org.ow2.util.archive.impl.ArchiveMetadataImpl Maven / Gradle / Ivy

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/**
 * Copyright 2007-2012 Bull S.A.S.
 *
 * 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.ow2.util.archive.impl;

import java.util.HashMap;
import java.util.Map;

import org.ow2.util.archive.api.IArchiveMetadata;

/**
 * Implementation of the metadata interface of an archive. 

 * The keys are all in tolower case. This is because the attributes in a
 * manifest are case-insensitive
 * @see java.util.jar.Attributes class
 * @author Florent BENOIT
 */
public class ArchiveMetadataImpl implements IArchiveMetadata {

    /**
     * Map that will store the entries.
     */
    private Map entries;

    /**
     * Default constructor.
     */
    public ArchiveMetadataImpl() {
        // init the map
        this.entries = new HashMap();
    }

    /**
     * Gets the value of an entry for the given name.
     * @param name the name of the key to use.
     * @return the value
     */
    public String get(final String name) {
        if (name == null) {
            return null;
        }
        return entries.get(name.toLowerCase());
    }

    /**
     * @return the value of the implementation version of this archive.
     */
    public String getImplementationVersion() {
        return entries.get(java.util.jar.Attributes.Name.IMPLEMENTATION_VERSION.toString().toLowerCase());
    }

    /**
     * Adds an entry into this metadata.
     * @param name the name of the key to add
     * @param value the value of the given key
     */
    public void put(final String name, final String value) {
        if (name == null) {
            return;
        }
        entries.put(name.toLowerCase(), value);
    }
}