MapEntryParameter.java

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2000-2005
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: MapEntryParameter.java,v 12.1 2005/01/31 19:27:32 mark Exp $
 */

package com.sleepycat.collections;

import java.util.Map;

public class MapEntryParameter implements Map.Entry {

    private Object key;
    private Object value;

    public MapEntryParameter(Object key, Object value) {

        this.key = key;
        this.value = value;
    }

    public int hashCode() {

        return ((key == null)    ? 0 : key.hashCode()) ^
               ((value == null)  ? 0 : value.hashCode());
    }

    public boolean equals(Object other) {

        if (!(other instanceof Map.Entry)) {
            return false;
        }

        Map.Entry e = (Map.Entry) other;

        return ((key == null) ? (e.getKey() == null)
                              : key.equals(e.getKey())) &&
               ((value == null) ? (e.getValue() == null)
                                : value.equals(e.getValue()));
    }

    public final Object getKey() {

        return key;
    }

    public final Object getValue() {

        return value;
    }

    public Object setValue(Object newValue) {

        throw new UnsupportedOperationException();
    }

    final void setValueInternal(Object newValue) {

        this.value = newValue;
    }

    public String toString() {

        return "[key [" + key + "] value [" + value + ']';
    }
}

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