| /* |
| * 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.util.List; |
| |
| import freemarker.core.IteratorBlock.IterationContext; |
| import freemarker.template.SimpleNumber; |
| import freemarker.template.SimpleScalar; |
| import freemarker.template.TemplateBooleanModel; |
| import freemarker.template.TemplateException; |
| import freemarker.template.TemplateMethodModelEx; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateModelException; |
| |
| |
| class BuiltInsForLoopVariables { |
| |
| static class indexBI extends BuiltInForLoopVariable { |
| |
| @Override |
| TemplateModel calculateResult(IterationContext iterCtx, Environment env) throws TemplateException { |
| return new SimpleNumber(iterCtx.getIndex()); |
| } |
| |
| } |
| |
| static class counterBI extends BuiltInForLoopVariable { |
| |
| @Override |
| TemplateModel calculateResult(IterationContext iterCtx, Environment env) throws TemplateException { |
| return new SimpleNumber(iterCtx.getIndex() + 1); |
| } |
| |
| } |
| |
| static abstract class BooleanBuiltInForLoopVariable extends BuiltInForLoopVariable { |
| |
| @Override |
| final TemplateModel calculateResult(IterationContext iterCtx, Environment env) throws TemplateException { |
| return calculateBooleanResult(iterCtx, env) ? TemplateBooleanModel.TRUE : TemplateBooleanModel.FALSE; |
| } |
| |
| protected abstract boolean calculateBooleanResult(IterationContext iterCtx, Environment env); |
| |
| } |
| |
| static class has_nextBI extends BooleanBuiltInForLoopVariable { |
| |
| @Override |
| protected boolean calculateBooleanResult(IterationContext iterCtx, Environment env) { |
| return iterCtx.hasNext(); |
| } |
| |
| } |
| |
| static class is_lastBI extends BooleanBuiltInForLoopVariable { |
| |
| @Override |
| protected boolean calculateBooleanResult(IterationContext iterCtx, Environment env) { |
| return !iterCtx.hasNext(); |
| } |
| |
| } |
| |
| static class is_firstBI extends BooleanBuiltInForLoopVariable { |
| |
| @Override |
| protected boolean calculateBooleanResult(IterationContext iterCtx, Environment env) { |
| return iterCtx.getIndex() == 0; |
| } |
| |
| } |
| |
| static class is_odd_itemBI extends BooleanBuiltInForLoopVariable { |
| |
| @Override |
| protected boolean calculateBooleanResult(IterationContext iterCtx, Environment env) { |
| return iterCtx.getIndex() % 2 == 0; |
| } |
| |
| } |
| |
| static class is_even_itemBI extends BooleanBuiltInForLoopVariable { |
| |
| @Override |
| protected boolean calculateBooleanResult(IterationContext iterCtx, Environment env) { |
| return iterCtx.getIndex() % 2 != 0; |
| } |
| |
| } |
| |
| static class item_parityBI extends BuiltInForLoopVariable { |
| |
| private static final SimpleScalar ODD = new SimpleScalar("odd"); |
| private static final SimpleScalar EVEN = new SimpleScalar("even"); |
| |
| @Override |
| TemplateModel calculateResult(IterationContext iterCtx, Environment env) throws TemplateException { |
| return iterCtx.getIndex() % 2 == 0 ? ODD: EVEN; |
| } |
| |
| } |
| |
| static class item_parity_capBI extends BuiltInForLoopVariable { |
| |
| private static final SimpleScalar ODD = new SimpleScalar("Odd"); |
| private static final SimpleScalar EVEN = new SimpleScalar("Even"); |
| |
| @Override |
| TemplateModel calculateResult(IterationContext iterCtx, Environment env) throws TemplateException { |
| return iterCtx.getIndex() % 2 == 0 ? ODD: EVEN; |
| } |
| |
| } |
| |
| static class item_cycleBI extends BuiltInForLoopVariable { |
| |
| private class BIMethod implements TemplateMethodModelEx { |
| |
| private final IterationContext iterCtx; |
| |
| private BIMethod(IterationContext iterCtx) { |
| this.iterCtx = iterCtx; |
| } |
| |
| @Override |
| public Object exec(List args) throws TemplateModelException { |
| checkMethodArgCount(args, 1, Integer.MAX_VALUE); |
| return args.get(iterCtx.getIndex() % args.size()); |
| } |
| } |
| |
| @Override |
| TemplateModel calculateResult(IterationContext iterCtx, Environment env) throws TemplateException { |
| return new BIMethod(iterCtx); |
| } |
| |
| } |
| |
| } |