Key.java

/*
 * ====================================================================
 * 
 * The ObjectStyle Group Software License, Version 1.0
 * 
 * Copyright (c) 2006 The ObjectStyle Group and individual authors of the
 * software. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * 
 * 3. The end-user documentation included with the redistribution, if any, must
 * include the following acknowlegement: "This product includes software
 * developed by the ObjectStyle Group (http://objectstyle.org/)." Alternately,
 * this acknowlegement may appear in the software itself, if and wherever such
 * third-party acknowlegements normally appear.
 * 
 * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse or
 * promote products derived from this software without prior written permission.
 * For written permission, please contact andrus@objectstyle.org.
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 * 5. Products derived from this software may not be called "ObjectStyle" nor
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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 * ====================================================================
 * 
 * This software consists of voluntary contributions made by many individuals on
 * behalf of the ObjectStyle Group. For more information on the ObjectStyle
 * Group, please see <http://objectstyle.org/>.
 *  
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package org.objectstyle.wolips.eomodeler.core.kvc;

public class Key implements IKey {
	private String myName;

	public Key(String _name) {
		myName = _name;
	}

	public ResolvedKey toResolvedKey(Class _declaringClass) {
		return new ResolvedKey(_declaringClass, myName);
	}

	public String getName() {
		return myName;
	}

	public Class getType(Object _instance) {
		IKey getMember = getGetMember(_instance);
		Class nextClass = getMember.getType(_instance);
		return nextClass;
	}

	protected Class getClass(Object _instance) {
		Class clazz;
		if (_instance == null) {
			clazz = null;
		} else {
			clazz = _instance.getClass();
		}
		return clazz;
	}

	protected IKey getSetMember(Object _instance) {
		IKey setMember;
		Class clazz = getClass(_instance);
		if (clazz == null) {
			setMember = null;
		} else {
			MemberContainer memberContainer = new MemberContainer(clazz, MemberContainer.SET);
			setMember = memberContainer.getMember(_instance, myName);
		}
		return setMember;
	}

	protected IKey getGetMember(Object _instance) {
		IKey getMember;
		Class clazz = getClass(_instance);
		if (clazz == null) {
			getMember = null;
		} else {
			MemberContainer memberContainer = new MemberContainer(clazz, MemberContainer.GET);
			getMember = memberContainer.getMember(_instance, myName);
		}
		return getMember;
	}

	public void setValue(Object _instance, Object _value) {
		IKey setMember = getSetMember(_instance);
		setMember.setValue(_instance, _value);
	}

	public Object getValue(Object _instance) {
		IKey getMember = getGetMember(_instance);
		Object value = getMember.getValue(_instance);
		return value;
	}

	public String toString() {
		return "[Key: " + myName + "]";
	}
}