jp.xet.uncommons.wicket.gp.StatelessDataView.java Source code

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Here is the source code for jp.xet.uncommons.wicket.gp.StatelessDataView.java

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/*
 * Copyright 2011 Daisuke Miyamoto.
 * Created on 2011/12/08
 *
 * 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 jp.xet.uncommons.wicket.gp;

import org.apache.wicket.markup.repeater.data.DataView;
import org.apache.wicket.markup.repeater.data.IDataProvider;
import org.apache.wicket.request.mapper.parameter.PageParameters;
import org.apache.wicket.util.lang.Args;

/**
 * TODO for daisuke
 * 
 * @param <T> The Model type.
 * @since 1.0
 * @version $Id$
 * @author daisuke
 */
@SuppressWarnings("serial")
public abstract class StatelessDataView<T> extends DataView<T> {

    /** TODO for daisuke */
    public static final String DEFAULT_PARAM_KEY_PAGE = "page";

    private final String paramKey;

    /**
     * ??
     * 
     * @param id The non-null id of this component
     * @param dataProvider data provider
     * @param itemsPerPage items per page
     * @param params
     */
    public StatelessDataView(String id, IDataProvider<T> dataProvider, int itemsPerPage, PageParameters params) {
        this(id, dataProvider, itemsPerPage, params, DEFAULT_PARAM_KEY_PAGE);
    }

    /**
     * ??
     * 
     * @param id The non-null id of this component
     * @param dataProvider data provider
     * @param itemsPerPage items per page
     * @param params
     * @param paramKey ?? {@link PageParameters}?
     */
    public StatelessDataView(String id, IDataProvider<T> dataProvider, int itemsPerPage, PageParameters params,
            String paramKey) {
        super(id, dataProvider, itemsPerPage);
        this.paramKey = paramKey;

        setCurrentPage(params, paramKey);
    }

    /**
     * ??
     * 
     * @param id The non-null id of this component
     * @param dataProvider data provider
     * @param params
     */
    public StatelessDataView(String id, IDataProvider<T> dataProvider, PageParameters params) {
        this(id, dataProvider, params, DEFAULT_PARAM_KEY_PAGE);
    }

    /**
     * ??
     * 
     * @param id The non-null id of this component
     * @param dataProvider data provider
     * @param params
     * @param paramKey 
     */
    public StatelessDataView(String id, IDataProvider<T> dataProvider, PageParameters params, String paramKey) {
        super(id, dataProvider);
        this.paramKey = paramKey;

        setCurrentPage(params, paramKey);
    }

    /**
     * TODO for daisuke
     * 
     * @return
     * @since 1.0
     */
    public String getParamKey() {
        return paramKey;
    }

    @Override
    protected boolean getStatelessHint() {
        return true;
    }

    /**
     * TODO for daisuke
     * 
     * @param params
     * @param paramKey
     * @throws IllegalArgumentException ?{@code null}???
     * @since 1.0
     */
    protected void setCurrentPage(PageParameters params, String paramKey) {
        Args.notNull(params, "params");
        Args.notNull(paramKey, "paramKey");
        String pageNumberStr = params.get(paramKey).toString("1");
        if (pageNumberStr.contains(".wicket-")) {
            pageNumberStr = pageNumberStr.substring(0, pageNumberStr.indexOf(".wicket-"));
        }

        int pageNumber = 0;
        try {
            pageNumber = Integer.valueOf(pageNumberStr);
        } catch (NumberFormatException e) {
            // ignore
        }
        if (0 < pageNumber && pageNumber <= getPageCount()) {
            setCurrentPage(pageNumber - 1);
        }
    }
}