freemarker.template.IteratorToTemplateModelIteratorAdapter 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.

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/*
 * 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.template;

import java.util.Iterator;
import java.util.NoSuchElementException;

/**
 * Unlike {@link DefaultIteratorAdapter}, this doesn't adapt to some {@link TemplateModel}, but to {@link
 * TemplateModelIterator}.
 */
class IteratorToTemplateModelIteratorAdapter implements TemplateModelIterator {

    private final Iterator it;
    private final ObjectWrapper wrapper;

    IteratorToTemplateModelIteratorAdapter(Iterator it, ObjectWrapper wrapper) {
        this.it = it;
        this.wrapper = wrapper;
    }

    @Override
    public TemplateModel next() throws TemplateModelException {
        try {
            return wrapper.wrap(it.next());
        } catch (NoSuchElementException e) {
            throw new TemplateModelException("The collection has no more items.", e);
        }
    }

    @Override
    public boolean hasNext() throws TemplateModelException {
        return it.hasNext();
    }

}