org.apache.hadoop.hive.ql.udf.xml.TestUDFXPathUtil.java Source code

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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.udf.xml;

import javax.xml.xpath.XPathConstants;

import org.apache.commons.io.FileUtils;
import org.junit.Test;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import static org.junit.Assert.*;

import java.io.File;

public class TestUDFXPathUtil {

    @Test
    public void testEvalIllegalArgs() {
        UDFXPathUtil util = new UDFXPathUtil();

        // null args:
        assertNull(util.eval(null, "a/text()", XPathConstants.STRING));
        assertNull(util.eval("<a><b>b1</b><b>b2</b><b>b3</b><c>c1</c><c>c2</c></a>", null, XPathConstants.STRING));
        assertNull(util.eval("<a><b>b1</b><b>b2</b><b>b3</b><c>c1</c><c>c2</c></a>", "a/text()", null));

        // empty String args: 
        assertNull(util.eval("", "a/text()", XPathConstants.STRING));
        assertNull(util.eval("<a><b>b1</b><b>b2</b><b>b3</b><c>c1</c><c>c2</c></a>", "", XPathConstants.STRING));

        // wrong expression:
        assertNull(util.eval("<a><b>b1</b><b>b2</b><b>b3</b><c>c1</c><c>c2</c></a>", "a/text(",
                XPathConstants.STRING));
    }

    @Test
    public void testEvalPositive() {
        UDFXPathUtil util = new UDFXPathUtil();

        Object result = util.eval("<a><b>b1</b><b>b2</b><b>b3</b><c>c1</c><c>c2</c></a>", "a/c[2]/text()",
                XPathConstants.STRING);
        assertEquals("c2", result);

        result = util.evalBoolean("<a><b>true</b><b>false</b><b>b3</b><c>c1</c><c>c2</c></a>", "a/b[1]/text()");
        assertEquals(Boolean.TRUE, result);
        result = util.evalBoolean("<a><b>true</b><b>false</b><b>b3</b><c>c1</c><c>c2</c></a>", "a/b[4]");
        assertEquals(Boolean.FALSE, result);

        result = util.evalString("<a><b>true</b><b>false</b><b>b3</b><c>c1</c><c>c2</c></a>", "a/b[3]/text()");
        assertEquals("b3", result);
        result = util.evalString("<a><b>true</b><b>false</b><b>b3</b><c>c1</c><c>c2</c></a>", "a/b[4]/text()");
        assertEquals("", result);
        result = util.evalString("<a><b>true</b><b k=\"foo\">FALSE</b><b>b3</b><c>c1</c><c>c2</c></a>",
                "a/b[2]/@k");
        assertEquals("foo", result);

        result = util.evalNumber("<a><b>true</b><b>false</b><b>b3</b><c>c1</c><c>-77</c></a>", "a/c[2]");
        assertEquals(-77.0d, result);
        result = util.evalNumber("<a><b>true</b><b k=\"foo\">FALSE</b><b>b3</b><c>c1</c><c>c2</c></a>",
                "a/b[2]/@k");
        assertEquals(Double.NaN, result);

        result = util.evalNode("<a><b>true</b><b>false</b><b>b3</b><c>c1</c><c>-77</c></a>", "a/c[2]");
        assertNotNull(result);
        assertTrue(result instanceof Node);

        result = util.evalNodeList("<a><b>true</b><b>false</b><b>b3</b><c>c1</c><c>-77</c></a>", "a/*");
        assertNotNull(result);
        assertTrue(result instanceof NodeList);
        assertEquals(5, ((NodeList) result).getLength());
    }

    @Test
    public void testEmbedFailure() throws Exception {

        String secretValue = String.valueOf(Math.random());
        File tempFile = File.createTempFile("verifyembed", ".tmp");
        tempFile.deleteOnExit();
        String fname = tempFile.getAbsolutePath();

        FileUtils.writeStringToFile(tempFile, secretValue);

        String xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" + "<!DOCTYPE test [ \n"
                + "    <!ENTITY embed SYSTEM \"" + fname + "\"> \n" + "]>\n" + "<foo>&embed;</foo>";
        String evaled = new UDFXPathUtil().evalString(xml, "/foo");
        assertTrue(evaled.isEmpty());
    }
}