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Empowering Model Driven Architecture in J2EE applications

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/**
 * XOR, empowering Model Driven Architecture in J2EE applications
 *
 * Copyright (c) 2012, Dilip Dalton
 *
 * 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 tools.xor.view;

public class UnmodifiableJoin extends Join
{
    private Join join;

    public UnmodifiableJoin(Join join) {
        this.join = join;
    }

    private void raiseException ()
    {
        throw new UnsupportedOperationException(
            "Changes are not allowed on the join, make a copy of the view to make necessary changes.");
    }

    @Override
    public String getEntity() {
        return join.getEntity();
    }

    @Override
    public void setEntity (String entity)
    {
        raiseException();
    }

}