org.shept.persistence.provider.hibernate.HibernateExampleListProviderImpl.java Source code

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Here is the source code for org.shept.persistence.provider.hibernate.HibernateExampleListProviderImpl.java

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/*
 * Copyright 2007-2011 the original author or authors.
 *
 * 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 org.shept.persistence.provider.hibernate;

import java.util.Collections;
import java.util.List;

import org.springframework.beans.support.SortDefinition;

/** 
 * @version $$Id: HibernateExampleListProviderImpl.java 34 2010-08-20 16:46:49Z aha $$
 *
 * @author Andi
 *
 */
public class HibernateExampleListProviderImpl extends AbstractHibernateListProvider {

    private Object example;

    private SortDefinition sortDef;

    /* (non-Javadoc)
     * @see org.shept.provider.AbstractScrollingListProvider#loadListFirst()
     */
    @Override
    public List<?> loadListFirst() {
        loaded = 0;
        eol = false;
        List<?> l = Collections.EMPTY_LIST;

        // The criteria MUST be reloaded on loadListFirst else we would miss 
        // changes of the underlying filter
        example = getFilterDefinition();
        sortDef = getSortDefinition();
        if (loadSize > 0) {
            l = getHibernateTemplate().findByExample(example, sortDef, loaded, loadSize);
        } else {
            l = getHibernateTemplate().findByExample(example, sortDef);
            eol = true;
        }
        incrementLoadSizeAfterFetch(l.size());
        return l;
    }

    /* (non-Javadoc)
     * @see org.shept.provider.AbstractScrollingListProvider#loadListNext()
     */
    @Override
    public List<?> loadListNext() {
        List<?> l = Collections.EMPTY_LIST;
        if (!eol) {
            l = getHibernateTemplate().findByExample(example, sortDef, loaded, loadSize);
            incrementLoadSizeAfterFetch(l.size());
        }
        return l;
    }

}