/*
 * Copyright Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags and
 * the COPYRIGHT.txt file distributed with this work.
 *
 * 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.teiid.query.sql.lang;

import org.teiid.core.TeiidRuntimeException;
import org.teiid.core.util.EquivalenceUtil;
import org.teiid.query.sql.symbol.Expression;

public class ImmutableCompareCriteria extends CompareCriteria {
    
    public ImmutableCompareCriteria(Expression leftExpression, int operator, Expression rightExpression) {
        super.setLeftExpression(leftExpression);
        super.setOperator(operator);
        super.setRightExpression(rightExpression);
    }
    
    @Override
    public void setLeftExpression(Expression expression) {
        if (!EquivalenceUtil.areEqual(expression, getLeftExpression())) {
            throw new TeiidRuntimeException("Attempt to modify immutable object"); //$NON-NLS-1$
        }
    }
    
    @Override
    public void setRightExpression(Expression expression) {
        if (!EquivalenceUtil.areEqual(expression, getRightExpression())) {
            throw new TeiidRuntimeException("Attempt to modify immutable object"); //$NON-NLS-1$
        }
    }
    
    public void setOperator(int operator) {
        if (!EquivalenceUtil.areEqual(operator, getOperator())) {
            throw new TeiidRuntimeException("Attempt to modify immutable object"); //$NON-NLS-1$
        }
    };
    
    @Override
    public void setOptional(Boolean isOptional) {
        
    }

}
