/*
* Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
*
* Licensed 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;
}
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);
}
}
}