Commons JXPath example source code file (CoreFunctionTest.java)

This example Commons JXPath source code file (CoreFunctionTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons JXPath tags/keywords

boolean, decimalformatsymbols, double, double, jxpathcontext, list, nodepointer, nodepointer, nodeset, object, object, pointer, string, string, text, util

The Commons JXPath CoreFunctionTest.java source code

/*
 * 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.jxpath.ri.compiler;

import java.text.DecimalFormatSymbols;
import java.util.Arrays;
import java.util.List;

import org.apache.commons.jxpath.ExtendedKeyManager;
import org.apache.commons.jxpath.IdentityManager;
import org.apache.commons.jxpath.JXPathContext;
import org.apache.commons.jxpath.JXPathTestCase;
import org.apache.commons.jxpath.KeyManager;
import org.apache.commons.jxpath.NodeSet;
import org.apache.commons.jxpath.Pointer;
import org.apache.commons.jxpath.TestMixedModelBean;
import org.apache.commons.jxpath.Variables;
import org.apache.commons.jxpath.ri.model.NodePointer;

/**
 * Test basic functionality of JXPath - core functions.
 *
 * @author Dmitri Plotnikov
 * @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
 */
public class CoreFunctionTest extends JXPathTestCase {
    private JXPathContext context;

    public void setUp() {
        if (context == null) {
            context = JXPathContext.newContext(new TestMixedModelBean());
            Variables vars = context.getVariables();
            vars.declareVariable("nan", new Double(Double.NaN));
            vars.declareVariable("bool_true", new Boolean("true"));
            vars.declareVariable("bool_false", new Boolean("false"));
        }
    }

    public void testCoreFunctions() {
        assertXPathValue(context, "string(2)", "2");
        assertXPathValue(context, "string($nan)", "NaN");
        assertXPathValue(context, "string(-$nan)", "NaN");
        assertXPathValue(context, "string(-2 div 0)", "-Infinity");
        assertXPathValue(context, "string(2 div 0)", "Infinity");
        assertXPathValue(context, "concat('a', 'b', 'c')", "abc");
        assertXPathValue(context, "starts-with('abc', 'ab')", Boolean.TRUE);
        assertXPathValue(context, "starts-with('xabc', 'ab')", Boolean.FALSE);
        assertXPathValue(context, "contains('xabc', 'ab')", Boolean.TRUE);
        assertXPathValue(context, "contains('xabc', 'ba')", Boolean.FALSE);
        assertXPathValue(
            context,
            "substring-before('1999/04/01', '/')",
            "1999");
        assertXPathValue(
            context,
            "substring-after('1999/04/01', '/')",
            "04/01");
        assertXPathValue(context, "substring('12345', 2, 3)", "234");
        assertXPathValue(context, "substring('12345', 2)", "2345");
        assertXPathValue(context, "substring('12345', 1.5, 2.6)", "234");
        assertXPathValue(context, "substring('12345', 0, 3)", "12");
        assertXPathValue(context, "substring('12345', 0 div 0, 3)", "");
        assertXPathValue(context, "substring('12345', 1, 0 div 0)", "");
        assertXPathValue(context, "substring('12345', -42, 1 div 0)", "12345");
        assertXPathValue(context, "substring('12345', -1 div 0, 1 div 0)", "");
        assertXPathValue(context, "substring('12345', 6, 6)", "");
        assertXPathValue(context, "substring('12345', 7, 8)", "");
        assertXPathValue(context, "substring('12345', 7)", "");
        assertXPathValue(context, "string-length('12345')", new Double(5));
        assertXPathValue(context, "normalize-space(' abc  def  ')", "abc def");
        assertXPathValue(context, "normalize-space('abc def')", "abc def");
        assertXPathValue(context, "normalize-space('   ')", "");
        assertXPathValue(context, "translate('--aaa--', 'abc-', 'ABC')", "AAA");
        assertXPathValue(context, "boolean(1)", Boolean.TRUE);
        assertXPathValue(context, "boolean(0)", Boolean.FALSE);
        assertXPathValue(context, "boolean('x')", Boolean.TRUE);
        assertXPathValue(context, "boolean('')", Boolean.FALSE);
        assertXPathValue(context, "boolean(/list)", Boolean.TRUE);
        assertXPathValue(context, "boolean(/list[position() < 1])", Boolean.FALSE);

        assertXPathValue(context, "true()", Boolean.TRUE);
        assertXPathValue(context, "false()", Boolean.FALSE);
        assertXPathValue(context, "not(false())", Boolean.TRUE);
        assertXPathValue(context, "not(true())", Boolean.FALSE);
        assertXPathValue(context, "null()", null);        
        assertXPathValue(context, "number('1')", new Double(1));
        assertXPathValue(context, "number($bool_true)", new Double(1));
        assertXPathValue(context, "number($bool_false)", new Double(0));
        assertXPathValue(context, "floor(1.5)", new Double(1));
        assertXPathValue(context, "floor(-1.5)", new Double(-2));
        assertXPathValue(context, "ceiling(1.5)", new Double(2));
        assertXPathValue(context, "ceiling(-1.5)", new Double(-1));
        assertXPathValue(context, "round(1.5)", new Double(2));
        assertXPathValue(context, "round(-1.5)", new Double(-1));

        assertXPathValue(context, "floor('NaN')", new Double(Double.NaN));
        assertXPathValue(context, "floor(-2 div 0)", new Double(Double.NEGATIVE_INFINITY));
        assertXPathValue(context, "floor(2 div 0)", new Double(Double.POSITIVE_INFINITY));
        assertXPathValue(context, "ceiling('NaN')", new Double(Double.NaN));
        assertXPathValue(context, "ceiling(-2 div 0)", new Double(Double.NEGATIVE_INFINITY));
        assertXPathValue(context, "ceiling(2 div 0)", new Double(Double.POSITIVE_INFINITY));
        assertXPathValue(context, "round('NaN')", new Double(Double.NaN));
        assertXPathValue(context, "round(-2 div 0)", new Double(Double.NEGATIVE_INFINITY));
        assertXPathValue(context, "round(2 div 0)", new Double(Double.POSITIVE_INFINITY));
    }

    public void testIDFunction() {
        context.setIdentityManager(new IdentityManager() {
            public Pointer getPointerByID(JXPathContext context, String id) {
                NodePointer ptr = (NodePointer) context.getPointer("/document");
                ptr = ptr.getValuePointer();
                return ptr.getPointerByID(context, id);
            }
        });

        assertXPathValueAndPointer(
            context,
            "id(101)//street",
            "Tangerine Drive",
            "id('101')/address[1]/street[1]");

        assertXPathPointerLenient(
            context,
            "id(105)/address/street",
            "id(105)/address/street");
    }

    public void testKeyFunction() {
        context.setKeyManager(new KeyManager() {
            public Pointer getPointerByKey(
                JXPathContext context,
                String key,
                String value) 
            {
                return NodePointer.newNodePointer(null, "42", null);
            }
        });

        assertXPathValue(context, "key('a', 'b')", "42");
    }

    public void testExtendedKeyFunction() {
        context.setKeyManager(new ExtendedKeyManager() {
            public Pointer getPointerByKey(JXPathContext context, String key,
                    String value) {
                return NodePointer.newNodePointer(null, "incorrect", null);
            }

            public NodeSet getNodeSetByKey(JXPathContext context,
                    String keyName, Object keyValue) {
                return new NodeSet() {

                    public List getNodes() {
                        return Arrays.asList(new Object[] { "53", "64" });
                    }

                    public List getPointers() {
                        return Arrays.asList(new NodePointer[] {
                                NodePointer.newNodePointer(null, "53", null),
                                NodePointer.newNodePointer(null, "64", null) });
                    }

                    public List getValues() {
                        return Arrays.asList(new Object[] { "53", "64" });
                    }

                };
            }
        });
        assertXPathValue(context, "key('a', 'b')", "53");
        assertXPathValue(context, "key('a', 'b')[1]", "53");
        assertXPathValue(context, "key('a', 'b')[2]", "64");
        assertXPathValueIterator(context, "key('a', 'b')", list("53", "64"));
        assertXPathValueIterator(context, "'x' | 'y'", list("x", "y"));
        assertXPathValueIterator(context, "key('a', 'x' | 'y')", list("53", "64", "53", "64"));
        assertXPathValueIterator(context, "key('a', /list[position() < 4])", list("53", "64", "53", "64", "53", "64"));
        context.getVariables().declareVariable("ints", new int[] { 0, 0 });
        assertXPathValueIterator(context, "key('a', $ints)", list("53", "64", "53", "64"));
    }

    public void testFormatNumberFunction() {
        
        DecimalFormatSymbols symbols = new DecimalFormatSymbols();
        symbols.setDigit('D');
        
        context.setDecimalFormatSymbols("test", symbols);
        
        assertXPathValue(
            context,
            "format-number(123456789, '#.000000000')",
            "123456789.000000000");

        assertXPathValue(
            context,
            "format-number(123456789, '#.0')",
            "123456789.0");

        assertXPathValue(
            context, 
            "format-number(0.123456789, '##%')", 
            "12%");

        assertXPathValue(
            context,
            "format-number(123456789, '################')",
            "123456789");

        assertXPathValue(
            context,
            "format-number(123456789, 'D.0', 'test')",
            "123456789.0");

        assertXPathValue(
            context,
            "format-number(123456789, '$DDD,DDD,DDD.DD', 'test')",
            "$123,456,789");
    }
}