algebricks/algebricks-examples/piglet-example/src/main/java/edu/uci/ics/hyracks/algebricks/examples/piglet/ast/FilterNode.java

/*
 * Copyright 2009-2013 by The Regents of the University of California
 * 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 from
 * 
 *     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 edu.uci.ics.hyracks.algebricks.examples.piglet.ast;

public class FilterNode extends RelationNode {
    private String alias;

    private ExpressionNode expression;

    public FilterNode(String alias, ExpressionNode expression) {
        this.alias = alias;
        this.expression = expression;
    }

    @Override
    public Tag getTag() {
        return Tag.FILTER;
    }

    public String getAlias() {
        return alias;
    }

    public ExpressionNode getExpression() {
        return expression;
    }
}