UrlClickEvent.java

/*
 *  Copyright 2012 The Solmix Project
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.gnu.org/licenses/ 
 * or see the FSF site: http://www.fsf.org. 
 */

package org.solmix.sgt.client.event;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import org.solmix.sgt.client.Action;
import org.solmix.sgt.client.EviewType;

import com.google.gwt.event.shared.GwtEvent;
import com.google.inject.Inject;
import com.gwtplatform.common.client.ClientUrlUtils;
import com.gwtplatform.mvp.shared.proxy.ParameterTokenFormatter;
import com.gwtplatform.mvp.shared.proxy.PlaceRequest;
import com.gwtplatform.mvp.shared.proxy.TokenFormatter;

/**
 * 
 * @author solmix.f@gmail.com
 * @version 110035 2013-1-14
 */

public class UrlClickEvent extends GwtEvent<UrlClickHandler>
{

    private static Type<UrlClickHandler> TYPE;

    @Inject
    private  TokenFormatter tokenformatter;

    private final Map<String,Object> parameters;

    private final String action;

    public UrlClickEvent(String urlParams)
    {
        if(tokenformatter==null){
            tokenformatter= new ParameterTokenFormatter(new ClientUrlUtils());
        }
        PlaceRequest place = tokenformatter.toPlaceRequest(urlParams);
        action = place.getNameToken();
        parameters = new HashMap<String,Object>();
        Set<String> params = place.getParameterNames();
        for (String param : params) {
            if (param.equals(EviewType.P_VIEW_TYPE) || param.equals(Action.P_MODULE) || param.equals(Action.ACTION))
                continue;
            parameters.put(param, place.getParameter(param, null));
        }

    }

    public Map<String,Object> getParameters() {
        if (this.parameters == null) {
            return Collections.emptyMap();
        } else {
            return this.parameters;
        }
    }

    public String getAction() {
        return this.action;
    }

    public Object getParameter(String key, String defaultValue) {
        Object value = null;

        if (parameters != null) {
            value = parameters.get(key);
        }

        if (value == null) {
            value = defaultValue;
        }
        return value;
    }

    public Set<String> getParameterNames() {
        if (parameters != null) {
            return parameters.keySet();
        } else {
            return Collections.emptySet();
        }
    }

    /**
     * {@inheritDoc}
     * 
     * @see com.google.gwt.event.shared.GwtEvent#dispatch(com.google.gwt.event.shared.EventHandler)
     */
    @Override
    protected void dispatch(UrlClickHandler handler) {
        handler.onUrlClick(this);

    }

    /**
     * {@inheritDoc}
     * 
     * @see com.google.gwt.event.shared.GwtEvent#getAssociatedType()
     */
    @Override
    public com.google.gwt.event.shared.GwtEvent.Type<UrlClickHandler> getAssociatedType() {
        return getType();
    }

    public static Type<UrlClickHandler> getType() {
        if (TYPE == null) {
            TYPE = new Type<UrlClickHandler>();
        }
        return TYPE;
    }
}