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'databene commons' is an open source Java library by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * 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.databene.commons.visitor;

import org.databene.commons.Visitor;

/**
 * Element implementation that serves as proxy for another Element.
 * Created: 04.02.2007 08:17:20
 * @param  The type of the wrapped element
 * @author Volker Bergmann
 */
public abstract class WrapperElement extends AbstractElement {

    protected E wrappedObject;

    protected WrapperElement(E wrappedObject) {
        this.wrappedObject = wrappedObject;
    }

    public E getWrappedObject() {
        return wrappedObject;
    }

    @Override
    protected void acceptImpl(Visitor visitor) {
        visitor.visit(wrappedObject);
    }

    @SuppressWarnings("rawtypes")
	@Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (o == null || getClass() != o.getClass())
            return false;
		final WrapperElement that = (WrapperElement) o;
        return !(wrappedObject != null ? !wrappedObject.equals(that.wrappedObject) : that.wrappedObject != null);
    }

    @Override
    public int hashCode() {
        return (wrappedObject != null ? wrappedObject.hashCode() : 0);
    }

    @Override
    public String toString() {
        return wrappedObject.toString();
    }
}