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/*
 * Copyright 2014 - 2020 Blazebit.
 *
 * 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 com.blazebit.persistence.impl;

import com.blazebit.persistence.parser.expression.Expression;
import com.blazebit.persistence.parser.expression.modifier.ExpressionModifier;

/**
 *
 * @author Moritz Becker
 * @author Christian Beikov
 * @since 1.0.0
 */
public class NodeInfo implements ExpressionModifier {

    private Expression expression;

    public NodeInfo(Expression expression) {
        this.expression = expression;
    }

    public Expression getExpression() {
        return expression;
    }

    public void setExpression(Expression expression) {
        this.expression = expression;
    }

    @Override
    public void set(Expression expression) {
        this.expression = expression;
    }

    @Override
    public Expression get() {
        return expression;
    }

    @Override
    public NodeInfo clone() {
        return new NodeInfo(expression);
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((expression == null) ? 0 : expression.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        NodeInfo other = (NodeInfo) obj;
        if (expression == null) {
            if (other.expression != null) {
                return false;
            }
        } else if (!expression.equals(other.expression)) {
            return false;
        }
        return true;
    }

}




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