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Artifact for mixins of general interest.
There is a newer version: 3.3.8
// /////////////////////////////////////////////////////////////////////////////
// REFCODES.ORG
// =============================================================================
// This code is copyright (c) by Siegfried Steiner, Munich, Germany and licensed
// under the following (see "http://en.wikipedia.org/wiki/Multi-licensing")
// licenses:
// =============================================================================
// GNU General Public License, v3.0 ("http://www.gnu.org/licenses/gpl-3.0.html")
// together with the GPL linking exception applied; as being applied by the GNU
// Classpath ("http://www.gnu.org/software/classpath/license.html")
// =============================================================================
// Apache License, v2.0 ("http://www.apache.org/licenses/LICENSE-2.0")
// =============================================================================
// Please contact the copyright holding author(s) of the software artifacts in
// question for licensing issues not being covered by the above listed licenses,
// also regarding commercial licensing models or regarding the compatibility
// with other open source licenses.
// /////////////////////////////////////////////////////////////////////////////

package org.refcodes.mixin.mixins.impls;

import org.refcodes.mixin.mixins.AttributeAccessor;

/**
 * Key-to-value accessor needful in some cases.
 * 
 * @param  The generic key's type
 * @param  The generic value's type
 */
public class AttributeAccessorImpl implements AttributeAccessor {

	private K _key;
	private V _value;

	/**
	 * Constructs a key-to-value accessor.
	 * 
	 * @param aKey The key for the key-value property.
	 * @param aValue The value for the key-value property.
	 */
	public AttributeAccessorImpl( K aKey, V aValue ) {
		_key = aKey;
		_value = aValue;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public K getKey() {
		return _key;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public V getValue() {
		return _value;
	}

	/**
	 * Key-to-value mutator needful in some cases.
	 * 
	 * @param  The generic key's type
	 * @param  The generic value's type
	 */
	public class AttributeMutatorImpl implements AttributeMutator {

		/**
		 * {@inheritDoc}
		 */
		@Override
		public void setKey( K aKey ) {
			_key = aKey;
		}

		/**
		 * {@inheritDoc}
		 */
		@Override
		public void setValue( V aValue ) {
			_value = aValue;
		}
	}

	/**
	 * Key-to-value property needful in some cases.
	 * 
	 * @param  The generic key's type
	 * @param  The generic value's type
	 */
	public class AttributePropertyImpl extends AttributeAccessorImpl implements AttributeMutator {

		/**
		 * {@inheritDoc}
		 */
		public AttributePropertyImpl( K aKey, V aValue ) {
			super( aKey, aValue );
		}

		/**
		 * {@inheritDoc}
		 */
		@Override
		public void setKey( K aKey ) {
			_key = aKey;
		}

		/**
		 * {@inheritDoc}
		 */
		@Override
		public void setValue( V aValue ) {
			_value = aValue;
		}
	}
}