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Commons Digester example source code file (SetNestedPropertiesRuleTestCase.java)
This example Commons Digester source code file (SetNestedPropertiesRuleTestCase.java) is included in the DevDaily.com
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The Commons Digester SetNestedPropertiesRuleTestCase.java source code
/* $Id: SetNestedPropertiesRuleTestCase.java 992060 2010-09-02 19:09:47Z simonetripodi $
*
* 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.commons.digester;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.fail;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.xml.sax.SAXException;
/**
* <p> Test case for SetNestedPropertiesRule .
* This contains tests for the main applications of the rule
* and two more general tests of digester functionality used by this rule.
*/
public class SetNestedPropertiesRuleTestCase {
// ----------------------------------------------------- Instance Variables
/**
* Simple test xml document used in the tests.
*/
protected final static String TEST_XML =
"<?xml version='1.0'?>" +
"<root>ROOT BODY" +
"<alpha>ALPHA BODY" +
"<beta>BETA BODY" +
"<gamma>GAMMA BODY" +
"<delta>DELTA BODY" +
"</root>";
/**
* The digester instance we will be processing.
*/
protected Digester digester = null;
// --------------------------------------------------- Overall Test Methods
/**
* Set up instance variables required by this test case.
*/
@Before
public void setUp() {
digester = new Digester();
}
/**
* Tear down instance variables required by this test case.
*/
@After
public void tearDown() {
digester = null;
}
// ------------------------------------------------ Individual Test Methods
/**
* Test that you can successfully automatically set properties.
*/
@Test
public void testAutomaticallySetProperties()
throws SAXException, IOException {
// going to be setting properties on a SimpleTestBean
digester.addObjectCreate("root",
"org.apache.commons.digester.SimpleTestBean");
// match all children of root with this rule
digester.addRule("root", new SetNestedPropertiesRule());
SimpleTestBean bean = (SimpleTestBean) digester.parse(xmlTestReader());
// check properties are set correctly
assertEquals(
"Property alpha not set correctly",
"ALPHA BODY",
bean.getAlpha());
assertEquals(
"Property beta not set correctly",
"BETA BODY",
bean.getBeta());
assertEquals(
"Property gamma not set correctly",
"GAMMA BODY",
bean.getGamma());
assertEquals(
"Property delta not set correctly",
"DELTA BODY",
bean.getDeltaValue());
}
/**
* Test that it is an error when a child element exists but no corresponding
* java property exists.
*/
@Test
public void testMandatoryProperties()
throws SAXException, IOException {
String TEST_XML =
"<?xml version='1.0'?>" +
"<root>ROOT BODY" +
"<badprop>ALPHA BODY" +
"</root>";
// going to be setting properties on a SimpleTestBean
digester.addObjectCreate("root",
"org.apache.commons.digester.SimpleTestBean");
// match all children of root with this rule
digester.addRule("root", new SetNestedPropertiesRule());
try {
SimpleTestBean bean = (SimpleTestBean) digester.parse(
new StringReader(TEST_XML));
// we should never get here...
fail("No exception thrown by parse when unknown child element found.");
assertNotNull(bean); // just to prevent compiler warning on unused var
} catch(org.xml.sax.SAXParseException e) {
String msg = e.getMessage();
if (msg.indexOf("badprop") >= 0) {
// ok, this is expected; there is no "setBadprop" method on the
// SimpleTestBean class...
} else {
fail("Unexpected parse exception:" + e.getMessage());
}
}
}
/**
* Test that you can customise the property mappings using the
* constructor which takes arrays-of-strings.
*/
@Test
public void testCustomisedProperties1()
throws SAXException, IOException {
String TEST_XML =
"<?xml version='1.0'?>" +
"<root>ROOT BODY" +
"<alpha>ALPHA BODY" +
"<beta>BETA BODY" +
"<gamma-alt>GAMMA BODY" +
"<delta>DELTA BODY" +
"</root>";
// going to be setting properties on a SimpleTestBean
digester.addObjectCreate("root",
"org.apache.commons.digester.SimpleTestBean");
// ignore the "alpha" element (target=null)
// don't remap the "beta" element
// map the gamma-alt element into the gamma property
// ignore the delta element (no matching element in array)
Rule rule = new SetNestedPropertiesRule(
new String[]{"alpha", "gamma-alt", "delta"},
new String[]{null, "gamma"});
digester.addRule("root", rule);
SimpleTestBean bean = (SimpleTestBean) digester.parse(
new StringReader(TEST_XML));
// check properties are set correctly
assertEquals(
"Property alpha was not ignored (it should be)",
null,
bean.getAlpha());
assertEquals(
"Property beta not set correctly",
"BETA BODY",
bean.getBeta());
assertEquals(
"Property gamma not set correctly",
"GAMMA BODY",
bean.getGamma());
assertEquals(
"Property delta was not ignored (it should be)",
null,
bean.getDeltaValue());
// check no bad rules object is left
assertEquals(
"Digester rules object not reset.",
RulesBase.class, digester.getRules().getClass());
}
/**
* Test that you can ignore a single input xml element using the
* constructor which takes a single remapping.
*/
@Test
public void testCustomisedProperties2a()
throws SAXException, IOException {
String TEST_XML =
"<?xml version='1.0'?>" +
"<root>ROOT BODY" +
"<alpha>ALPHA BODY" +
"<beta>BETA BODY" +
"<gamma>GAMMA BODY" +
"<delta>DELTA BODY" +
"</root>";
// going to be setting properties on a SimpleTestBean
digester.addObjectCreate("root",
"org.apache.commons.digester.SimpleTestBean");
// ignore the "alpha" element (target=null)
Rule rule = new SetNestedPropertiesRule("alpha", null);
digester.addRule("root", rule);
SimpleTestBean bean = (SimpleTestBean) digester.parse(
new StringReader(TEST_XML));
// check properties are set correctly
assertEquals(
"Property alpha was not ignored (it should be)",
null,
bean.getAlpha());
assertEquals(
"Property beta not set correctly",
"BETA BODY",
bean.getBeta());
assertEquals(
"Property gamma not set correctly",
"GAMMA BODY",
bean.getGamma());
assertEquals(
"Property delta not set correctly",
"DELTA BODY",
bean.getDeltaValue());
// check no bad rules object is left
assertEquals(
"Digester rules object not reset.",
RulesBase.class, digester.getRules().getClass());
}
/**
* Test that you can customise the property mappings using the
* constructor which takes a single remapping.
*/
@Test
public void testCustomisedProperties2b()
throws SAXException, IOException {
String TEST_XML =
"<?xml version='1.0'?>" +
"<root>ROOT BODY" +
"<alpha-alt>ALPHA BODY" +
"<beta>BETA BODY" +
"<gamma>GAMMA BODY" +
"<delta>DELTA BODY" +
"</root>";
// going to be setting properties on a SimpleTestBean
digester.addObjectCreate("root",
"org.apache.commons.digester.SimpleTestBean");
// map the contents of the alpha-alt xml child into the
// "alpha" java property.
Rule rule = new SetNestedPropertiesRule("alpha-alt", "alpha");
digester.addRule("root", rule);
SimpleTestBean bean = (SimpleTestBean) digester.parse(
new StringReader(TEST_XML));
// check properties are set correctly
assertEquals(
"Property alpha not set correctly",
"ALPHA BODY",
bean.getAlpha());
assertEquals(
"Property beta not set correctly",
"BETA BODY",
bean.getBeta());
assertEquals(
"Property gamma not set correctly",
"GAMMA BODY",
bean.getGamma());
assertEquals(
"Property delta not set correctly",
"DELTA BODY",
bean.getDeltaValue());
// check no bad rules object is left
assertEquals(
"Digester rules object not reset.",
RulesBase.class, digester.getRules().getClass());
}
/**
* Test that:
* <ul>
* <li> you can have rules matching the same pattern as the
* SetNestedPropertiesRule, </li>
* <li> you can have rules matching child elements of the rule,
* <li> the Rules object is reset nicely.
* </ul>
*/
@Test
public void testMultiRuleMatch()
throws SAXException, IOException {
String testXml =
"<?xml version='1.0'?>" +
"<root>" +
"<testbean alpha='alpha-attr'>ROOT BODY" +
"<beta>BETA BODY" +
"<gamma>GAMMA " +
"<prop name='delta' value='delta-prop'/>" +
"BODY" +
"</gamma>" +
"</testbean>" +
"</root>";
Reader reader = new StringReader(testXml);
// going to be setting properties on a SimpleTestBean
digester.addObjectCreate("root/testbean",
"org.apache.commons.digester.SimpleTestBean");
digester.addRule("root/testbean", new SetNestedPropertiesRule());
digester.addSetProperties("root/testbean");
digester.addSetProperty("root/testbean/gamma/prop", "name", "value");
SimpleTestBean bean = (SimpleTestBean) digester.parse(reader);
assertNotNull("No object created", bean);
// check properties are set correctly
assertEquals(
"Property alpha not set correctly",
"alpha-attr",
bean.getAlpha());
assertEquals(
"Property beta not set correctly",
"BETA BODY",
bean.getBeta());
assertEquals(
"Property gamma not set correctly",
"GAMMA BODY",
bean.getGamma());
assertEquals(
"Property delta not set correctly",
"delta-prop",
bean.getDeltaValue());
// check no bad rules object is left
assertEquals(
"Digester rules object not reset.",
RulesBase.class, digester.getRules().getClass());
}
/**
* Test that unknown child elements trigger an exception.
*/
@Test
public void testUnknownChildrenCausesException()
throws SAXException, IOException {
String testXml =
"<?xml version='1.0'?>" +
"<root>" +
"<testbean>" +
"<beta>BETA BODY" +
"<foo>GAMMA" +
"</testbean>" +
"</root>";
Reader reader = new StringReader(testXml);
// going to be setting properties on a SimpleTestBean
digester.addObjectCreate("root",
"org.apache.commons.digester.SimpleTestBean");
Rule rule = new SetNestedPropertiesRule();
digester.addRule("root", rule);
try {
SimpleTestBean bean = (SimpleTestBean) digester.parse(reader);
fail("Expected to generate an exception.");
assertNotNull(bean); // just to prevent compiler warning on unused var
} catch(SAXException e) {
Exception nested = e.getException();
if ((nested==null) || !(nested instanceof NoSuchMethodException)) {
// nope, not the sort of exception we expected
throw e;
}
}
}
/**
* Test that unknown child elements are allowed if the appropriate
* flag is set.
*/
@Test
public void testUnknownChildrenExceptionOverride()
throws SAXException, IOException {
String testXml =
"<?xml version='1.0'?>" +
"<root>" +
"<testbean>" +
"<beta>BETA BODY" +
"<foo>GAMMA" +
"</testbean>" +
"</root>";
Reader reader = new StringReader(testXml);
// going to be setting properties on a SimpleTestBean
digester.addObjectCreate("root",
"org.apache.commons.digester.SimpleTestBean");
SetNestedPropertiesRule rule = new SetNestedPropertiesRule();
rule.setAllowUnknownChildElements(true);
digester.addRule("root", rule);
SimpleTestBean bean = (SimpleTestBean) digester.parse(reader);
assertNotNull(bean);
}
/**
* Test that the rule works in a sane manner when the associated pattern
* is a wildcard such that the rule matches one of its own child elements.
* <p>
* See bugzilla entry 31393.
*/
@Test
public void testRecursiveNestedProperties()
throws SAXException, IOException {
String testXml =
"<?xml version='1.0'?>" +
"<testbean>" +
"<beta>BETA BODY" +
"<testbean>" +
"<beta>BETA BODY" +
"</testbean>" +
"</testbean>";
Reader reader = new StringReader(testXml);
// going to be setting properties on a SimpleTestBean
digester.addObjectCreate("*/testbean",
"org.apache.commons.digester.SimpleTestBean");
SetNestedPropertiesRule rule = new SetNestedPropertiesRule();
rule.setAllowUnknownChildElements(true);
digester.addRule("*/testbean", rule);
SimpleTestBean bean = (SimpleTestBean) digester.parse(reader);
assertNotNull(bean);
}
/**
* Get input stream from {@link #TEST_XML}.
*/
private Reader xmlTestReader() {
return new StringReader(TEST_XML);
}
}
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