/*******************************************************************************
 * Copyright (c) 2003, 2006 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.jst.j2ee.internal.web.operations;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.eclipse.jdt.core.IClasspathEntry;

public class ClasspathUtilities {

	static public IClasspathEntry[] addClasspathEntries(IClasspathEntry[] entries1, IClasspathEntry[] entries2) {
		List list = new ArrayList(entries1.length + entries2.length);
		list.addAll(Arrays.asList(entries1));

		for (int i = 0; i < entries2.length; i++) {
			IClasspathEntry iClasspathEntry = entries2[i];
			if (!list.contains(iClasspathEntry))
				list.add(iClasspathEntry);
		}

		IClasspathEntry[] ret = new IClasspathEntry[list.size()];
		return (IClasspathEntry[]) list.toArray(ret);
	}

	static protected boolean entryExists(IClasspathEntry entry, IClasspathEntry[] col) {
		for (int i = 0; i < col.length; i++) {
			IClasspathEntry otherEntry = col[i];
			if (entry.getContentKind() != otherEntry.getContentKind())
				continue;

			if (entry.getEntryKind() != otherEntry.getEntryKind())
				continue;

			if (entry.isExported() != otherEntry.isExported())
				continue;

			if (!entry.getPath().equals(otherEntry.getPath()))
				continue;
			return true;
		}
		return false;
	}

	static public IClasspathEntry[] removeClasspathEntries(IClasspathEntry[] removeFromCol, IClasspathEntry[] removeCol) {
		List list = new ArrayList(removeFromCol.length);
		//		list.addAll(Arrays.asList(removeFromCol));

		for (int i = 0; i < removeFromCol.length; i++) {
			IClasspathEntry iClasspathEntry = removeFromCol[i];
			if (!entryExists(iClasspathEntry, removeCol))
				list.add(iClasspathEntry);
		}

		IClasspathEntry[] ret = new IClasspathEntry[list.size()];
		return (IClasspathEntry[]) list.toArray(ret);
	}

}