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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.

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/*
 * 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.ext.beans;

import java.util.AbstractList;

import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelAdapter;
import freemarker.template.TemplateModelException;
import freemarker.template.TemplateSequenceModel;
import freemarker.template.utility.UndeclaredThrowableException;

/**
 */
class SequenceAdapter extends AbstractList implements TemplateModelAdapter {
    private final BeansWrapper wrapper;
    private final TemplateSequenceModel model;
    
    SequenceAdapter(TemplateSequenceModel model, BeansWrapper wrapper) {
        this.model = model;
        this.wrapper = wrapper;
    }
    
    public TemplateModel getTemplateModel() {
        return model;
    }
    
    public int size() {
        try {
            return model.size();
        }
        catch(TemplateModelException e) {
            throw new UndeclaredThrowableException(e);
        }
    }
    
    public Object get(int index) {
        try {
            return wrapper.unwrap(model.get(index));
        }
        catch(TemplateModelException e) {
            throw new UndeclaredThrowableException(e);
        }
    }
    
    public TemplateSequenceModel getTemplateSequenceModel() {
        return model;
    }
    
}