| /* |
| * 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.core; |
| |
| import java.io.IOException; |
| |
| import freemarker.template.TemplateException; |
| |
| /** |
| * Container for a group of related #if, #elseif and #else elements. |
| * Each such block is a nested {@link ConditionalBlock}. Note that if an #if has no #else or #elseif, |
| * {@link ConditionalBlock} doesn't need this parent element. |
| */ |
| final class IfBlock extends TemplateElement { |
| |
| IfBlock(ConditionalBlock block) { |
| setChildBufferCapacity(1); |
| addBlock(block); |
| } |
| |
| void addBlock(ConditionalBlock block) { |
| addChild(block); |
| } |
| |
| @Override |
| TemplateElement[] accept(Environment env) throws TemplateException, IOException { |
| int ln = getChildCount(); |
| for (int i = 0; i < ln; i++) { |
| ConditionalBlock cblock = (ConditionalBlock) getChild(i); |
| Expression condition = cblock.condition; |
| env.replaceElementStackTop(cblock); |
| if (condition == null || condition.evalToBoolean(env)) { |
| return cblock.getChildBuffer(); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| TemplateElement postParseCleanup(boolean stripWhitespace) |
| throws ParseException { |
| if (getChildCount() == 1) { |
| ConditionalBlock cblock = (ConditionalBlock) getChild(0); |
| cblock.setLocation(getTemplate(), cblock, this); |
| return cblock.postParseCleanup(stripWhitespace); |
| } else { |
| return super.postParseCleanup(stripWhitespace); |
| } |
| } |
| |
| @Override |
| protected String dump(boolean canonical) { |
| if (canonical) { |
| StringBuilder buf = new StringBuilder(); |
| int ln = getChildCount(); |
| for (int i = 0; i < ln; i++) { |
| ConditionalBlock cblock = (ConditionalBlock) getChild(i); |
| buf.append(cblock.dump(canonical)); |
| } |
| buf.append("</#if>"); |
| return buf.toString(); |
| } else { |
| return getNodeTypeSymbol(); |
| } |
| } |
| |
| @Override |
| String getNodeTypeSymbol() { |
| return "#if-#elseif-#else-container"; |
| } |
| |
| @Override |
| int getParameterCount() { |
| return 0; |
| } |
| |
| @Override |
| Object getParameterValue(int idx) { |
| throw new IndexOutOfBoundsException(); |
| } |
| |
| @Override |
| ParameterRole getParameterRole(int idx) { |
| throw new IndexOutOfBoundsException(); |
| } |
| |
| @Override |
| boolean isNestedBlockRepeater() { |
| return false; |
| } |
| |
| } |