/**
 * Copyright 2007-2016, Kaazing Corporation. All rights reserved.
 *
 * 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.apache.mina.core.session;

import java.io.Serializable;
import java.util.Map;

/**
 * A key that makes its parent {@link Map} or session attribute to search
 * fast while being debug-friendly by providing the string representation.
 *
 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
 */
public final class AttributeKey implements Serializable {
    /** The serial version UID */
    private static final long serialVersionUID = -583377473376683096L;
    
    /** The attribute's name */
    private final String name;

    /**
     * Creates a new instance. It's built from :
     * - the class' name
     * - the attribute's name
     * - this attribute hashCode
     */
    public AttributeKey(Class<?> source, String name) {
        this.name = source.getName() + '.' + name + '@' + Integer.toHexString(this.hashCode());
    }

    /**
     * The String representation of tis objection is its constructed name.
     */
    @Override
    public String toString() {
        return name;
    }
}
