Examples with TemplateModel freemarker.template.TemplateModel used on opensource projects

Example 41 with TemplateModel

use of freemarker.template.TemplateModel in project freemarker by apache.

the class ClassBasedModelFactory method getInternal.

private TemplateModel getInternal(String key) throws TemplateModelException, ClassNotFoundException {
    {
        TemplateModel model = (TemplateModel) cache.get(key);
        if (model != null)
            return model;
    }
    final ClassIntrospector classIntrospector;
    int classIntrospectorClearingCounter;
    final Object sharedLock = wrapper.getSharedIntrospectionLock();
    synchronized (sharedLock) {
        TemplateModel model = (TemplateModel) cache.get(key);
        if (model != null)
            return model;
        while (model == null && classIntrospectionsInProgress.contains(key)) {
            // waiting for its result.
            try {
                sharedLock.wait();
                model = (TemplateModel) cache.get(key);
            } catch (InterruptedException e) {
                throw new RuntimeException("Class inrospection data lookup aborded: " + e);
            }
        }
        if (model != null)
            return model;
        // This will be the thread that introspects this class.
        classIntrospectionsInProgress.add(key);
        // While the classIntrospector should not be changed from another thread, badly written apps can do that,
        // and it's cheap to get the classIntrospector from inside the lock here:
        classIntrospector = wrapper.getClassIntrospector();
        classIntrospectorClearingCounter = classIntrospector.getClearingCounter();
    }
    try {
        final Class clazz = ClassUtil.forName(key);
        // This is called so that we trigger the
        // class-reloading detector. If clazz is a reloaded class,
        // the wrapper will in turn call our clearCache method.
        // TODO: Why do we check it now and only now?
        classIntrospector.get(clazz);
        TemplateModel model = createModel(clazz);
        if (model != null) {
            synchronized (sharedLock) {
                // Save it into the cache, but only if nothing relevant has changed while we were outside the lock:
                if (classIntrospector == wrapper.getClassIntrospector() && classIntrospectorClearingCounter == classIntrospector.getClearingCounter()) {
                    cache.put(key, model);
                }
            }
        }
        return model;
    } finally {
        synchronized (sharedLock) {
            classIntrospectionsInProgress.remove(key);
            sharedLock.notifyAll();
        }
    }
}

Example 42 with TemplateModel

use of freemarker.template.TemplateModel in project freemarker by apache.

the class ResourceBundleModel method exec.

/**
 * Takes first argument as a resource key, looks up a string in resource bundle
 * with this key, then applies a MessageFormat.format on the string with the
 * rest of the arguments. The created MessageFormats are cached for later reuse.
 */
public Object exec(List arguments) throws TemplateModelException {
    // Must have at least one argument - the key
    if (arguments.size() < 1)
        throw new TemplateModelException("No message key was specified");
    // Read it
    Iterator it = arguments.iterator();
    String key = unwrap((TemplateModel) it.next()).toString();
    try {
        if (!it.hasNext()) {
            return wrap(((ResourceBundle) object).getObject(key));
        }
        // Copy remaining arguments into an Object[]
        int args = arguments.size() - 1;
        Object[] params = new Object[args];
        for (int i = 0; i < args; ++i) params[i] = unwrap((TemplateModel) it.next());
        // Invoke format
        return new StringModel(format(key, params), wrapper);
    } catch (MissingResourceException e) {
        throw new TemplateModelException("No such key: " + key);
    } catch (Exception e) {
        throw new TemplateModelException(e.getMessage());
    }
}

Example 43 with TemplateModel

use of freemarker.template.TemplateModel in project freemarker by apache.

the class _ObjectBuilderSettingEvaluator method setJavaBeanProperties.

private void setJavaBeanProperties(Object bean, List namedParamNames, List namedParamValues) throws _ObjectBuilderSettingEvaluationException {
    if (namedParamNames.isEmpty()) {
        return;
    }
    final Class cl = bean.getClass();
    Map /*<String,Method>*/
    beanPropSetters;
    try {
        PropertyDescriptor[] propDescs = Introspector.getBeanInfo(cl).getPropertyDescriptors();
        beanPropSetters = new HashMap(propDescs.length * 4 / 3, 1.0f);
        for (int i = 0; i < propDescs.length; i++) {
            PropertyDescriptor propDesc = propDescs[i];
            final Method writeMethod = propDesc.getWriteMethod();
            if (writeMethod != null) {
                beanPropSetters.put(propDesc.getName(), writeMethod);
            }
        }
    } catch (Exception e) {
        throw new _ObjectBuilderSettingEvaluationException("Failed to inspect " + cl.getName() + " class", e);
    }
    TemplateHashModel beanTM = null;
    for (int i = 0; i < namedParamNames.size(); i++) {
        String name = (String) namedParamNames.get(i);
        if (!beanPropSetters.containsKey(name)) {
            throw new _ObjectBuilderSettingEvaluationException("The " + cl.getName() + " class has no writeable JavaBeans property called " + StringUtil.jQuote(name) + ".");
        }
        Method beanPropSetter = (Method) beanPropSetters.put(name, null);
        if (beanPropSetter == null) {
            throw new _ObjectBuilderSettingEvaluationException("JavaBeans property " + StringUtil.jQuote(name) + " is set twice.");
        }
        try {
            if (beanTM == null) {
                TemplateModel wrappedObj = env.getObjectWrapper().wrap(bean);
                if (!(wrappedObj instanceof TemplateHashModel)) {
                    throw new _ObjectBuilderSettingEvaluationException("The " + cl.getName() + " class is not a wrapped as TemplateHashModel.");
                }
                beanTM = (TemplateHashModel) wrappedObj;
            }
            TemplateModel m = beanTM.get(beanPropSetter.getName());
            if (m == null) {
                throw new _ObjectBuilderSettingEvaluationException("Can't find " + beanPropSetter + " as FreeMarker method.");
            }
            if (!(m instanceof TemplateMethodModelEx)) {
                throw new _ObjectBuilderSettingEvaluationException(StringUtil.jQuote(beanPropSetter.getName()) + " wasn't a TemplateMethodModelEx.");
            }
            List /*TemplateModel*/
            args = new ArrayList();
            args.add(env.getObjectWrapper().wrap(namedParamValues.get(i)));
            ((TemplateMethodModelEx) m).exec(args);
        } catch (Exception e) {
            throw new _ObjectBuilderSettingEvaluationException("Failed to set " + StringUtil.jQuote(name), e);
        }
    }
}

Example 44 with TemplateModel

use of freemarker.template.TemplateModel in project freemarker by apache.

the class DeepUnwrapTest method testHashEx2Unwrapping.

@SuppressWarnings("rawtypes")
@Test
public void testHashEx2Unwrapping() throws Exception {
    Map<Object, Object> map = new LinkedHashMap<Object, Object>();
    map.put("k1", "v1");
    map.put("k2", null);
    map.put(3, "v3");
    map.put(null, "v4");
    DefaultObjectWrapper dow = new DefaultObjectWrapperBuilder(Configuration.VERSION_2_3_27).build();
    TemplateModel model = dow.wrap(map);
    assertSame(map, DeepUnwrap.unwrap(model));
    Object unwrapped = DeepUnwrap.unwrap(new PurelyTemplateHashModelEx2((TemplateHashModelEx2) model));
    assertNotSame(map, unwrapped);
    assertEquals(map, unwrapped);
    // Order is kept:
    assertArrayEquals(new Object[] { "k1", "k2", 3, null }, ((Map) unwrapped).keySet().toArray());
}

Example 45 with TemplateModel

use of freemarker.template.TemplateModel in project freemarker by apache.

the class DOMNodeModel method get.

public TemplateModel get(String key) throws TemplateModelException {
    TemplateModel result = null;
    if (equivalenceTable.containsKey(key)) {
        key = (String) equivalenceTable.get(key);
    }
    if (cache.containsKey(key)) {
        result = (TemplateModel) cache.get(key);
    }
    if (result == null) {
        if ("attributes".equals(key)) {
            NamedNodeMap attributes = node.getAttributes();
            if (attributes != null) {
                SimpleHash hash = new SimpleHash();
                for (int i = 0; i < attributes.getLength(); i++) {
                    Attr att = (Attr) attributes.item(i);
                    hash.put(att.getName(), att.getValue());
                }
                result = hash;
            }
        } else if (key.charAt(0) == '@') {
            if (node instanceof Element) {
                String attValue = ((Element) node).getAttribute(key.substring(1));
                result = new SimpleScalar(attValue);
            } else {
                throw new TemplateModelException("Trying to get an attribute value for a non-element node");
            }
        } else if ("is_element".equals(key)) {
            result = (node instanceof Element) ? TemplateBooleanModel.TRUE : TemplateBooleanModel.FALSE;
        } else if ("is_text".equals(key)) {
            result = (node instanceof Text) ? TemplateBooleanModel.TRUE : TemplateBooleanModel.FALSE;
        } else if ("name".equals(key)) {
            result = new SimpleScalar(node.getNodeName());
        } else if ("children".equals(key)) {
            result = new NodeListTM(node.getChildNodes());
        } else if ("parent".equals(key)) {
            Node parent = node.getParentNode();
            result = (parent == null) ? null : new DOMNodeModel(parent);
        } else if ("ancestorByName".equals(key)) {
            result = new AncestorByName();
        } else if ("nextSibling".equals(key)) {
            Node next = node.getNextSibling();
            result = (next == null) ? null : new DOMNodeModel(next);
        } else if ("previousSibling".equals(key)) {
            Node previous = node.getPreviousSibling();
            result = (previous == null) ? null : new DOMNodeModel(previous);
        } else if ("nextSiblingElement".equals(key)) {
            Node next = nextSiblingElement(node);
            result = (next == null) ? null : new DOMNodeModel(next);
        } else if ("previousSiblingElement".equals(key)) {
            Node previous = previousSiblingElement(node);
            result = (previous == null) ? null : new DOMNodeModel(previous);
        } else if ("nextElement".equals(key)) {
            Node next = nextElement(node);
            result = (next == null) ? null : new DOMNodeModel(next);
        } else if ("previousElement".equals(key)) {
            Node previous = previousElement(node);
            result = (previous == null) ? null : new DOMNodeModel(previous);
        } else if ("text".equals(key)) {
            result = new SimpleScalar(getText(node));
        }
        cache.put(key, result);
    }
    return result;
}