/**
* 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.lens.cube.parse;
import org.apache.hadoop.hive.ql.parse.ASTNode;
public class DefaultAliasDecider implements AliasDecider {
int counter = 0;
private static final String ALIAS_PREFIX = "alias";
final String aliasPrefix;
public DefaultAliasDecider(String alias) {
aliasPrefix = alias;
}
DefaultAliasDecider() {
this(ALIAS_PREFIX);
}
public String decideAlias(ASTNode node) {
if (node == null) {
throw new NullPointerException("Node cannot be null");
}
return aliasPrefix + (counter++);
}
}