plugins/org.eclipse.wst.common.modulecore/modulecore-src/org/eclipse/wst/common/componentcore/internal/flat/VirtualComponentFlattenUtility.java - webtools-common/webtools.common - Git at Google

 /*******************************************************************************
  * Copyright (c) 2009 Red Hat 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:
  *     Red Hat - Initial API and implementation
  *******************************************************************************/
 package org.eclipse.wst.common.componentcore.internal.flat;

 import java.io.File;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;

 import org.eclipse.core.resources.IContainer;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
 import org.eclipse.wst.common.componentcore.resources.IVirtualContainer;
 import org.eclipse.wst.common.componentcore.resources.IVirtualResource;

 /**
  * This utility class is almost entirely copied from ComponentDeployable
  * and deals with the nuts and bolts of creating the model objects when
  * walking a portion of the tree
  */
 public class VirtualComponentFlattenUtility {
 	public static interface ShouldIncludeUtilityCallback {
 		public boolean shouldAddComponentFile(IVirtualComponent current, IFlatFile file);
 	}

 	private List<IFlatResource> members;
 	private ShouldIncludeUtilityCallback handler;
 	public VirtualComponentFlattenUtility(
 			List<IFlatResource> members, ShouldIncludeUtilityCallback handler) {
 		this.members = members;
 		this.handler = handler;
 	}

 	public void addMembers(IVirtualComponent current, IVirtualContainer cont, IPath path) throws CoreException {
 		ensureParentExists(members, path, null);
 		FlatResource[] mr = addMembersInternal(current, cont, path);
 		int size = mr.length;
 		for (int j = 0; j < size; j++) {
 			members.add(mr[j]);
 		}
 	}

 	// Add this container's children
 	public void addContainer(IContainer container, IPath path) throws CoreException {
 		IResource[] children = container.members();
 		for( int i = 0; i < children.length; i++ ) {
 			if( children[i] instanceof IContainer ) {
 				addContainerInternal((IContainer)children[i], path);
 			} else if( children[i] instanceof IFile ){
 				addFile(null, (IFile)children[i], path);
 			}
 		}
 	}

 	// Physically adds this container
 	protected void addContainerInternal(IContainer container, IPath path) throws CoreException {
 		IFlatFolder mf = (FlatFolder) getExistingModuleResource(members,path.append(container.getName()).makeRelative());
 		if( mf == null ) {
 			mf = new FlatFolder(container, container.getName(), path);
 			IFlatFolder parent = (FlatFolder) getExistingModuleResource(members, path);
 			if (path.isEmpty())
 				members.add(mf);
 			else {
 				if (parent == null)
 					parent = ensureParentExists(members, path, container);
 				addMembersToModuleFolder(parent, new IFlatResource[] {mf});
 			}
 		}
 		// recurse
 		addContainer(container, path.append(container.getName()));
 	}

 	protected FlatResource[] addMembersInternal(IVirtualComponent current, IVirtualContainer cont, IPath path) throws CoreException {
 		IVirtualResource[] res = cont.members();
 		int size2 = res.length;
 		List list = new ArrayList(size2);
 		for (int j = 0; j < size2; j++) {
 			if (res[j] instanceof IVirtualContainer) {
 				IVirtualContainer cc = (IVirtualContainer) res[j];
 				IFlatFolder mf = addVirtualContainerInternal(cc, path);
 				IFlatResource[] mr = addMembersInternal(current, cc, path.append(cc.getName()));
 				addMembersToModuleFolder(mf, mr);
 			} else {
 				addFile(current, path, (IAdaptable)res[j]);
 			}
 		}
 		FlatResource[] mr = new FlatResource[list.size()];
 		list.toArray(mr);
 		return mr;
 	}

 	public void addFile(IVirtualComponent current, IPath path, IAdaptable file) {
 		IFile f = (IFile)file.getAdapter(IFile.class);
 		IFlatFile mf = null;
 		if( f != null )
 			 mf = createModuleFile(f, path.makeRelative());
 		else {
 			File f2 = (File)file.getAdapter(File.class);
 			if( f2 != null )
 				mf = new FlatFile(f2, f2.getName(), path.makeRelative());
 		}
 		if( mf != null ) {
 			if (handler == null || handler.shouldAddComponentFile(current, mf)) {
 				if( mf.getModuleRelativePath().isEmpty()) {
 					members.remove(mf);
 					members.add(mf);
 				}
 				else {
 					IFlatFolder moduleParent = VirtualComponentFlattenUtility.ensureParentExists(members, mf.getModuleRelativePath(), null);
 					List tempParentMembers = new ArrayList(Arrays.asList(moduleParent.members()));
 					tempParentMembers.remove(mf);
 					tempParentMembers.add(mf);
 					moduleParent.setMembers((IFlatResource[]) tempParentMembers.toArray(new IFlatResource[tempParentMembers.size()]));
 				}
 			}
 		}
 	}

 	public void addFile(IVirtualComponent current, IFile f, IPath path) {
 		addFile(current, path, (IAdaptable)f);
 	}

 	protected IFlatFolder addVirtualContainerInternal(IVirtualContainer cc, IPath path) {
 		// Retrieve already existing module folder if applicable
 		IFlatFolder mf = (FlatFolder) getExistingModuleResource(members,path.append(cc.getName()).makeRelative());
 		if (mf == null) {
 			mf = new FlatFolder((IContainer)cc.getUnderlyingResource(), cc.getName(), path);
 			IFlatFolder parent = (FlatFolder) getExistingModuleResource(members, path);
 			if (path.isEmpty())
 				members.add(mf);
 			else {
 				if (parent == null)
 					parent = ensureParentExists(members, path, (IContainer)cc.getUnderlyingResource());
 				addMembersToModuleFolder(parent, new IFlatResource[] {mf});
 			}
 		}
 		return mf;
 	}

 	public static FlatFile createModuleFile(final IFile file, final IPath path) {
 		return new FlatFile(file, file.getName(), path);
 	}


 	/**
 	 * Check the current cache to see if we already have an existing module resource for
 	 * the given path.
 	 * @param aList
 	 * @param path
 	 * @return an existing moduleResource from the cached result
 	 */

 	public static FlatResource getExistingModuleResource(List aList, IPath path) {
     	// If the list is empty, return null
     	if (aList==null || aList.isEmpty() || path == null)
     		return null;
     	// Otherwise recursively check to see if given resource matches current resource or if it is a child
     	String[] pathSegments = path.segments();
     	FlatResource exportableResource = null;

     	if(pathSegments.length == 0)
     		return null;
     	for (Iterator iter = aList.iterator(); iter.hasNext();) {
     		exportableResource = (FlatResource) iter.next();
     		String[] moduleSegments = exportableResource.getModuleRelativePath().segments();
     		// If the last segment in passed in path equals the module resource name
     		// and segment count is the same and the path segments start with the module path segments
     		// then we have a match and we return the existing moduleResource
     		if (pathSegments[pathSegments.length - 1].equals(exportableResource.getName()) &&
 		    		(moduleSegments.length + 1) == pathSegments.length &&
 		    		startsWith(moduleSegments, pathSegments))
 		    	return exportableResource;

     		// Otherwise, if it is a folder, check its children for the existing resource path
     		// but only check if the beginning segments are a match
 	    	if(exportableResource instanceof FlatFolder &&
 	    			startsWith(moduleSegments, pathSegments) && pathSegments.length > moduleSegments.length &&
 	    			exportableResource.getName().equals(pathSegments[moduleSegments.length > 0 ? moduleSegments.length : 0]))
     			if (((FlatFolder)exportableResource).members()!=null)
     				return getExistingModuleResource(Arrays.asList(((FlatFolder)exportableResource).members()),path);
     	}
     	return null;
     }

 	/**
 	 * @return True if beginningSegments[i] == testSegments[i] for all 0<=i<beginningSegments[i]
 	 */
 	private static boolean startsWith(String[] beginningSegments, String[] testSegments) {
 		for(int i=0; i < beginningSegments.length; i++) {
 			if(!beginningSegments[i].equals(testSegments[i]))
 				return false;
 		}
 		return true;
 	}

 	public static IFlatFolder ensureParentExists(List<IFlatResource> members, IPath path, IContainer cc) {
 		IFlatFolder parent = (IFlatFolder) getExistingModuleResource(members, path);
 		if (parent == null && path.segmentCount() > 0) {
 			String folderName = path.lastSegment();
 			IPath folderPath = Path.EMPTY;
 			if (path.segmentCount()>1)
 				folderPath = path.removeLastSegments(1);
 			parent = new FlatFolder(cc, folderName, folderPath);
 			if (path.segmentCount()>1)
 				addMembersToModuleFolder(ensureParentExists(members, path.removeLastSegments(1),cc), new IFlatResource[] {parent});
 			else
 				members.add(parent);
 		}
 		return parent;
 	}

 	/**
 	 * Add the resources from mr to the existing resources in Module Folder mf
 	 * @param ModuleFolder mf
 	 * @param IModuleResource[] mr
 	 */
 	public static void addMembersToModuleFolder(IFlatFolder mf, IFlatResource[] mr) {
 		// If the folder is null or the resources to add are null or empty, bail and return
 		if (mf == null || mr == null || mr.length==0)
 			return;
 		// Get the existing members in the module folder
 		IFlatResource[] mf_members = mf.members();
 		int mf_size = 0;
 		// Get the length of the existing members in the module folder
 		if (mf_members != null)
 			mf_size = mf_members.length;
 		// Create a new array to set on the module folder which will combine the existing and
 		// new module resources
 		IFlatResource[] res = new FlatResource[mf_size + mr.length];
 		// Copy the existing members into the array if there are any
 		if (mf_members != null && mf_size > 0)
 			System.arraycopy(mf_members, 0, res, 0, mf_size);
 		// Copy the new members into the array
 		System.arraycopy(mr, 0, res, mf_size, mr.length);
 		// Set the new members array on the module folder
 		mf.setMembers(res);
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2009 Red Hat 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:
	* Red Hat - Initial API and implementation
	*******************************************************************************/
	package org.eclipse.wst.common.componentcore.internal.flat;

	import java.io.File;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Iterator;
	import java.util.List;

	import org.eclipse.core.resources.IContainer;
	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IAdaptable;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
	import org.eclipse.wst.common.componentcore.resources.IVirtualContainer;
	import org.eclipse.wst.common.componentcore.resources.IVirtualResource;

	/**
	* This utility class is almost entirely copied from ComponentDeployable
	* and deals with the nuts and bolts of creating the model objects when
	* walking a portion of the tree
	*/
	public class VirtualComponentFlattenUtility {
	public static interface ShouldIncludeUtilityCallback {
	public boolean shouldAddComponentFile(IVirtualComponent current, IFlatFile file);
	}

	private List<IFlatResource> members;
	private ShouldIncludeUtilityCallback handler;
	public VirtualComponentFlattenUtility(
	List<IFlatResource> members, ShouldIncludeUtilityCallback handler) {
	this.members = members;
	this.handler = handler;
	}

	public void addMembers(IVirtualComponent current, IVirtualContainer cont, IPath path) throws CoreException {
	ensureParentExists(members, path, null);
	FlatResource[] mr = addMembersInternal(current, cont, path);
	int size = mr.length;
	for (int j = 0; j < size; j++) {
	members.add(mr[j]);
	}
	}

	// Add this container's children
	public void addContainer(IContainer container, IPath path) throws CoreException {
	IResource[] children = container.members();
	for( int i = 0; i < children.length; i++ ) {
	if( children[i] instanceof IContainer ) {
	addContainerInternal((IContainer)children[i], path);
	} else if( children[i] instanceof IFile ){
	addFile(null, (IFile)children[i], path);
	}
	}
	}

	// Physically adds this container
	protected void addContainerInternal(IContainer container, IPath path) throws CoreException {
	IFlatFolder mf = (FlatFolder) getExistingModuleResource(members,path.append(container.getName()).makeRelative());
	if( mf == null ) {
	mf = new FlatFolder(container, container.getName(), path);
	IFlatFolder parent = (FlatFolder) getExistingModuleResource(members, path);
	if (path.isEmpty())
	members.add(mf);
	else {
	if (parent == null)
	parent = ensureParentExists(members, path, container);
	addMembersToModuleFolder(parent, new IFlatResource[] {mf});
	}
	}
	// recurse
	addContainer(container, path.append(container.getName()));
	}

	protected FlatResource[] addMembersInternal(IVirtualComponent current, IVirtualContainer cont, IPath path) throws CoreException {
	IVirtualResource[] res = cont.members();
	int size2 = res.length;
	List list = new ArrayList(size2);
	for (int j = 0; j < size2; j++) {
	if (res[j] instanceof IVirtualContainer) {
	IVirtualContainer cc = (IVirtualContainer) res[j];
	IFlatFolder mf = addVirtualContainerInternal(cc, path);
	IFlatResource[] mr = addMembersInternal(current, cc, path.append(cc.getName()));
	addMembersToModuleFolder(mf, mr);
	} else {
	addFile(current, path, (IAdaptable)res[j]);
	}
	}
	FlatResource[] mr = new FlatResource[list.size()];
	list.toArray(mr);
	return mr;
	}

	public void addFile(IVirtualComponent current, IPath path, IAdaptable file) {
	IFile f = (IFile)file.getAdapter(IFile.class);
	IFlatFile mf = null;
	if( f != null )
	mf = createModuleFile(f, path.makeRelative());
	else {
	File f2 = (File)file.getAdapter(File.class);
	if( f2 != null )
	mf = new FlatFile(f2, f2.getName(), path.makeRelative());
	}
	if( mf != null ) {
	if (handler == null \|\| handler.shouldAddComponentFile(current, mf)) {
	if( mf.getModuleRelativePath().isEmpty()) {
	members.remove(mf);
	members.add(mf);
	}
	else {
	IFlatFolder moduleParent = VirtualComponentFlattenUtility.ensureParentExists(members, mf.getModuleRelativePath(), null);
	List tempParentMembers = new ArrayList(Arrays.asList(moduleParent.members()));
	tempParentMembers.remove(mf);
	tempParentMembers.add(mf);
	moduleParent.setMembers((IFlatResource[]) tempParentMembers.toArray(new IFlatResource[tempParentMembers.size()]));
	}
	}
	}
	}

	public void addFile(IVirtualComponent current, IFile f, IPath path) {
	addFile(current, path, (IAdaptable)f);
	}

	protected IFlatFolder addVirtualContainerInternal(IVirtualContainer cc, IPath path) {
	// Retrieve already existing module folder if applicable
	IFlatFolder mf = (FlatFolder) getExistingModuleResource(members,path.append(cc.getName()).makeRelative());
	if (mf == null) {
	mf = new FlatFolder((IContainer)cc.getUnderlyingResource(), cc.getName(), path);
	IFlatFolder parent = (FlatFolder) getExistingModuleResource(members, path);
	if (path.isEmpty())
	members.add(mf);
	else {
	if (parent == null)
	parent = ensureParentExists(members, path, (IContainer)cc.getUnderlyingResource());
	addMembersToModuleFolder(parent, new IFlatResource[] {mf});
	}
	}
	return mf;
	}

	public static FlatFile createModuleFile(final IFile file, final IPath path) {
	return new FlatFile(file, file.getName(), path);
	}


	/**
	* Check the current cache to see if we already have an existing module resource for
	* the given path.
	* @param aList
	* @param path
	* @return an existing moduleResource from the cached result
	*/

	public static FlatResource getExistingModuleResource(List aList, IPath path) {
	// If the list is empty, return null
	if (aList==null \|\| aList.isEmpty() \|\| path == null)
	return null;
	// Otherwise recursively check to see if given resource matches current resource or if it is a child
	String[] pathSegments = path.segments();
	FlatResource exportableResource = null;

	if(pathSegments.length == 0)
	return null;
	for (Iterator iter = aList.iterator(); iter.hasNext();) {
	exportableResource = (FlatResource) iter.next();
	String[] moduleSegments = exportableResource.getModuleRelativePath().segments();
	// If the last segment in passed in path equals the module resource name
	// and segment count is the same and the path segments start with the module path segments
	// then we have a match and we return the existing moduleResource
	if (pathSegments[pathSegments.length - 1].equals(exportableResource.getName()) &&
	(moduleSegments.length + 1) == pathSegments.length &&
	startsWith(moduleSegments, pathSegments))
	return exportableResource;

	// Otherwise, if it is a folder, check its children for the existing resource path
	// but only check if the beginning segments are a match
	if(exportableResource instanceof FlatFolder &&
	startsWith(moduleSegments, pathSegments) && pathSegments.length > moduleSegments.length &&
	exportableResource.getName().equals(pathSegments[moduleSegments.length > 0 ? moduleSegments.length : 0]))
	if (((FlatFolder)exportableResource).members()!=null)
	return getExistingModuleResource(Arrays.asList(((FlatFolder)exportableResource).members()),path);
	}
	return null;
	}

	/**
	* @return True if beginningSegments[i] == testSegments[i] for all 0<=i<beginningSegments[i]
	*/
	private static boolean startsWith(String[] beginningSegments, String[] testSegments) {
	for(int i=0; i < beginningSegments.length; i++) {
	if(!beginningSegments[i].equals(testSegments[i]))
	return false;
	}
	return true;
	}

	public static IFlatFolder ensureParentExists(List<IFlatResource> members, IPath path, IContainer cc) {
	IFlatFolder parent = (IFlatFolder) getExistingModuleResource(members, path);
	if (parent == null && path.segmentCount() > 0) {
	String folderName = path.lastSegment();
	IPath folderPath = Path.EMPTY;
	if (path.segmentCount()>1)
	folderPath = path.removeLastSegments(1);
	parent = new FlatFolder(cc, folderName, folderPath);
	if (path.segmentCount()>1)
	addMembersToModuleFolder(ensureParentExists(members, path.removeLastSegments(1),cc), new IFlatResource[] {parent});
	else
	members.add(parent);
	}
	return parent;
	}

	/**
	* Add the resources from mr to the existing resources in Module Folder mf
	* @param ModuleFolder mf
	* @param IModuleResource[] mr
	*/
	public static void addMembersToModuleFolder(IFlatFolder mf, IFlatResource[] mr) {
	// If the folder is null or the resources to add are null or empty, bail and return
	if (mf == null \|\| mr == null \|\| mr.length==0)
	return;
	// Get the existing members in the module folder
	IFlatResource[] mf_members = mf.members();
	int mf_size = 0;
	// Get the length of the existing members in the module folder
	if (mf_members != null)
	mf_size = mf_members.length;
	// Create a new array to set on the module folder which will combine the existing and
	// new module resources
	IFlatResource[] res = new FlatResource[mf_size + mr.length];
	// Copy the existing members into the array if there are any
	if (mf_members != null && mf_size > 0)
	System.arraycopy(mf_members, 0, res, 0, mf_size);
	// Copy the new members into the array
	System.arraycopy(mr, 0, res, mf_size, mr.length);
	// Set the new members array on the module folder
	mf.setMembers(res);
	}

	}