freemarker.core.RangeModel Maven / Gradle / Ivy
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Google App Engine compliant variation of FreeMarker.
FreeMarker is a "template engine"; a generic tool to generate text output based on templates.
/*
* 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 freemarker.template.SimpleNumber;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;
import freemarker.template.TemplateSequenceModel;
abstract class RangeModel implements TemplateSequenceModel, java.io.Serializable {
private final int begin;
public RangeModel(int begin) {
this.begin = begin;
}
final int getBegining() {
return begin;
}
final public TemplateModel get(int index) throws TemplateModelException {
if (index < 0 || index >= size()) {
throw new _TemplateModelException(new Object[] {
"Range item index ", new Integer(index), " is out of bounds." });
}
long value = begin + getStep() * (long) index;
return value <= Integer.MAX_VALUE ? new SimpleNumber((int) value) : new SimpleNumber(value);
}
/**
* @return {@code 1} or {@code -1}; other return values need not be properly handled until FTL supports other steps.
*/
abstract int getStep();
abstract boolean isRightUnbounded();
abstract boolean isRightAdaptive();
abstract boolean isAffactedByStringSlicingBug();
}