/*
 * Copyright 2010-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Portions copyright 2006-2009 James Murty. Please see LICENSE.txt
 * for applicable license terms and NOTICE.txt for applicable notices.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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 com.amazonaws.services.s3.model;

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

public class TagSet {
    private Map<String, String> tags;

    /**
     * <p>
     * Creates a new empty TagSet.
     * </p>
     *
     * @see TagSet#TagSet(Map)
     */
    public TagSet() {
        this.tags = new HashMap<String, String>(1);
    }

    /**
     * <p>
     * Creates a new TagSet with the set of tags defined.
     * </p>
     *
     * @param tags A key/value mapping of tags to store in this
     *            <code>TagSet</code>
     */
    public TagSet(Map<String, String> tags) {
        this.tags = new HashMap<String, String>(1);
        this.tags.putAll(tags);
    }

    /**
     * <p>
     * Get the value of the tag with the given key.
     * </p>
     *
     * @param key The key of the tag to return
     * @return The value of the given tag. Will return null if no tag by the
     *         given key exists.
     */
    public String getTag(String key) {
        return tags.get(key);
    }

    /**
     * <p>
     * Sets the value of the tag for a given key. Will overwrite existing value.
     * </p>
     *
     * @param key The key for the tag
     * @param value The value for the tag
     */
    public void setTag(String key, String value) {
        tags.put(key, value);
    }

    /**
     * <p>
     * Get all the tags for this <code>TagSet</code>
     * </p>
     *
     * @return A map of key/value for all tags
     */
    public Map<String, String> getAllTags() {
        return tags;
    }

    @Override
    public String toString() {
        StringBuffer sb = new StringBuffer();
        sb.append("{");
        sb.append("Tags: " + this.getAllTags());
        sb.append("}");
        return sb.toString();
    }
}