| /* |
| * Copyright (c) 2003 The Visigoth Software Society. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowledgement: |
| * "This product includes software developed by the |
| * Visigoth Software Society (http://www.visigoths.org/)." |
| * Alternately, this acknowledgement may appear in the software itself, |
| * if and wherever such third-party acknowledgements normally appear. |
| * |
| * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the |
| * project contributors may be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact visigoths@visigoths.org. |
| * |
| * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth" |
| * nor may "FreeMarker" or "Visigoth" appear in their names |
| * without prior written permission of the Visigoth Software Society. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Visigoth Software Society. For more |
| * information on the Visigoth Software Society, please see |
| * http://www.visigoths.org/ |
| */ |
| |
| package freemarker.ext.beans; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import freemarker.log.Logger; |
| import freemarker.template.TemplateCollectionModel; |
| import freemarker.template.TemplateHashModelEx; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateModelException; |
| |
| /** |
| * Wraps the static fields and methods of a class in a |
| * {@link freemarker.template.TemplateHashModel}. |
| * Fields are wrapped using {@link BeansWrapper#wrap(Object)}, and |
| * methods are wrapped into an appropriate {@link freemarker.template.TemplateMethodModelEx} instance. |
| * Unfortunately, there is currently no support for bean property-style |
| * calls of static methods, similar to that in {@link BeanModel}. |
| * @author Attila Szegedi |
| */ |
| final class StaticModel implements TemplateHashModelEx |
| { |
| private static final Logger logger = Logger.getLogger("freemarker.beans"); |
| private final Class clazz; |
| private final BeansWrapper wrapper; |
| private final Map map = new HashMap(); |
| |
| StaticModel(Class clazz, BeansWrapper wrapper) throws TemplateModelException |
| { |
| this.clazz = clazz; |
| this.wrapper = wrapper; |
| populate(); |
| } |
| |
| /** |
| * Returns the field or method named by the <tt>key</tt> |
| * parameter. |
| */ |
| public TemplateModel get(String key) throws TemplateModelException |
| { |
| Object model = map.get(key); |
| // Simple method, overloaded method or final field -- these have cached |
| // template models |
| if (model instanceof TemplateModel) |
| return (TemplateModel) model; |
| // Non-final field; this must be evaluated on each call. |
| if (model instanceof Field) |
| { |
| try |
| { |
| return wrapper.getOuterIdentity().wrap(((Field) model).get(null)); |
| } |
| catch (IllegalAccessException e) |
| { |
| throw new TemplateModelException( |
| "Illegal access for field " + key + " of class " + clazz.getName()); |
| } |
| } |
| |
| throw new TemplateModelException( |
| "No such key: " + key + " in class " + clazz.getName()); |
| } |
| |
| /** |
| * Returns true if there is at least one public static |
| * field or method in the underlying class. |
| */ |
| public boolean isEmpty() |
| { |
| return map.isEmpty(); |
| } |
| |
| public int size() |
| { |
| return map.size(); |
| } |
| |
| public TemplateCollectionModel keys() throws TemplateModelException |
| { |
| return (TemplateCollectionModel)wrapper.getOuterIdentity().wrap(map.keySet()); |
| } |
| |
| public TemplateCollectionModel values() throws TemplateModelException |
| { |
| return (TemplateCollectionModel)wrapper.getOuterIdentity().wrap(map.values()); |
| } |
| |
| private void populate() throws TemplateModelException |
| { |
| if (!Modifier.isPublic(clazz.getModifiers())) |
| { |
| throw new TemplateModelException( |
| "Can't wrap the non-public class " + clazz.getName()); |
| } |
| |
| if(wrapper.getExposureLevel() == BeansWrapper.EXPOSE_NOTHING) |
| { |
| return; |
| } |
| |
| Field[] fields = clazz.getFields(); |
| for (int i = 0; i < fields.length; ++i) |
| { |
| Field field = fields[i]; |
| int mod = field.getModifiers(); |
| if (Modifier.isPublic(mod) && Modifier.isStatic(mod)) |
| { |
| if (Modifier.isFinal(mod)) |
| try |
| { |
| // public static final fields are evaluated once and |
| // stored in the map |
| map.put(field.getName(), wrapper.getOuterIdentity().wrap(field.get(null))); |
| } |
| catch (IllegalAccessException e) |
| { |
| // Intentionally ignored |
| } |
| else |
| // This is a special flagging value: Field in the map means |
| // that this is a non-final field, and it must be evaluated |
| // on each get() call. |
| map.put(field.getName(), field); |
| } |
| } |
| if(wrapper.getExposureLevel() < BeansWrapper.EXPOSE_PROPERTIES_ONLY) |
| { |
| Method[] methods = clazz.getMethods(); |
| for (int i = 0; i < methods.length; ++i) |
| { |
| Method method = methods[i]; |
| int mod = method.getModifiers(); |
| if (Modifier.isPublic(mod) && Modifier.isStatic(mod) && wrapper.isSafeMethod(method)) |
| { |
| String name = method.getName(); |
| Object obj = map.get(name); |
| if (obj instanceof Method) |
| { |
| OverloadedMethods overloadedMethods = new OverloadedMethods(wrapper); |
| overloadedMethods.addMethod((Method) obj); |
| overloadedMethods.addMethod(method); |
| map.put(name, overloadedMethods); |
| } |
| else if(obj instanceof OverloadedMethods) |
| { |
| OverloadedMethods overloadedMethods = (OverloadedMethods) obj; |
| overloadedMethods.addMethod(method); |
| } |
| else |
| { |
| if(obj != null) |
| { |
| if (logger.isInfoEnabled()) { |
| logger.info("Overwriting value [" + obj + "] for " + |
| " key '" + name + "' with [" + method + |
| "] in static model for " + clazz.getName()); |
| } |
| } |
| map.put(name, method); |
| } |
| } |
| } |
| for (Iterator entries = map.entrySet().iterator(); entries.hasNext();) |
| { |
| Map.Entry entry = (Map.Entry) entries.next(); |
| Object value = entry.getValue(); |
| if (value instanceof Method) |
| { |
| Method method = (Method)value; |
| entry.setValue(new SimpleMethodModel(null, method, |
| method.getParameterTypes(), wrapper)); |
| } |
| else if (value instanceof OverloadedMethods) |
| { |
| entry.setValue(new OverloadedMethodsModel(null, |
| (OverloadedMethods)value)); |
| } |
| } |
| } |
| } |
| } |