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/tags/release-0.1-rc2/hive/external/ql/src/java/org/apache/hadoop/hive/ql/udf/xml/UDFXPathLong.java

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Java | 37 lines | 15 code | 5 blank | 17 comment | 0 complexity | fc7e52cbf8bf1bac4213cdb836747097 MD5 | raw file
 1/**
 2 * Licensed to the Apache Software Foundation (ASF) under one
 3 * or more contributor license agreements.  See the NOTICE file
 4 * distributed with this work for additional information
 5 * regarding copyright ownership.  The ASF licenses this file
 6 * to you under the Apache License, Version 2.0 (the
 7 * "License"); you may not use this file except in compliance
 8 * with the License.  You may obtain a copy of the License at
 9 *
10 *     http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19package org.apache.hadoop.hive.ql.udf.xml;
20
21import org.apache.hadoop.hive.ql.exec.Description;
22import org.apache.hadoop.hive.ql.exec.UDF;
23
24@Description(
25    name = "xpath_long",
26    value = "_FUNC_(xml, xpath) - Returns a long value that matches the xpath expression",
27    extended = "Example:\n"
28    + "  > SELECT _FUNC_('<a><b>1</b><b>2</b></a>','sum(a/b)') FROM src LIMIT 1;\n"
29    + "  3")
30public class UDFXPathLong extends UDF {
31
32  private final UDFXPathUtil xpath = new UDFXPathUtil();
33
34  public long evaluate(String xml, String path) {
35    return xpath.evalNumber(xml, path).longValue();
36  }
37}