it.av.youeat.web.page.manager.data.CommentsSortableDataProvider.java Source code

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Here is the source code for it.av.youeat.web.page.manager.data.CommentsSortableDataProvider.java

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/**
 * Copyright 2009 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 it.av.youeat.web.page.manager.data;

import it.av.youeat.YoueatException;
import it.av.youeat.ocm.model.Comment;
import it.av.youeat.service.CommentService;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;

import org.apache.commons.lang.StringUtils;
import org.apache.wicket.extensions.markup.html.repeater.util.SortableDataProvider;
import org.apache.wicket.injection.Injector;
import org.apache.wicket.model.IModel;
import org.apache.wicket.spring.injection.annot.SpringBean;

/**
 * 
 * @author <a href='mailto:a.vincelli@gmail.com'>Alessandro Vincelli</a>
 * 
 */
public class CommentsSortableDataProvider extends SortableDataProvider<Comment> {
    private static final long serialVersionUID = 1L;
    @SpringBean
    private CommentService commentService;
    private transient Collection<Comment> results;
    private boolean attached;

    /**
     * Constructor
     */
    public CommentsSortableDataProvider() {
        super();
        Injector.get().inject(this);
        results = new ArrayList<Comment>(0);
        attached = true;
        // setSort(LightVac.SortedFieldNames.dateTime.value(), true);
    }

    /**
     * 
     * @see org.apache.wicket.markup.repeater.data.IDataProvider#iterator(int, int)
     */
    @Override
    public final Iterator<Comment> iterator(int first, int count) {
        return Collections.synchronizedList(new ArrayList<Comment>(results)).subList(first, first + count)
                .iterator();
    }

    /**
     * 
     * @see org.apache.wicket.markup.repeater.data.IDataProvider#size()
     */
    @Override
    public final int size() {
        if (results != null) {
            return results.size();
        } else {
            return 0;
        }
    }

    /**
     * @param ristorcommentante
     * @return IModel<Ristorante>
     * 
     * @see org.apache.wicket.markup.repeater.data.IDataProvider#model(java.lang.Object)
     */
    @Override
    public final IModel<Comment> model(Comment comment) {
        return new CommentDetachableModel(comment);
    }

    /**
     * @see org.apache.wicket.model.IDetachable#detach()
     */
    @Override
    public void detach() {
        if (attached) {
            attached = false;
            results = new ArrayList<Comment>(0);
        }
    }

    /**
     * Performs the search
     * 
     * @param pattern the string to use in the search
     * @throws YoueatException
     */
    public final void fetchResults(String pattern) throws YoueatException {
        if (StringUtils.isNotBlank(pattern)) {
            results = commentService.find(pattern, 0, 0, Comment.CREATIONTIME_FIELD, false);
        }
    }

}