BeanProviderPropertyAccessor.java
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org.apache.tapestry.bean |
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Apache Tapestry 4 |
View: Reasons, Metrics, Source Code
These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
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// Copyright 2004, 2005 The Apache Software Foundation
//
// 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 org.apache.tapestry.bean;
import java.util.Map;
import ognl.ObjectPropertyAccessor;
import ognl.OgnlContext;
import ognl.OgnlException;
import ognl.OgnlRuntime;
import ognl.PropertyAccessor;
import ognl.enhance.ExpressionCompiler;
import ognl.enhance.UnsupportedCompilationException;
import org.apache.tapestry.IBeanProvider;
/**
* Adapts a {@link org.apache.tapestry.IBeanProvider} to
* <a href="http://www.ognl.org">OGNL</a> by exposing the named
* beans provided by the provider as read-only properties of
* the provider.
*
* <p>This is registered by {@link org.apache.tapestry.AbstractComponent}.
*
* @author Howard Lewis Ship
* @since 2.2
*
**/
public class BeanProviderPropertyAccessor extends ObjectPropertyAccessor implements PropertyAccessor
{
/**
* Checks to see if the name matches the name of a bean inside
* the provider and returns that bean if so.
* Otherwise, invokes the super implementation.
*
**/
public Object getProperty(Map context, Object target, Object name) throws OgnlException
{
IBeanProvider provider = (IBeanProvider)target;
String beanName = (String)name;
if (provider.canProvideBean(beanName))
return provider.getBean(beanName);
return super.getProperty(context, target, name);
}
/**
* Returns true if the name matches a bean provided by the provider.
* Otherwise invokes the super implementation.
*
**/
public boolean hasGetProperty(Map context, Object target, Object oname) throws OgnlException
{
IBeanProvider provider = (IBeanProvider)target;
String beanName = ((String)oname).replaceAll("\"", "");
if (provider.canProvideBean(beanName))
return true;
return super.hasGetProperty(context, target, oname);
}
public Class getPropertyClass(OgnlContext context, Object target, Object name)
{
IBeanProvider provider = (IBeanProvider)target;
String beanName = ((String)name).replaceAll("\"", "");
if (provider.canProvideBean(beanName))
return provider.getBean(beanName).getClass();
return super.getPropertyClass(context, target, name);
}
public String getSourceAccessor(OgnlContext context, Object target, Object name)
{
IBeanProvider provider = (IBeanProvider)target;
String beanName = ((String)name).replaceAll("\"", "");
if (provider.canProvideBean(beanName)) {
Class type = OgnlRuntime.getCompiler().getInterfaceClass(provider.getBean(beanName).getClass());
ExpressionCompiler.addCastString(context, "((" + type.getName() + ")");
context.setCurrentAccessor(IBeanProvider.class);
context.setCurrentType(type);
return ".getBean(" + name + "))";
}
return super.getSourceAccessor(context, target, name);
}
public String getSourceSetter(OgnlContext context, Object target, Object name)
{
throw new UnsupportedCompilationException("Can't set beans on IBeanProvider.");
}
}
The table below shows all metrics for BeanProviderPropertyAccessor.java.
| Metric | Value | Description | |
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