Example usage for org.apache.commons.jxpath JXPathContext getValue

Introduction

In this page you can find the example usage for org.apache.commons.jxpath JXPathContext getValue.

Prototype

public abstract Object getValue(String xpath, Class requiredType);

Source Link

Document

Evaluates the xpath, converts the result to the specified class and returns the resulting object.

Usage

From source file:org.chiba.xml.xforms.action.SetIndexAction.java

/**
 * Performs the <code>setindex</code> action.
 *
 * @return always <code>true</code>.
 * @throws XFormsException if an error occurred during <code>setindex</code>
 * processing./*from w  w  w .ja v  a 2s. c  o  m*/
 */
public boolean perform() throws XFormsException {
    // lookup repeat element
    Repeat repeat = (Repeat) this.container.lookup(this.repeatAttribute);

    // todo: check wether this interpretation is correct/useful and write a test for it
    String locationPath;
    if (isRepeated()) {
        // use the enclosing repeat as context
        RepeatItem repeatItem = (RepeatItem) getContainerObject().lookup(getRepeatItemId());
        locationPath = repeatItem.getLocationPath() + "[" + this.indexAttribute + "]";
    } else {
        // use the target repeat as context
        locationPath = repeat.getLocationPath() + "[" + this.indexAttribute + "]";
    }

    // get instance
    Instance instance = repeat.getModel().getInstance(repeat.getInstanceId());
    JXPathContext context = instance.getInstanceContext();

    int index;
    if (instance.existsNode(locationPath)) {
        // compute index from position
        String instancePath = context.getPointer(locationPath).asPath();
        index = PathUtil.stepIndex(PathUtil.lastStep(instancePath));
    } else {
        // compute index w/o context
        index = ((Integer) context.getValue(this.indexAttribute, java.lang.Integer.class)).intValue();
    }

    // check boundaries
    if (index < 1) {
        repeat.setIndex(1);
        this.container.dispatch(repeat.getTarget(), EventFactory.SCROLL_FIRST, null);
    } else if (index > repeat.getContextSize()) {
        index = repeat.getContextSize();
        repeat.setIndex(index);
        this.container.dispatch(repeat.getTarget(), EventFactory.SCROLL_LAST, null);
    } else {
        // set repeat index
        repeat.setIndex(index);
    }

    // update behaviour (defined by chiba ;-)
    setDeferredRefresh(repeat.getModel().getId(), true);

    // always indicate success
    return true;
}

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From source file:org.chiba.xml.xforms.ui.test.RepeatTest.java

/**
 * Tests for correct prototype handling.
 *
 * @throws Exception if any error occurred during the test.
 *//*  ww w .j  a  va 2s.c  o m*/
public void testRepeatPrototype() throws Exception {
    JXPathContext context = JXPathContext.newContext(this.repeat.getElement());

    /*
    <chiba:data ... >
    <xforms:group chiba:transient="true" chiba:position="0">
        <xforms:input id="input" xforms:ref=".">
            <xforms:alert id="..."/>
        </xforms:input>
        <xforms:output id="output" xforms:ref="."/>
    </xforms:group>
    </chiba:data>
    */
    assertEquals("1", context.getValue("count(chiba:data/*)", Integer.class).toString());

    assertEquals("group", context.getValue("local-name(chiba:data/*[1])").toString());
    assertEquals(NamespaceCtx.XFORMS_NS, context.getValue("namespace-uri(chiba:data/*[1])").toString());
    assertEquals("true", context.getValue("chiba:data/xforms:group/@chiba:transient").toString());
    assertEquals("0", context.getValue("chiba:data/xforms:group/@chiba:position").toString());
    assertEquals("2", context.getValue("count(chiba:data/xforms:group/*)", Integer.class).toString());

    assertEquals("input", context.getValue("local-name(chiba:data/xforms:group/*[1])").toString());
    assertEquals(NamespaceCtx.XFORMS_NS,
            context.getValue("namespace-uri(chiba:data/xforms:group/*[1])").toString());
    assertEquals("input", context.getValue("chiba:data/xforms:group/xforms:input/@id").toString());
    assertEquals(".", context.getValue("chiba:data/xforms:group/xforms:input/@xforms:ref").toString());
    assertEquals("1",
            context.getValue("count(chiba:data/xforms:group/xforms:input/*)", Integer.class).toString());

    assertEquals("alert", context.getValue("local-name(chiba:data/xforms:group/xforms:input/*[1])").toString());
    assertEquals(NamespaceCtx.XFORMS_NS,
            context.getValue("namespace-uri(chiba:data/xforms:group/xforms:input/*[1])").toString());
    assertEquals(true, context.getValue("chiba:data/xforms:group/xforms:output/@id").toString().length() > 0);
    assertEquals("0",
            context.getValue("count(chiba:data/xforms:group/xforms:output/*)", Integer.class).toString());

    assertEquals("output", context.getValue("local-name(chiba:data/xforms:group/*[2])").toString());
    assertEquals(NamespaceCtx.XFORMS_NS,
            context.getValue("namespace-uri(chiba:data/xforms:group/*[2])").toString());
    assertEquals("output", context.getValue("chiba:data/xforms:group/xforms:output/@id").toString());
    assertEquals(".", context.getValue("chiba:data/xforms:group/xforms:output/@xforms:ref").toString());
    assertEquals("0",
            context.getValue("count(chiba:data/xforms:group/xforms:output/*)", Integer.class).toString());
}

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From source file:org.chiba.xml.xforms.xpath.XFormsExtensionFunctions.java

/**
 * The avg() Function [7.7.1]./*from www.j  a va 2 s.com*/
 * <p/>
 * Function avg returns the arithmetic average of the result of
 * converting the string-values of each node in the argument node-set
 * to a number. The sum is computed with sum(), and divided with div
 * by the value computed with count().
 *
 * @param context the expression context.
 * @param nodeset the node-set.
 * @return the computed node-set average.
 */
public static double avg(ExpressionContext context, List nodeset) {
    if ((nodeset == null) || (nodeset.size() == 0)) {
        return Double.NaN;
    }

    JXPathContext rootContext = context.getJXPathContext();
    rootContext.getVariables().declareVariable("nodeset", nodeset);

    Double value = (Double) rootContext.getValue("sum($nodeset) div count($nodeset)", Double.class);

    return value.doubleValue();
}

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From source file:org.chiba.xml.xforms.xpath.XFormsExtensionFunctions.java

/**
 * The max() Function [7.7.3]./*from   w w w . j a  v a 2  s.c  o m*/
 * <p/>
 * Function max returns the maximum value of the result of converting
 * the string-values of each node in argument node-set to a number.
 * "Maximum" is determined with the &gt; operator. If the parameter is
 * an empty node-set, the return value is NaN.
 *
 * @param context the expression context.
 * @param nodeset the node-set.
 * @return the computed node-set maximum.
 */
public static double max(ExpressionContext context, List nodeset) {
    if ((nodeset == null) || (nodeset.size() == 0)) {
        return Double.NaN;
    }

    JXPathContext rootContext = context.getJXPathContext();
    Object max = nodeset.get(0);

    for (int index = 1; index < nodeset.size(); index++) {
        Object current = nodeset.get(index);
        rootContext.getVariables().declareVariable("max", max);
        rootContext.getVariables().declareVariable("current", current);

        boolean more = ((Boolean) rootContext.getValue("number($current) > number($max)", Boolean.class))
                .booleanValue();

        if (more) {
            max = current;
        }
    }

    return (new Double(max.toString())).doubleValue();
}

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From source file:org.chiba.xml.xforms.xpath.XFormsExtensionFunctions.java

/**
 * The min() Function [7.7.2]./*ww w  . j  av  a  2  s .c  o m*/
 * <p/>
 * Function min returns the minimum value of the result of converting
 * the string-values of each node in argument node-set to a number.
 * "Minimum" is determined with the &lt; operator. If the parameter is
 * an empty node-set, the return value is NaN.
 *
 * @param context the expression context.
 * @param nodeset the node-set.
 * @return the computed node-set minimum.
 */
public static double min(ExpressionContext context, List nodeset) {
    if ((nodeset == null) || (nodeset.size() == 0)) {
        return Double.NaN;
    }

    JXPathContext rootContext = context.getJXPathContext();
    Object min = nodeset.get(0);

    for (int index = 1; index < nodeset.size(); index++) {
        Object current = nodeset.get(index);
        rootContext.getVariables().declareVariable("min", min);
        rootContext.getVariables().declareVariable("current", current);

        boolean less = ((Boolean) rootContext.getValue("number($current) < number($min)", Boolean.class))
                .booleanValue();

        if (less) {
            min = current;
        }
    }

    return (new Double(min.toString())).doubleValue();
}

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From source file:org.firesoa.common.jxpath.JXPathTestCase.java

protected void assertXPathValue(JXPathContext ctx, String xpath, Object expected, Class resultType) {
    ctx.setLenient(false);//w ww .j  a  v a  2  s.c  om
    Object actual = ctx.getValue(xpath, resultType);
    assertEquals("Evaluating <" + xpath + ">", expected, actual);
}

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From source file:org.lilyproject.runtime.conf.test.InheritanceTest.java

public void testInheritance1() throws Exception {
    ConfImpl parent = loadConf("inherit1_parent.xml");

    // Child 1/*  w  ww.j ava 2 s.c  o  m*/
    {
        ConfImpl child = loadConf("inherit1_child1.xml");
        child.inherit(parent);

        JXPathContext context = JXPathContext.newContext(child);
        assertEquals(1, context.getValue("count(properties)", Integer.class));
        assertEquals(3, context.getValue("count(properties/property)", Integer.class));

        assertEquals("value1", context.getValue("properties/property[@key='key1']"));
        assertEquals("value2 - altered", context.getValue("properties/property[@key='key2']"));
        assertEquals("value3", context.getValue("properties/property[@key='key3']"));
    }

    // Child 2
    {
        ConfImpl child = loadConf("inherit1_child2.xml");
        child.inherit(parent);

        JXPathContext context = JXPathContext.newContext(child);
        assertEquals(1, context.getValue("count(properties)", Integer.class));
        assertEquals(4, context.getValue("count(properties/property)", Integer.class));

        assertEquals("value1", context.getValue("properties/property[@key='key1']"));
        assertEquals("value2 - altered", context.getValue("properties/property[@key='key2'][1]"));
        assertEquals("value2", context.getValue("properties/property[@key='key2'][2]"));
        assertEquals("value3", context.getValue("properties/property[@key='key3']"));
    }

    // Child 3
    {
        ConfImpl child = loadConf("inherit1_child3.xml");
        child.inherit(parent);

        JXPathContext context = JXPathContext.newContext(child);
        assertEquals(1, context.getValue("count(properties)", Integer.class));
        assertEquals(1, context.getValue("count(properties/property)", Integer.class));

        assertEquals("value3", context.getValue("properties/property[@key='key3']"));
    }

    // Child 4
    {
        ConfImpl child = loadConf("inherit1_child4.xml");
        child.inherit(parent);

        JXPathContext context = JXPathContext.newContext(child);
        assertEquals(0, context.getValue("count(*)", Integer.class));
    }
}

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From source file:org.lilyproject.runtime.conf.test.InheritanceTest.java

public void testInheritance2() throws Exception {
    ConfImpl parent = loadConf("inherit2_parent.xml");

    // Child 1//from  w w w. jav  a  2  s.co  m
    {
        ConfImpl child = loadConf("inherit2_child1.xml");
        child.inherit(parent);

        JXPathContext context = JXPathContext.newContext(child);
        assertEquals(3, context.getValue("count(*)", Integer.class));

        assertEquals("val1", context.getValue("@attr1"));
        assertEquals("val2 - altered", context.getValue("@attr2"));

        assertEquals("ee", context.getValue("c/e"));

        context.setLenient(true);
        assertEquals(null, context.getValue("c/d"));
    }
}

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From source file:org.openvpms.component.business.service.archetype.assertion.ExpressionAssertions.java

/**
 * Determines if a node value is valid according to an associated
 * expression./*  w  w w  .  j  a va 2 s . c  o m*/
 *
 * @param context the assertion context
 * @return <tt>true</tt> if the expression is valid,
 *         otherwise <tt>false</tt>
 */
public static boolean validate(ActionContext context) {
    NamedProperty property = context.getProperty("expression");
    String expression = (String) property.getValue();
    ArchetypeDescriptor archetype = getArchetypeDescriptor(context.getNode());
    if (archetype != null) {
        expression = getExpression(archetype, expression);
    }
    JXPathContext pathContext = JXPathHelper.newContext(context.getParent());
    Object result = pathContext.getValue(expression, Boolean.class);
    return (result != null) && (Boolean) result;
}

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From source file:org.openvpms.web.echo.style.StylePropertyEvaluator.java

/**
 * Evaluates an expression.//w w  w. j a va2s  .c  om
 *
 * @param context    the jxpath context
 * @param expression the xpath expression
 * @return the value of the expression
 */
private String evaluate(String expression, JXPathContext context) {
    String result = null;
    try {
        Object value = context.getValue(expression, Object.class);
        if (value instanceof Number) {
            result = String.valueOf(round((Number) value));
        } else if (value != null) {
            result = value.toString();
        }
    } catch (Throwable exception) {
        throw new StyleSheetException(StyleSheetException.ErrorCode.InvalidExpression, exception, expression);
    }
    return result;
}

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