package org.apache.torque.generator.configuration.outlet;
/*
* 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.
*/
import static org.apache.torque.generator.configuration.mergepoint.MergepointConfigurationTags.MERGEPOINT_TAG;
import static org.apache.torque.generator.configuration.outlet.OutletConfigurationTags.INPUT_TAG;
import static org.apache.torque.generator.configuration.outlet.OutletConfigurationTags.OUTLET_CLASS_ATTRIBUTE;
import static org.apache.torque.generator.configuration.outlet.OutletConfigurationTags.OUTLET_NAME_ATTRIBUTE;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.torque.generator.configuration.ConfigurationHandlers;
import org.apache.torque.generator.configuration.ConfigurationProvider;
import org.apache.torque.generator.configuration.paths.ProjectPaths;
import org.apache.torque.generator.outlet.Outlet;
import org.apache.torque.generator.qname.QualifiedName;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
* Handles a declaration of a java outlet within a outlet configuration
* file.
*/
class JavaOutletSaxHandler extends OutletSaxHandler
{
/** The logger of the class. */
private static Log log = LogFactory.getLog(JavaOutletSaxHandler.class);
/** the name of the property which is currently processed. */
private String propertyName;
/** The value of the property which is currently processed. */
private StringBuffer propertyValue;
/** The current nesting level inside the processed element. */
private int level = 0;
/**
* Constructor.
*
* @param outletName the name for the outlet which configuration
* will be read in by the generated SaxHandlerFactory,
* or null if the name of the outlet should be determined from
* the parsed xml.
* @param configurationProvider The access object for the configuration
* files, not null.
* @param projectPaths The paths of the surrounding project, not null.
* @param configurationHandlers the available configuration handlers,
* not null.
*
* @throws SAXException if an error occurs during creation of the outlet.
*/
public JavaOutletSaxHandler(
QualifiedName outletName,
ConfigurationProvider configurationProvider,
ProjectPaths projectPaths,
ConfigurationHandlers configurationHandlers)
throws SAXException
{
super(outletName,
configurationProvider,
projectPaths,
configurationHandlers);
}
/**
* Instantiates a java outlet.
*
* @param outletName the name for the outlet which configuration
* will be read in by the generated SaxHandlerFactory,
* or null if the name of the outlet should be determined from
* the parsed xml.
* @param uri - The Namespace URI, or the empty string if the
* element has no Namespace URI or if Namespace processing is not
* being performed.
* @param localName - The local name (without prefix), or
* the empty string if Namespace processing is not being performed.
* @param rawName - The qualified name (with prefix), or the empty string if
* qualified names are not available.
* @param attributes - The attributes attached to the element.
* If there are no attributes, it shall be an empty Attributes
* object.
*
* @return the created outlet, not null.
*
* @throws SAXException if an error occurs during creation.
*/
protected Outlet createOutlet(
QualifiedName outletName,
String uri,
String localName,
String rawName,
Attributes attributes)
throws SAXException
{
if (outletName == null)
{
String nameAttribute
= attributes.getValue(OUTLET_NAME_ATTRIBUTE);
if (nameAttribute == null)
{
throw new SAXException("The attribute "
+ OUTLET_NAME_ATTRIBUTE
+ " must be set on the element "
+ rawName
+ " for Java Outlets");
}
outletName = new QualifiedName(nameAttribute);
}
String className;
{
className = attributes.getValue(OUTLET_CLASS_ATTRIBUTE);
if (className == null)
{
throw new SAXException("The attribute "
+ OUTLET_CLASS_ATTRIBUTE
+ " must be set on the element "
+ rawName
+ " for java Outlets");
}
}
Class<?> outletClass;
try
{
outletClass = Class.forName(className);
}
catch (ClassNotFoundException e)
{
throw new SAXException(
"Error while initializing the java outlet "
+ outletName
+ " : Could not load class " + className, e);
}
catch (ExceptionInInitializerError e)
{
log.error(
"Error while initializing the java outlet "
+ outletName
+ " : Could not initialize class " + className
+ " : " + e.getMessage());
throw e;
}
catch (LinkageError e)
{
log.error(
"Error while initializing the java outlet "
+ outletName
+ " : Could not link class " + className
+ " : " + e.getMessage());
throw e;
}
Outlet result;
try
{
Constructor<?> constructor
= outletClass.getConstructor(QualifiedName.class);
result = (Outlet) constructor.newInstance(outletName);
}
catch (NoSuchMethodException e)
{
throw new SAXException(
"Error while instantiating the java outlet "
+ outletName
+ " : The class " + className
+ " has no constructor which takes a qualified name",
e);
}
catch (ClassCastException e)
{
throw new SAXException(
"Error while instantiating the java outlet "
+ outletName
+ " : The class " + className
+ " is not an instance of "
+ Outlet.class.getName(),
e);
}
catch (IllegalAccessException e)
{
throw new SAXException(
"Error while instantiating the java outlet "
+ outletName
+ " : The constructor of class "
+ className + " could not be accessed",
e);
}
catch (InvocationTargetException e)
{
throw new SAXException(
"Error while instantiating the java outlet "
+ outletName
+ " : The constructor of class "
+ className + " could not be called",
e);
}
catch (InstantiationException e)
{
throw new SAXException(
"Error while instantiating the java outlet "
+ outletName
+ " : The class " + className
+ " represents an abstract class, "
+ "an interface, an array class, a primitive type, "
+ "or void, or the class has no parameterless constructor, "
+ "or the instantiation fails for some other reason.",
e);
}
catch (SecurityException e)
{
throw new SAXException(
"Error while instantiating the java outlet "
+ outletName
+ " : The security manager denies instantiation",
e);
}
return result;
}
/**
* {@inheritDoc}
*/
@Override
public void startElement(
String uri,
String localName,
String rawName,
Attributes attributes)
throws SAXException
{
level++;
if ((level == 2 && MERGEPOINT_TAG.equals(rawName))
|| super.isProcessingMergepointTag())
{
super.startElement(uri, localName, rawName, attributes);
}
else if (level == 2 && INPUT_TAG.equals(rawName))
{
super.startElement(uri, localName, rawName, attributes);
}
else if (level > 1)
{
propertyName = rawName;
propertyValue = new StringBuffer();
}
else
{
super.startElement(uri, localName, rawName, attributes);
}
}
/**
* {@inheritDoc}
*/
@Override
public void endElement(String uri, String localName, String rawName)
throws SAXException
{
level--;
if (propertyName != null)
{
if (!PropertyUtils.isWriteable(getOutlet(), propertyName))
{
throw new SAXException("No setter found for property "
+ propertyName
+ " in class "
+ getOutlet().getClass().getName());
}
try
{
BeanUtils.copyProperty(
getOutlet(), propertyName, propertyValue.toString());
}
catch (InvocationTargetException e)
{
throw new SAXException("error while setting Property "
+ propertyName
+ " for java outlet "
+ getOutlet().getName()
+ " with value "
+ propertyValue.toString(),
e);
}
catch (IllegalAccessException e)
{
throw new SAXException("error while setting Property "
+ propertyName
+ " for java outlet "
+ getOutlet().getName()
+ " with value "
+ propertyValue.toString(),
e);
}
propertyName = null;
propertyValue = null;
}
else
{
super.endElement(uri, localName, rawName);
}
}
/**
* {@inheritDoc}
*/
@Override
public void characters(char[] ch, int start, int length)
throws SAXException
{
if (propertyName == null)
{
return;
}
for (int i = start; i < start + length; ++i)
{
propertyValue.append(ch[i]);
}
}
}