org.apache.hadoop.hive.ql.exec.vector.expressions.ExtendedStringInitCap.java Source code

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Here is the source code for org.apache.hadoop.hive.ql.exec.vector.expressions.ExtendedStringInitCap.java

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/**
 * 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.hadoop.hive.ql.exec.vector.expressions;

import org.apache.commons.lang.WordUtils;
import org.apache.hadoop.io.Text;

/**
 * Returns str, with the first letter of each word in uppercase, all other letters in lowercase.
 * Words are delimited by white space. e.g. initcap('the soap') returns 'The Soap'
 * 
 * Extends {@link StringUnaryUDF}.
 * 
 * An original version is {@link org.apache.hadoop.hive.ql.exec.vector.expressions.StringInitCap},
 * this one extends functionality, using '-', ',', ' ' as word delimiters
 */
public class ExtendedStringInitCap extends StringUnaryUDF {
    private static final long serialVersionUID = 1L;

    public ExtendedStringInitCap(int colNum, int outputColumn) {
        super(colNum, outputColumn, new IUDFUnaryString() {

            Text t = new Text();

            @Override
            public Text evaluate(Text s) {
                if (s == null) {
                    return null;
                }
                t.set(WordUtils.capitalizeFully(s.toString(), new char[] { '-', ',', ' ' }));
                return t;
            }
        });
    }

    public ExtendedStringInitCap() {
        super();
    }
}