IJavaModel)
   Java project (IJavaProject)
      package fragment root (IPackageFragmentRoot)
         package fragment (IPackageFragment)
            compilation unit (ICompilationUnit)
            binary class file (IClassFile)

Note that when the entire Java project is declared to be package fragment root, the corresponding package fragment root element that normally appears between the Java project and the package fragments is automatically filtered out.

Since:: 2.0

Field Summary
protected boolean	fProvideMembers
protected boolean	fProvideWorkingCopy
protected static Object[]	NO_CHILDREN

Constructor Summary
StandardJavaElementContentProvider() Creates a new content provider.
StandardJavaElementContentProvider(boolean provideMembers) Creates a new StandardJavaElementContentProvider.
StandardJavaElementContentProvider(boolean provideMembers, boolean provideWorkingCopy) Deprecated. Use StandardJavaElementContentProvider(boolean) instead. Since 3.0 compilation unit children are always provided as working copies. The Java Model does not support the 'original' mode anymore.

Method Summary
protected static Object[]	concatenate(Object[] a1, Object[] a2) Note: This method is for internal use only.
void	dispose()
protected boolean	exists(Object element) Note: This method is for internal use only.
Object[]	getChildren(Object element)
Object[]	getElements(Object parent)
protected Object[]	getJavaProjects(IJavaModel jm) Note: This method is for internal use only.
protected Object[]	getPackageFragmentRoots(IJavaProject project) Note: This method is for internal use only.
Object	getParent(Object element)
boolean	getProvideMembers() Returns whether members are provided when asking for a compilation units or class file for its children.
boolean	getProvideWorkingCopy() Deprecated. Since 3.0 compilation unit children are always provided as working copies. The Java model does not support the 'original' mode anymore.
boolean	hasChildren(Object element)
void	inputChanged(Viewer viewer, Object oldInput, Object newInput)
protected Object	internalGetParent(Object element) Note: This method is for internal use only.
protected boolean	isClassPathChange(IJavaElementDelta delta) Note: This method is for internal use only.
protected boolean	isPackageFragmentEmpty(IJavaElement element) Note: This method is for internal use only.
protected boolean	isProjectPackageFragmentRoot(IPackageFragmentRoot root) Note: This method is for internal use only.
boolean	providesWorkingCopies() Returns true if the content provider returns working copy elements; otherwise false is returned.
void	setProvideMembers(boolean b) Sets whether the content provider is supposed to return members when asking a compilation unit or class file for its children.
void	setProvideWorkingCopy(boolean b) Deprecated. Since 3.0 compilation unit children are always provided from the working copy. The Java model offers a unified world and does not support the 'original' mode anymore.
protected Object	skipProjectPackageFragmentRoot(IPackageFragmentRoot root) Note: This method is for internal use only.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NO_CHILDREN

protected static final Object[] NO_CHILDREN

fProvideMembers

protected boolean fProvideMembers

fProvideWorkingCopy

protected boolean fProvideWorkingCopy

Constructor Detail

StandardJavaElementContentProvider

public StandardJavaElementContentProvider()

Creates a new content provider. The content provider does not provide members of compilation units or class files.

StandardJavaElementContentProvider

public StandardJavaElementContentProvider(boolean provideMembers,
                                          boolean provideWorkingCopy)

Deprecated. Use StandardJavaElementContentProvider(boolean) instead. Since 3.0 compilation unit children are always provided as working copies. The Java Model does not support the 'original' mode anymore.

StandardJavaElementContentProvider

public StandardJavaElementContentProvider(boolean provideMembers)

Creates a new StandardJavaElementContentProvider.
Parameters:: provideMembers - if true members below compilation units and class files are provided.

Method Detail

getProvideMembers

public boolean getProvideMembers()

Returns whether members are provided when asking for a compilation units or class file for its children.

Returns:: true if the content provider provides members; otherwise false is returned

setProvideMembers

public void setProvideMembers(boolean b)

Sets whether the content provider is supposed to return members when asking a compilation unit or class file for its children.

Parameters:: b - if true then members are provided. If false compilation units and class files are the leaves provided by this content provider.

getProvideWorkingCopy

public boolean getProvideWorkingCopy()

Deprecated. Since 3.0 compilation unit children are always provided as working copies. The Java model does not support the 'original' mode anymore.

setProvideWorkingCopy

public void setProvideWorkingCopy(boolean b)

Deprecated. Since 3.0 compilation unit children are always provided from the working copy. The Java model offers a unified world and does not support the 'original' mode anymore.

providesWorkingCopies

public boolean providesWorkingCopies()

Description copied from interface: IWorkingCopyProvider

Returns true if the content provider returns working copy elements; otherwise false is returned.

Specified by:: providesWorkingCopies in interface IWorkingCopyProvider

Returns:: whether working copy elements are provided.

getElements

public Object[] getElements(Object parent)

Specified by:: getElements in interface IStructuredContentProvider

inputChanged

public void inputChanged(Viewer viewer,
                         Object oldInput,
                         Object newInput)

Specified by:: inputChanged in interface IContentProvider

dispose

public void dispose()

Specified by:: dispose in interface IContentProvider

getChildren

public Object[] getChildren(Object element)

Specified by:: getChildren in interface ITreeContentProvider

hasChildren

public boolean hasChildren(Object element)

Specified by:: hasChildren in interface ITreeContentProvider

getParent

public Object getParent(Object element)

Specified by:: getParent in interface ITreeContentProvider