phoenix-core/src/main/java/org/apache/phoenix/parse/LimitNode.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.phoenix.parse;


public class LimitNode {
    private final BindParseNode bindNode;
    private final LiteralParseNode limitNode;
    
    LimitNode(BindParseNode bindNode) {
        this.bindNode = bindNode;
        limitNode = null;
    }
    
    LimitNode(LiteralParseNode limitNode) {
        this.limitNode = limitNode;
        this.bindNode = null;
    }
    
    public ParseNode getLimitParseNode() {
        return bindNode == null ? limitNode : bindNode;
    }
    
    @Override
    public String toString() {
        return bindNode == null ? limitNode.toString() : bindNode.toString();
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((bindNode == null) ? 0 : bindNode.hashCode());
        result = prime * result + ((limitNode == null) ? 0 : limitNode.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;
        LimitNode other = (LimitNode)obj;
        if (bindNode == null) {
            if (other.bindNode != null) return false;
        } else if (!bindNode.equals(other.bindNode)) return false;
        if (limitNode == null) {
            if (other.limitNode != null) return false;
        } else if (!limitNode.equals(other.limitNode)) return false;
        return true;
    }
}