| /* |
| * 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 freemarker.ext.beans; |
| |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import freemarker.template.SimpleNumber; |
| import freemarker.template.TemplateMethodModelEx; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateModelException; |
| import freemarker.template.TemplateSequenceModel; |
| |
| /** |
| * Wraps a set of same-name overloaded methods behind {@link freemarker.template.TemplateMethodModel} interface, |
| * like if it was a single method, chooses among them behind the scenes on call-time based on the argument values. |
| */ |
| public class OverloadedMethodsModel |
| implements |
| TemplateMethodModelEx, |
| TemplateSequenceModel { |
| private final Object object; |
| private final OverloadedMethods overloadedMethods; |
| private final BeansWrapper wrapper; |
| |
| OverloadedMethodsModel(Object object, OverloadedMethods overloadedMethods, BeansWrapper wrapper) { |
| this.object = object; |
| this.overloadedMethods = overloadedMethods; |
| this.wrapper = wrapper; |
| } |
| |
| /** |
| * Invokes the method, passing it the arguments from the list. The actual |
| * method to call from several overloaded methods will be chosen based |
| * on the classes of the arguments. |
| * @throws TemplateModelException if the method cannot be chosen |
| * unambiguously. |
| */ |
| public Object exec(List arguments) |
| throws TemplateModelException { |
| MemberAndArguments maa = overloadedMethods.getMemberAndArguments(arguments, wrapper); |
| try { |
| return maa.invokeMethod(wrapper, object); |
| } catch (Exception e) { |
| if (e instanceof TemplateModelException) throw (TemplateModelException) e; |
| |
| throw _MethodUtil.newInvocationTemplateModelException( |
| object, |
| maa.getCallableMemberDescriptor(), |
| e); |
| } |
| } |
| |
| public TemplateModel get(int index) throws TemplateModelException { |
| return (TemplateModel) exec(Collections.singletonList( |
| new SimpleNumber(Integer.valueOf(index)))); |
| } |
| |
| public int size() throws TemplateModelException { |
| throw new TemplateModelException("?size is unsupported for " + getClass().getName()); |
| } |
| } |