/*
* Copyright (c) 2011. The Apache Software Foundation
*
* 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.expreval.expr.stringpattern;
import org.apache.expreval.client.NullColumnValueException;
import org.apache.expreval.client.ResultMissingColumnException;
import org.apache.expreval.expr.node.GenericValue;
import org.apache.hadoop.hbase.hbql.client.HBqlException;
import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class LikeStmt extends GenericStringPatternStmt {
private Pattern pattern = null;
public LikeStmt(final GenericValue arg0, final boolean not, final GenericValue arg1) {
super(arg0, not, arg1);
}
private Pattern getPattern() {
return this.pattern;
}
protected String getFunctionName() {
return "LIKE";
}
public Boolean getValue(final HConnectionImpl conn, final Object object) throws HBqlException,
ResultMissingColumnException,
NullColumnValueException {
final String val = (String)this.getExprArg(0).getValue(conn, object);
if (val == null)
throw new HBqlException("Null string for value in " + this.asString());
final boolean patternConstant = this.getExprArg(1).isAConstant();
if (!patternConstant || this.getPattern() == null) {
final String pvalue = (String)this.getExprArg(1).getValue(conn, object);
if (pvalue == null)
throw new HBqlException("Null string for pattern in " + this.asString());
this.pattern = Pattern.compile(pvalue);
}
final Matcher m = this.getPattern().matcher(val);
final boolean retval = m.matches();
return (this.isNot()) ? !retval : retval;
}
}