/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.netbeans.api.java.classpath;

import java.util.EventObject;
import java.util.Set;

/**
 * Event object giving details of a change in the path registry.
 */
public final class GlobalPathRegistryEvent extends EventObject {

    private final String id;
    private final Set<ClassPath> changed;

    GlobalPathRegistryEvent(GlobalPathRegistry r, String id, Set<ClassPath> changed) {
        super(r);
        assert id != null;
        assert changed != null && !changed.isEmpty();
        this.id = id;
        this.changed = changed;
    }

    /**
     * Get the affected registry.
     * @return the registry
     */
    public GlobalPathRegistry getRegistry() {
        return (GlobalPathRegistry)getSource();
    }

    /**
     * Get the type of classpaths that were added or removed.
     * @return the type, e.g. {@link ClassPath#SOURCE}
     */
    public String getId() {
        return id;
    }

    /**
     * Get a set of classpaths that were added or removed.
     * @return an immutable and nonempty set of {@link ClassPath}s of the given type
     */
    public Set<ClassPath> getChangedPaths() {
        return changed;
    }

}
