| /* |
| * Copyright 2001-2004 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.axis.encoding.ser; |
| |
| import org.apache.axis.Constants; |
| import org.apache.axis.components.logger.LogFactory; |
| import org.apache.axis.encoding.Deserializer; |
| import org.apache.axis.encoding.DeserializerFactory; |
| import org.apache.axis.i18n.Messages; |
| import org.apache.commons.logging.Log; |
| |
| import javax.xml.namespace.QName; |
| import javax.xml.rpc.JAXRPCException; |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.Iterator; |
| import java.util.Vector; |
| |
| /** |
| * Base class for Axis Deserialization Factory classes for code reuse |
| * |
| * @author Rich Scheuerle <scheu@us.ibm.com> |
| */ |
| public abstract class BaseDeserializerFactory extends BaseFactory |
| implements DeserializerFactory { |
| |
| protected static Log log = |
| LogFactory.getLog(BaseDeserializerFactory.class.getName()); |
| |
| transient static Vector mechanisms = null; |
| |
| protected Class deserClass = null; |
| protected QName xmlType = null; |
| protected Class javaType = null; |
| |
| transient protected Constructor deserClassConstructor = null; |
| transient protected Method getDeserializer = null; |
| |
| /** |
| * Constructor |
| * @param deserClass is the class of the Deserializer |
| */ |
| public BaseDeserializerFactory(Class deserClass) { |
| if (!Deserializer.class.isAssignableFrom(deserClass)) { |
| throw new ClassCastException( |
| Messages.getMessage("BadImplementation00", |
| deserClass.getName(), |
| Deserializer.class.getName())); |
| } |
| this.deserClass = deserClass; |
| } |
| |
| public BaseDeserializerFactory(Class deserClass, |
| QName xmlType, |
| Class javaType) { |
| this(deserClass); |
| this.xmlType = xmlType; |
| this.javaType = javaType; |
| } |
| |
| public javax.xml.rpc.encoding.Deserializer |
| getDeserializerAs(String mechanismType) |
| throws JAXRPCException { |
| Deserializer deser = null; |
| |
| // Need to add code to check against mechanisms vector. |
| |
| // Try getting a specialized Deserializer |
| deser = getSpecialized(mechanismType); |
| |
| // Try getting a general purpose Deserializer via constructor |
| // invocation |
| if (deser == null) { |
| deser = getGeneralPurpose(mechanismType); |
| } |
| |
| try { |
| // If not successfull, try newInstance |
| if (deser == null) { |
| deser = (Deserializer) deserClass.newInstance(); |
| } |
| } catch (Exception e) { |
| throw new JAXRPCException(e); |
| } |
| return deser; |
| } |
| |
| /** |
| * Obtains a deserializer by invoking <constructor>(javaType, xmlType) |
| * on the deserClass. |
| */ |
| protected Deserializer getGeneralPurpose(String mechanismType) { |
| if (javaType != null && xmlType != null) { |
| Constructor deserClassConstructor = getDeserClassConstructor(); |
| if (deserClassConstructor != null) { |
| try { |
| return (Deserializer) |
| deserClassConstructor.newInstance( |
| new Object[] {javaType, xmlType}); |
| } catch (InstantiationException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } catch (IllegalAccessException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } catch (InvocationTargetException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } |
| } |
| } |
| return null; |
| } |
| |
| private static final Class[] CLASS_QNAME_CLASS = new Class[] {Class.class, QName.class}; |
| |
| /** |
| * return constructor for class if any |
| */ |
| private Constructor getConstructor(Class clazz) { |
| try { |
| return clazz.getConstructor(CLASS_QNAME_CLASS); |
| } catch (NoSuchMethodException e) {} |
| return null; |
| } |
| |
| /** |
| * Obtains a deserializer by invoking getDeserializer method in the |
| * javaType class or its Helper class. |
| */ |
| protected Deserializer getSpecialized(String mechanismType) { |
| if (javaType != null && xmlType != null) { |
| Method getDeserializer = getGetDeserializer(); |
| if (getDeserializer != null) { |
| try { |
| return (Deserializer) |
| getDeserializer.invoke( |
| null, |
| new Object[] {mechanismType, |
| javaType, |
| xmlType}); |
| } catch (IllegalAccessException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } catch (InvocationTargetException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Returns a list of all XML processing mechanism types supported by this DeserializerFactory. |
| * |
| * @return List of unique identifiers for the supported XML processing mechanism types |
| */ |
| public Iterator getSupportedMechanismTypes() { |
| if (mechanisms == null) { |
| mechanisms = new Vector(1); |
| mechanisms.add(Constants.AXIS_SAX); |
| } |
| return mechanisms.iterator(); |
| } |
| |
| /** |
| * Utility method that intospects on a factory class to decide how to |
| * create the factory. Tries in the following order: |
| * public static create(Class javaType, QName xmlType) |
| * public <constructor>(Class javaType, QName xmlType) |
| * public <constructor>() |
| * @param factory class |
| * @param javaType |
| * @param xmlType |
| */ |
| public static DeserializerFactory createFactory(Class factory, |
| Class javaType, |
| QName xmlType) { |
| if (factory == null) { |
| return null; |
| } |
| |
| try { |
| if (factory == BeanDeserializerFactory.class) { |
| return new BeanDeserializerFactory(javaType, xmlType); |
| } else if (factory == SimpleDeserializerFactory.class) { |
| return new SimpleDeserializerFactory(javaType, xmlType); |
| } else if (factory == EnumDeserializerFactory.class) { |
| return new EnumDeserializerFactory(javaType, xmlType); |
| } else if (factory == ElementDeserializerFactory.class) { |
| return new ElementDeserializerFactory(); |
| } else if (factory == SimpleListDeserializerFactory.class) { |
| return new SimpleListDeserializerFactory(javaType, xmlType); |
| } |
| } catch (Exception e) { |
| if (log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| return null; |
| } |
| |
| DeserializerFactory df = null; |
| try { |
| Method method = |
| factory.getMethod("create", CLASS_QNAME_CLASS); |
| df = (DeserializerFactory) |
| method.invoke(null, |
| new Object[] {javaType, xmlType}); |
| } catch (NoSuchMethodException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } catch (IllegalAccessException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } catch (InvocationTargetException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } |
| |
| if (df == null) { |
| try { |
| Constructor constructor = |
| factory.getConstructor(CLASS_QNAME_CLASS); |
| df = (DeserializerFactory) |
| constructor.newInstance( |
| new Object[] {javaType, xmlType}); |
| } catch (NoSuchMethodException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } catch (InstantiationException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } catch (IllegalAccessException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } catch (InvocationTargetException e) { |
| if(log.isDebugEnabled()) { |
| log.debug(org.apache.axis.utils.Messages.getMessage("exception00"), e); |
| } |
| } |
| } |
| |
| if (df == null) { |
| try { |
| df = (DeserializerFactory) factory.newInstance(); |
| } catch (InstantiationException e) { |
| } catch (IllegalAccessException e) {} |
| } |
| return df; |
| } |
| /** |
| * Returns the deserClassConstructor. |
| * @return Constructor |
| */ |
| protected Constructor getDeserClassConstructor() { |
| if (deserClassConstructor == null) { |
| deserClassConstructor = getConstructor(deserClass); |
| } |
| return deserClassConstructor; |
| } |
| |
| /** |
| * Returns the getDeserializer. |
| * @return Method |
| */ |
| protected Method getGetDeserializer() { |
| if (getDeserializer == null) { |
| getDeserializer = getMethod(javaType,"getDeserializer"); |
| } |
| return getDeserializer; |
| } |
| |
| } |
