bundles/org.eclipse.wst.jsdt.core/src/org/eclipse/wst/jsdt/internal/core/LibraryPackageFragment.java

/*******************************************************************************
 * Copyright (c) 2000, 2008 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.wst.jsdt.internal.core;

import java.util.ArrayList;
import java.util.HashMap;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.wst.jsdt.core.JsGlobalScopeContainerInitializer;
import org.eclipse.wst.jsdt.core.IClassFile;
import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
import org.eclipse.wst.jsdt.core.IJavaScriptElement;
import org.eclipse.wst.jsdt.core.IJavaScriptModelStatusConstants;
import org.eclipse.wst.jsdt.core.JavaScriptModelException;
import org.eclipse.wst.jsdt.internal.compiler.util.SuffixConstants;
import org.eclipse.wst.jsdt.internal.core.util.Messages;

/**
 * A package fragment that represents a package fragment found in a JAR.
 *
 * @see org.eclipse.wst.jsdt.core.IPackageFragment
 */
public class LibraryPackageFragment extends PackageFragment implements SuffixConstants {
final static String[]DEFAULT_PACKAGE={""}; //$NON-NLS-1$
/**
 * Constructs a package fragment that is contained within a jar or a zip.
 */
protected LibraryPackageFragment(PackageFragmentRoot root, String[] names) {
	super(root, DEFAULT_PACKAGE);
}
/**
 * Compute the children of this package fragment. Children of jar package fragments
 * can only be IClassFile (representing .class files).
 */
protected boolean computeChildren(OpenableElementInfo info) {
	String name = this.getPackageFragmentRoot().getPath().toOSString();
	ClassFile classFile = new ClassFile(this,name);
//	JavaScriptUnit cu= new JavaScriptUnit(this, this.getPackageFragmentRoot().getPath().toOSString(), DefaultWorkingCopyOwner.PRIMARY);
	IJavaScriptElement[] children= new IJavaScriptElement[]{classFile};
	info.setChildren(children);
	return true;
}

/**
 * Returns true if this fragment contains at least one java resource.
 * Returns false otherwise.
 */
public boolean containsJavaResources() throws JavaScriptModelException {
	return true;
}
/**
 * @see org.eclipse.wst.jsdt.core.IPackageFragment
 */
public IJavaScriptUnit createCompilationUnit(String cuName, String contents, boolean force, IProgressMonitor monitor) throws JavaScriptModelException {
	throw new JavaScriptModelException(new JavaModelStatus(IJavaScriptModelStatusConstants.READ_ONLY, this));
}
/**
 * @see JavaElement
 */
protected Object createElementInfo() {
	return null; // not used for JarPackageFragments: info is created when jar is opened
}
/*
 * @see JavaElement#generateInfos
 */
protected void generateInfos(Object info, HashMap newElements, IProgressMonitor pm) throws JavaScriptModelException {
	// Open my jar: this creates all the pkg infos
	Openable openableParent = (Openable)this.parent;
	if (!openableParent.isOpen()) {
		openableParent.generateInfos(openableParent.createElementInfo(), newElements, pm);
	}
}
/**
 * @see org.eclipse.wst.jsdt.core.IPackageFragment
 */
public IClassFile[] getClassFiles() throws JavaScriptModelException {
	ArrayList list = getChildrenOfType(CLASS_FILE);
	IClassFile[] array= new IClassFile[list.size()];
	list.toArray(array);
	return array;
}
/**
 * A jar package fragment never contains compilation units.
 * @see org.eclipse.wst.jsdt.core.IPackageFragment
 */
public IJavaScriptUnit[] getJavaScriptUnits() {
	return NO_COMPILATION_UNITS;
}
/**
 * A package fragment in a jar has no corresponding resource.
 *
 * @see IJavaScriptElement
 */
public IResource getCorrespondingResource() {
	return null;
}
/**
 * Returns an array of non-java resources contained in the receiver.
 */
public Object[] getNonJavaScriptResources() throws JavaScriptModelException {
	if (this.isDefaultPackage()) {
		// We don't want to show non java resources of the default package (see PR #1G58NB8)
		return JavaElementInfo.NO_NON_JAVA_RESOURCES;
	} else {
		return this.storedNonJavaResources();
	}
}
/**
 * Jars and jar entries are all read only
 */
public boolean isReadOnly() {
	return true;
}
 static final Object[] NO_OBJECTS={};
protected Object[] storedNonJavaResources() throws JavaScriptModelException {
	return NO_OBJECTS;
}

protected boolean resourceExists() {
		return getPackageFragmentRoot().resourceExists();
}

protected LibraryFragmentRoot getLibraryFragmentRoot()
{
	return (LibraryFragmentRoot) getPackageFragmentRoot();
}

public IClassFile getClassFile(String classFileName) {
	if (!org.eclipse.wst.jsdt.internal.compiler.util.Util.isClassFileName(classFileName)) {
		throw new IllegalArgumentException(Messages.element_invalidClassFileName);
	}

	IPath path = getLibraryFragmentRoot().getPath();
//	if (org.eclipse.wst.jsdt.internal.compiler.util.Util.isClassFileName(path.lastSegment().toCharArray())
//			&& path.lastSegment().equalsIgnoreCase(classFileName))
//	{
	if(path.toOSString().endsWith(classFileName)
 		|| path.isPrefixOf(new Path(classFileName))) {
		return new ClassFile(this, path.toOSString());

	}

	return super.getClassFile(classFileName);
}
public String getDisplayName() {
	if(parent instanceof LibraryFragmentRoot) {
		JsGlobalScopeContainerInitializer initializer = ((LibraryFragmentRoot)parent).getContainerInitializer();
		if(initializer==null) return getPath().removeLastSegments(1).toString();
		String name = initializer.getDescription(getPath(), getJavaScriptProject());
		if(name!=null) return name;
	}
	return  parent.getPath().lastSegment();
}

}