| /* |
| * 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.freemarker.core; |
| |
| import java.io.IOException; |
| |
| /** |
| * AST directive node: When a {@code #list} has an {@code #else}, this is the parent of the two nodes. |
| */ |
| class ASTDirListElseContainer extends ASTDirective { |
| |
| private final ASTDirList listPart; |
| private final ASTDirElseOfList elsePart; |
| |
| public ASTDirListElseContainer(ASTDirList listPart, ASTDirElseOfList elsePart) { |
| setChildBufferCapacity(2); |
| addChild(listPart); |
| addChild(elsePart); |
| this.listPart = listPart; |
| this.elsePart = elsePart; |
| } |
| |
| @Override |
| ASTElement[] execute(Environment env) throws TemplateException, IOException { |
| boolean hadItems; |
| |
| TemplateProcessingTracer templateProcessingTracer = env.getTemplateProcessingTracer(); |
| if (templateProcessingTracer == null) { |
| hadItems = listPart.acceptWithResult(env); |
| } else { |
| templateProcessingTracer.enterElement(env, listPart); |
| try { |
| hadItems = listPart.acceptWithResult(env); |
| } finally { |
| templateProcessingTracer.exitElement(env); |
| } |
| } |
| |
| if (hadItems) { |
| return null; |
| } |
| |
| return new ASTElement[] { elsePart }; |
| } |
| |
| @Override |
| boolean isNestedBlockRepeater() { |
| return false; |
| } |
| |
| @Override |
| String dump(boolean canonical) { |
| if (canonical) { |
| StringBuilder buf = new StringBuilder(); |
| int ln = getChildCount(); |
| for (int i = 0; i < ln; i++) { |
| ASTElement element = fastGetChild(i); |
| buf.append(element.dump(canonical)); |
| } |
| buf.append("</#list>"); |
| return buf.toString(); |
| } else { |
| return getLabelWithoutParameters(); |
| } |
| } |
| |
| @Override |
| public String getLabelWithoutParameters() { |
| return "#list-#else-container"; |
| } |
| |
| @Override |
| int getParameterCount() { |
| return 0; |
| } |
| |
| @Override |
| Object getParameterValue(int idx) { |
| throw new IndexOutOfBoundsException(); |
| } |
| |
| @Override |
| ParameterRole getParameterRole(int idx) { |
| throw new IndexOutOfBoundsException(); |
| } |
| |
| } |