com.edgenius.wiki.render.handler.PageAttributeHandler.java Source code

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Here is the source code for com.edgenius.wiki.render.handler.PageAttributeHandler.java

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/* 
 * =============================================================
 * Copyright (C) 2007-2011 Edgenius (http://www.edgenius.com)
 * =============================================================
 * License Information: http://www.edgenius.com/licensing/edgenius/2.0/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2.0
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * http://www.gnu.org/licenses/gpl.txt
 *  
 * ****************************************************************
 */
package com.edgenius.wiki.render.handler;

import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;

import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;

import com.edgenius.wiki.gwt.client.model.RenderPiece;
import com.edgenius.wiki.gwt.client.server.utils.PageAttribute;
import com.edgenius.wiki.model.AbstractPage;
import com.edgenius.wiki.render.RenderContext;
import com.edgenius.wiki.render.object.ObjectHandler;

/**
 * @author Dapeng.Ni
 */
public class PageAttributeHandler implements ObjectHandler {
    private static final Logger log = LoggerFactory.getLogger(PageAttributeHandler.class);
    private AbstractPage page;

    //sum up page attribute, from java field name....
    public static final Map<String, Integer> attributeNames = new HashMap<String, Integer>();
    static {
        Field[] fields = PageAttribute.class.getDeclaredFields();
        for (Field field : fields) {
            if (field.getName().startsWith(PageAttribute.ATTRIBUTE_PREFIX)) {
                try {
                    attributeNames.put(
                            field.getName().substring(PageAttribute.ATTRIBUTE_PREFIX.length()).toLowerCase(),
                            field.getInt(null));
                } catch (Exception e) {
                    log.error("Unable to build page attribute fields list");
                }
            }
        }
    }

    public List<RenderPiece> handle(RenderContext renderContext, Map<String, String> values) {
        int attribute = 0;
        //sort out value from PageAttribute class NO_ prefix fields
        Set<Entry<String, Integer>> entries = attributeNames.entrySet();
        for (Entry<String, Integer> entry : entries) {
            String val = values.get(entry.getKey());
            if (StringUtils.equalsIgnoreCase(val, "false") || StringUtils.equalsIgnoreCase(val, "no")) {
                attribute |= entry.getValue();
                log.info("page attribute '" + entry.getKey() + "' set to false.");
            }
        }
        page.setAttribute(attribute);

        return null;

    }

    public void init(ApplicationContext context) {

    }

    public void renderEnd() {
        page = null;
    }

    public void renderStart(AbstractPage page) {
        this.page = page;
    }

}