Java IJavaElementDelta.F_REMOVED_FROM_CLASSPATH属性代码示例

private Set<IJavaProject> getJavaProjectsWithClasspathChange(IJavaElementDelta delta) {
	IJavaElement element = delta.getElement();
	if (element instanceof IPackageFragmentRoot) {
		IPackageFragmentRoot root = (IPackageFragmentRoot) element;
		if (delta.getKind() == IJavaElementDelta.REMOVED || delta.getKind() == IJavaElementDelta.ADDED
				|| (delta.getFlags() & IJavaElementDelta.F_REORDER) != 0
				|| (delta.getFlags() & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0
				|| (delta.getFlags() & IJavaElementDelta.F_ADDED_TO_CLASSPATH) != 0
				|| (root.isExternal() && (delta.getFlags() & // external folders change
				(IJavaElementDelta.F_CONTENT | IJavaElementDelta.F_SOURCEATTACHED | IJavaElementDelta.F_SOURCEDETACHED)) == delta
						.getFlags())) {
			return Collections.singleton(root.getJavaProject());
		}
	} else if (element instanceof IJavaModel) {
		return getPackageFragmentRootDeltas(delta.getAffectedChildren());
	} else if (element instanceof IJavaProject) {
		if ((delta.getFlags() & IJavaElementDelta.F_CLASSPATH_CHANGED) != 0
				|| (delta.getFlags() & IJavaElementDelta.F_RESOLVED_CLASSPATH_CHANGED) != 0)
			return Collections.singleton((IJavaProject) element);
		return getPackageFragmentRootDeltas(delta.getAffectedChildren());
	}
	return Collections.emptySet();
}
 

private boolean isAffectingPackageFragmentRoots(IJavaElementDelta delta) {
	IJavaElement element = delta.getElement();
	if (element instanceof IPackageFragmentRoot) {
		if (delta.getKind() == IJavaElementDelta.REMOVED
			|| delta.getKind() == IJavaElementDelta.ADDED
			|| (delta.getFlags() & IJavaElementDelta.F_REORDER) != 0
			|| (delta.getFlags() & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0
			|| (delta.getFlags() & IJavaElementDelta.F_ADDED_TO_CLASSPATH) != 0
			|| (((IPackageFragmentRoot) element).isExternal() && (delta.getFlags() & // external folders change
					(IJavaElementDelta.F_CONTENT 
							| IJavaElementDelta.F_SOURCEATTACHED 
							| IJavaElementDelta.F_SOURCEDETACHED)) == delta.getFlags())) {
			return true;
		}
	} else if (element instanceof IJavaModel) {
		return isAffectingPackageFragmentRoots(delta.getAffectedChildren());
	} else if (element instanceof IJavaProject) {
		if ((delta.getFlags() & IJavaElementDelta.F_CLASSPATH_CHANGED) != 0 ||
				(delta.getFlags() & IJavaElementDelta.F_RESOLVED_CLASSPATH_CHANGED) != 0)
			return true;
		return isAffectingPackageFragmentRoots(delta.getAffectedChildren());
	}
	return false;
}
 

/**
 * Do the flags indicate a classpath change?
 * @param flags the flags to inspect
 * @return true if the flag flags a classpath change
 */
private boolean isClasspathChangeFlag(int flags) {
	if ((flags & IJavaElementDelta.F_RESOLVED_CLASSPATH_CHANGED) != 0)
		return true;

	if ((flags & IJavaElementDelta.F_ADDED_TO_CLASSPATH) != 0)
		return true;

	if ((flags & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0)
		return true;

	if ((flags & IJavaElementDelta.F_ARCHIVE_CONTENT_CHANGED) != 0)
		return true;

	return false;
}
 

/**
 * Do the flags indicate a classpath change?
 *
 * @param flags the flags to inspect
 * @return true if the flag flags a classpath change
 */
private boolean isClasspathChangeFlag(int flags) {
	if ((flags & IJavaElementDelta.F_RESOLVED_CLASSPATH_CHANGED) != 0) {
		return true;
	}

	if ((flags & IJavaElementDelta.F_ADDED_TO_CLASSPATH) != 0) {
		return true;
	}

	if ((flags & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0) {
		return true;
	}

	if ((flags & IJavaElementDelta.F_ARCHIVE_CONTENT_CHANGED) != 0) {
		return true;
	}

	return false;
}
 

/**
 * Tests if the a Java element delta contains a class path change
 *
 * @param delta the Java element delta
 * @return returns <code>true</code> if the delta contains a class path change
 */
protected boolean isClassPathChange(IJavaElementDelta delta) {

  // need to test the flags only for package fragment roots
  if (delta.getElement().getElementType() != IJavaElement.PACKAGE_FRAGMENT_ROOT) return false;

  int flags = delta.getFlags();
  return (delta.getKind() == IJavaElementDelta.CHANGED
          && ((flags & IJavaElementDelta.F_ADDED_TO_CLASSPATH) != 0)
      || ((flags & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0)
      || ((flags & IJavaElementDelta.F_REORDER) != 0));
}
 

/**
 * Tests if the a Java element delta contains a class path change
 *
 * @param delta the Java element delta
 * @return returns <code>true</code> if the delta contains a class path change
 */
protected boolean isClassPathChange(IJavaElementDelta delta) {

	// need to test the flags only for package fragment roots
	if (delta.getElement().getElementType() != IJavaElement.PACKAGE_FRAGMENT_ROOT)
		return false;

	int flags= delta.getFlags();
	return (delta.getKind() == IJavaElementDelta.CHANGED &&
		((flags & IJavaElementDelta.F_ADDED_TO_CLASSPATH) != 0) ||
		 ((flags & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0) ||
		 ((flags & IJavaElementDelta.F_REORDER) != 0));
}
 

@Override
protected void processDelta(IJavaElementDelta delta, List<IJavaElement> result) {
	IJavaElement elem= delta.getElement();

	boolean isChanged= delta.getKind() == IJavaElementDelta.CHANGED;
	boolean isRemoved= delta.getKind() == IJavaElementDelta.REMOVED;
	int flags= delta.getFlags();

	switch (elem.getElementType()) {
		case IJavaElement.JAVA_MODEL:
			processChildrenDelta(delta, result);
			return;
		case IJavaElement.JAVA_PROJECT:
			if (isRemoved || (isChanged &&
					(flags & IJavaElementDelta.F_CLOSED) != 0)) {
				return;
			}
			processChildrenDelta(delta, result);
			return;
		case IJavaElement.PACKAGE_FRAGMENT_ROOT:
			if (isRemoved) {
				return;
			}
			try {
				if ((((flags & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0) ||
						((flags & IJavaElementDelta.F_ADDED_TO_CLASSPATH) != 0))
						&& ((IPackageFragmentRoot)elem).getKind() != IPackageFragmentRoot.K_SOURCE) {
					result.add(elem);
				}
			} catch (JavaModelException e) {
				// don't update
			}
			return;
		default:
			return;
	}
}
 

protected boolean isClassPathChange(IJavaElementDelta delta) {

		// need to test the flags only for package fragment roots
		if (delta.getElement().getElementType() != IJavaElement.PACKAGE_FRAGMENT_ROOT)
			return false;

		int flags= delta.getFlags();
		return (delta.getKind() == IJavaElementDelta.CHANGED &&
			((flags & IJavaElementDelta.F_ADDED_TO_CLASSPATH) != 0) ||
			 ((flags & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0) ||
			 ((flags & IJavaElementDelta.F_REORDER) != 0));
	}
 

private void addClasspathDeltas(JavaElementDelta delta, IPackageFragmentRoot[] roots, int flag) {
	for (int i = 0; i < roots.length; i++) {
		IPackageFragmentRoot root = roots[i];
		delta.changed(root, flag);
		if ((flag & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0
				|| (flag & IJavaElementDelta.F_SOURCEATTACHED) != 0
				|| (flag & IJavaElementDelta.F_SOURCEDETACHED) != 0){
			try {
				root.close();
			} catch (JavaModelException e) {
				// ignore
			}
		}
	}
}
 

/**
 * Computes whether the history needs a consistency check or not.
 *
 * @param delta the Java element delta
 *
 * @return <code>true</code> if consistency must be checked
 *  <code>false</code> otherwise.
 */
private boolean processDelta(IJavaElementDelta delta) {
	IJavaElement elem= delta.getElement();

	boolean isChanged= delta.getKind() == IJavaElementDelta.CHANGED;
	boolean isRemoved= delta.getKind() == IJavaElementDelta.REMOVED;

	switch (elem.getElementType()) {
		case IJavaElement.JAVA_PROJECT:
			if (isRemoved || (isChanged &&
					(delta.getFlags() & IJavaElementDelta.F_CLOSED) != 0)) {
				return true;
			}
			return processChildrenDelta(delta);
		case IJavaElement.PACKAGE_FRAGMENT_ROOT:
			if (isRemoved || (isChanged && (
					(delta.getFlags() & IJavaElementDelta.F_ARCHIVE_CONTENT_CHANGED) != 0 ||
					(delta.getFlags() & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0))) {
				return true;
			}
			return processChildrenDelta(delta);
		case IJavaElement.TYPE:
			if (isChanged && (delta.getFlags() & IJavaElementDelta.F_MODIFIERS) != 0) {
				return true;
			}
			if (isRemoved) {
				return true;
			}
			return processChildrenDelta(delta);
		case IJavaElement.JAVA_MODEL:
		case IJavaElement.PACKAGE_FRAGMENT:
		case IJavaElement.CLASS_FILE:
			if (isRemoved) {
				return true;
			}
			return processChildrenDelta(delta);
		case IJavaElement.COMPILATION_UNIT:
			// Not the primary compilation unit. Ignore it
			if (!JavaModelUtil.isPrimary((ICompilationUnit) elem)) {
				return false;
			}

			if (isRemoved || (isChanged && isUnknownStructuralChange(delta.getFlags()))) {
				return true;
			}
			return processChildrenDelta(delta);
		default:
			// fields, methods, imports ect
			return false;
	}
}
 

/**
 * Recursively check whether the class file has been deleted.
 * 
 * @param input the package fragment root
 * @param delta the Java element delta
 * @return <code>true</code> if delta processing can be stopped
 */
protected boolean check(IPackageFragmentRoot input, IJavaElementDelta delta) {
	IJavaElement element= delta.getElement();

	if ((delta.getKind() & IJavaElementDelta.REMOVED) != 0 || (delta.getFlags() & IJavaElementDelta.F_CLOSED) != 0) {
		// http://dev.eclipse.org/bugs/show_bug.cgi?id=19023
		if (element.equals(input.getJavaProject()) || element.equals(input)) {
			handleDeleted(fInput);
			return true;
		}
	}

	if (((delta.getFlags() & IJavaElementDelta.F_ARCHIVE_CONTENT_CHANGED) != 0) && input.equals(element)) {
		handleDeleted(fInput);
		return true;
	}

	if (((delta.getFlags() & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0) && input.equals(element)) {
		handleDeleted(fInput);
		return true;
	}

	IJavaElementDelta[] subdeltas= delta.getAffectedChildren();
	for (int i= 0; i < subdeltas.length; i++) {
		if (check(input, subdeltas[i]))
			return true;
	}

	if ((delta.getFlags() & IJavaElementDelta.F_SOURCEDETACHED) != 0 ||
		(delta.getFlags() & IJavaElementDelta.F_SOURCEATTACHED) != 0)
	{
		IClassFile file= fInput != null ? fInput.getClassFile() : null;
		IJavaProject project= input != null ? input.getJavaProject() : null;

		boolean isOnClasspath= false;
		if (file != null && project != null)
			isOnClasspath= project.isOnClasspath(file);

		if (isOnClasspath) {
			fireInputChanged(fInput);
			return false;
		} else {
			handleDeleted(fInput);
			return true;
		}
	}

	return false;
}
 

@Override
protected void processDelta(IJavaElementDelta delta, List<IJavaElement> result) {
	IJavaElement elem= delta.getElement();

	boolean isChanged= delta.getKind() == IJavaElementDelta.CHANGED;
	boolean isRemoved= delta.getKind() == IJavaElementDelta.REMOVED;
	int flags= delta.getFlags();

	switch (elem.getElementType()) {
		case IJavaElement.JAVA_PROJECT:
			if (isRemoved || (isChanged &&
					(flags & IJavaElementDelta.F_CLOSED) != 0)) {
				return;
			}
			processChildrenDelta(delta, result);
			return;
		case IJavaElement.PACKAGE_FRAGMENT_ROOT:
			if (isRemoved || (isChanged && (
					(flags & IJavaElementDelta.F_ARCHIVE_CONTENT_CHANGED) != 0 ||
					(flags & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0))) {
				return;
			}
			processChildrenDelta(delta, result);
			return;
		case IJavaElement.PACKAGE_FRAGMENT:
			if (isRemoved)
				return;
			processChildrenDelta(delta, result);
			return;
		case IJavaElement.TYPE:
		case IJavaElement.CLASS_FILE:
			return;
		case IJavaElement.JAVA_MODEL:
			processChildrenDelta(delta, result);
			return;
		case IJavaElement.COMPILATION_UNIT:
			// Not the primary compilation unit. Ignore it
			if (!JavaModelUtil.isPrimary((ICompilationUnit) elem)) {
				return;
			}

			if (isChanged &&  ((flags & IJavaElementDelta.F_CONTENT) != 0 || (flags & IJavaElementDelta.F_FINE_GRAINED) != 0)) {
				if (delta.getAffectedChildren().length == 0)
					return;

				result.add(elem);
			}
			return;
		default:
			// fields, methods, imports ect
			return;
	}
}