/*
 * Autopsy Forensic Browser
 *
 * Copyright 2011 Basis Technology Corp.
 * Contact: carrier <at> sleuthkit <dot> org
 *
 * 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.sleuthkit.autopsy.datamodel;

import java.util.Collection;
import java.util.Collections;
import org.sleuthkit.datamodel.BlackboardArtifact;

/**
 * Children implementation for the root node of a ContentNode tree. Accepts a
 * list of root Content objects for the tree.
 */
public class RootContentChildren extends AbstractContentChildren<Object> {

    private Collection<? extends Object> contentKeys;

    /**
     * @param contentKeys root Content objects for the Node tree
     */
    public RootContentChildren(Collection<? extends Object> contentKeys) {
        super();
        this.contentKeys = contentKeys;
    }

    @Override
    protected void addNotify() {
        setKeys(contentKeys);
    }

    @Override
    protected void removeNotify() {
        setKeys(Collections.<Object>emptySet());
    }

    /**
     * Refresh all content keys This creates new nodes of keys have changed.
     *
     * TODO ideally, nodes would respond to event from wrapped content object
     * but we are not ready for this.
     */
    public void refreshContentKeys() {
        for (Object key : contentKeys) {
            refreshKey(key);
        }
    }
}