/* | |
* 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.extensions.validator.core.renderkit; | |
import org.apache.myfaces.extensions.validator.internal.UsageCategory; | |
import org.apache.myfaces.extensions.validator.internal.UsageInformation; | |
import org.apache.myfaces.extensions.validator.core.ExtValContext; | |
import org.apache.myfaces.extensions.validator.util.ClassUtils; | |
import org.apache.commons.logging.Log; | |
import org.apache.commons.logging.LogFactory; | |
import javax.faces.context.FacesContext; | |
import javax.faces.render.Renderer; | |
import javax.faces.component.UIComponent; | |
import javax.faces.convert.ConverterException; | |
import java.io.IOException; | |
import java.lang.reflect.Constructor; | |
/** | |
* to support a custom proxy | |
* | |
* @author Gerhard Petracek | |
* @since 1.x.1 | |
*/ | |
@UsageInformation(UsageCategory.INTERNAL) | |
class ExtValLazyRendererProxy extends Renderer | |
{ | |
protected final Log logger = LogFactory.getLog(getClass()); | |
private Renderer wrapped; | |
public ExtValLazyRendererProxy(Renderer renderer) | |
{ | |
this.wrapped = renderer; | |
if(logger.isTraceEnabled()) | |
{ | |
logger.trace("simple proxy created for " + renderer.getClass().getName()); | |
} | |
} | |
@Override | |
public void decode(FacesContext facesContext, UIComponent uiComponent) | |
{ | |
getLazyRenderer().decode(facesContext, uiComponent); | |
} | |
@Override | |
public void encodeBegin(FacesContext facesContext, UIComponent uiComponent) | |
throws IOException | |
{ | |
getLazyRenderer().encodeBegin(facesContext, uiComponent); | |
} | |
@Override | |
public void encodeChildren(FacesContext facesContext, UIComponent uiComponent) | |
throws IOException | |
{ | |
getLazyRenderer().encodeChildren(facesContext, uiComponent); | |
} | |
@Override | |
public void encodeEnd(FacesContext facesContext, UIComponent uiComponent) | |
throws IOException | |
{ | |
getLazyRenderer().encodeEnd(facesContext, uiComponent); | |
} | |
@Override | |
public String convertClientId(FacesContext facesContext, String s) | |
{ | |
return getLazyRenderer().convertClientId(facesContext, s); | |
} | |
@Override | |
public boolean getRendersChildren() | |
{ | |
return getLazyRenderer().getRendersChildren(); | |
} | |
@Override | |
public Object getConvertedValue(FacesContext facesContext, UIComponent uiComponent, Object o) | |
throws ConverterException | |
{ | |
return getLazyRenderer().getConvertedValue(facesContext, uiComponent, o); | |
} | |
private Renderer getLazyRenderer() | |
{ | |
String proxyClassName = (String) ExtValContext.getContext().getGlobalProperty(ExtValRendererProxy.KEY); | |
if(proxyClassName != null && !proxyClassName.endsWith(getClass().getName())) | |
{ | |
Class targetClass = ClassUtils.tryToLoadClassForName(proxyClassName); | |
if(targetClass == null) | |
{ | |
throw new IllegalStateException("a custom invalid renderer proxy is configured: " + proxyClassName); | |
} | |
Class[] argClasses = new Class[1]; | |
argClasses[0] = Renderer.class; | |
try | |
{ | |
Constructor constructor = targetClass.getConstructor(argClasses); | |
return (Renderer)constructor.newInstance(this.wrapped); | |
} | |
catch (Throwable t) | |
{ | |
if(logger.isWarnEnabled()) | |
{ | |
logger.warn("couldn't create: " + targetClass.getName()); | |
} | |
return this.wrapped; | |
} | |
} | |
else | |
{ | |
return this.wrapped; | |
} | |
} | |
} |