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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.myfaces.custom.jsvalueset;
import org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HTML;
import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRenderer;
import org.apache.commons.lang.StringEscapeUtils;
import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import java.io.IOException;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
/**
* @JSFRenderer
* renderKitId = "HTML_BASIC"
* family = "javax.faces.Output"
* type = "org.apache.myfaces.JsValueSet"
*
* @author Martin Marinschek (latest modification by $Author: lu4242 $)
* @version $Revision: 659874 $ $Date: 2008-05-24 15:59:15 -0500 (Sat, 24 May 2008) $
*/
public class HtmlJsValueSetRenderer
extends HtmlRenderer
{
private void writeValue(String varName, StringBuffer valueSb, StringBuffer prependSb, Object value) throws IOException
{
if(value instanceof String || value instanceof Number || value instanceof Boolean || value == null)
{
valueSb.append(getValueString(value));
}
else if(value instanceof Object[])
{
Object[] objs = (Object[]) value;
valueSb.append("[");
String comma = "";
for (int i = 0; i < objs.length; i++)
{
valueSb.append(comma);
writeValue(varName + "_h" + i, valueSb, prependSb, objs[i]);
comma = ",";
}
valueSb.append("]");
}
else if(value instanceof Collection)
{
Collection coll = (Collection) value;
valueSb.append("[");
String comma = "";
int i = 0;
for (Iterator iterator = coll.iterator(); iterator.hasNext();)
{
valueSb.append(comma);
writeValue(varName + "_h" + i, valueSb, prependSb, iterator.next());
comma = ",";
i++;
}
valueSb.append("]");
}
else if(value instanceof Map)
{
Map map = (Map) value;
varName = varName + "_hm";
prependSb.append("var ").append(varName).append("=new Object();\n");
Iterator it = map.entrySet().iterator();
int i = 0;
while (it.hasNext())
{
Map.Entry entry = (Map.Entry) it.next();
StringBuffer helpValueSb = new StringBuffer();
StringBuffer helpHelpSb = new StringBuffer();
writeValue(varName + "_h" + i, helpValueSb, helpHelpSb, entry.getValue());
prependSb.append(helpHelpSb);
prependSb.append(varName).append("[").append(getValueString(entry.getKey())).append("]=");
prependSb.append(helpValueSb).append(";\n");
i++;
}
valueSb.append(varName);
}
else
throw new IOException("Type of value not handled. Allowed are String, Number, Boolean, Object[], Collection, Map. Type of value : "+value.getClass());
}
public void encodeEnd(FacesContext facesContext, UIComponent component)
throws IOException
{
RendererUtils.checkParamValidity(facesContext, component, HtmlJsValueSet.class);
HtmlJsValueSet jsValue = (HtmlJsValueSet) component;
Object value = jsValue.getValue();
String varName = jsValue.getName();
ResponseWriter writer = getFacesContext().getResponseWriter();
writer.startElement(HTML.SCRIPT_ELEM, null);
writer.writeAttribute(HTML.SCRIPT_TYPE_ATTR, HTML.SCRIPT_TYPE_TEXT_JAVASCRIPT, null);
StringBuffer valueSb = new StringBuffer("var " + varName + "=");
StringBuffer prependSb = new StringBuffer("");
writeValue(varName, valueSb, prependSb, value);
writer.write(prependSb.toString());
writer.write(valueSb.toString() + ";\n");
writer.endElement(HTML.SCRIPT_ELEM);
}
private String getValueString(Object value) throws IOException
{
if(value instanceof String)
{
return "'"+StringEscapeUtils.escapeJavaScript(value.toString())+"'";
}
else if(value instanceof Number)
{
return value.toString();
}
else if(value instanceof Boolean)
{
return value.toString();
}
else if(value == null)
{
return "null";
}
else
{
throw new IOException("value : "+value+" is of type : "+value.getClass()+
", provide a method to convert this.");
}
}
protected Application getApplication()
{
return getFacesContext().getApplication();
}
protected FacesContext getFacesContext()
{
return FacesContext.getCurrentInstance();
}
}