/**
 * Copyright 2010 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.drools.agent;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;

import org.drools.rule.Package;

/**
 * Contains the changes to packages.
 * 
 * @author Toni Rikkola
 * 
 */
class PackageChangeInfo {

	private Collection<Package> changedPackages;
	private Collection<String> removedPackages;

	void addPackage(Package p) {

		if (changedPackages == null) {
			changedPackages = new ArrayList<Package>();
		}

		changedPackages.add(p);
	}

	void addRemovedPackages(Collection<String> removedPackages) {

		for (String name : removedPackages) {
			addRemovedPackage(name);
		}

	}

	Collection<Package> getChangedPackages() {
		if (changedPackages != null) {
			return changedPackages;
		} else {
			return Collections.emptyList();
		}
	}

	Collection<String> getRemovedPackages() {
		if (removedPackages != null) {
			return removedPackages;
		} else {
			return Collections.emptyList();
		}
	}

	void addRemovedPackage(String name) {

		if (removedPackages == null) {
			removedPackages = new ArrayList<String>();
		}

		removedPackages.add(name);
	}
}