/*
* 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.uima.impl;
import java.util.Map;
import org.apache.uima.Constants;
import org.apache.uima.ResourceFactory;
import org.apache.uima.collection.CollectionReaderDescription;
import org.apache.uima.collection.CollectionReader_ImplBase;
import org.apache.uima.collection.base_cpm.BaseCollectionReader;
import org.apache.uima.resource.Resource;
import org.apache.uima.resource.ResourceInitializationException;
import org.apache.uima.resource.ResourceManager;
import org.apache.uima.resource.ResourceSpecifier;
import org.apache.uima.resource.metadata.ProcessingResourceMetaData;
/**
* Specialized Resource Factory for producing CollectionReaders.
*
*/
public class CollectionReaderFactory_impl implements ResourceFactory {
/**
* @see org.apache.uima.ResourceFactory#produceResource(java.lang.Class,
* org.apache.uima.resource.ResourceSpecifier, java.util.Map)
*/
public Resource produceResource(Class<? extends Resource> aResourceClass, ResourceSpecifier aSpecifier,
Map<String, Object> aAdditionalParams) throws ResourceInitializationException {
if (aSpecifier instanceof CollectionReaderDescription) {
CollectionReaderDescription desc = (CollectionReaderDescription) aSpecifier;
//check framework implementation (CollectionReaders only supported in Java)
String frameworkImpl = desc.getFrameworkImplementation();
if (frameworkImpl == null || frameworkImpl.length() == 0) {
throw new ResourceInitializationException(
ResourceInitializationException.MISSING_FRAMEWORK_IMPLEMENTATION,
new Object[] { aSpecifier.getSourceUrlString() });
}
if (!frameworkImpl.startsWith(Constants.JAVA_FRAMEWORK_NAME)) {
throw new ResourceInitializationException(
ResourceInitializationException.UNSUPPORTED_FRAMEWORK_IMPLEMENTATION,
new Object[] { desc.getFrameworkImplementation(), aSpecifier.getSourceUrlString() });
}
String className = desc.getImplementationName();
if (className == null || className.length() == 0) {
throw new ResourceInitializationException(
ResourceInitializationException.MISSING_IMPLEMENTATION_CLASS_NAME,
new Object[] {aSpecifier.getSourceUrlString()});
}
// load class using UIMA Extension ClassLoader if there is one
ClassLoader cl = null;
ResourceManager resourceManager = null;
if (aAdditionalParams != null) {
resourceManager = (ResourceManager) aAdditionalParams.get(Resource.PARAM_RESOURCE_MANAGER);
}
if (resourceManager != null) {
cl = resourceManager.getExtensionClassLoader();
}
if (cl == null) {
cl = this.getClass().getClassLoader();
}
try {
Class<?> implClass = Class.forName(className, true, cl);
// check to see if this is a subclass of BaseCollectionReader and of aResourceClass
if (!BaseCollectionReader.class.isAssignableFrom(implClass)) {
throw new ResourceInitializationException(
ResourceInitializationException.NOT_A_COLLECTION_READER, new Object[] {
className, aSpecifier.getSourceUrlString() });
}
if (!aResourceClass.isAssignableFrom(implClass)) {
throw new ResourceInitializationException(
ResourceInitializationException.RESOURCE_DOES_NOT_IMPLEMENT_INTERFACE,
new Object[] { className, aResourceClass.getName(),
aSpecifier.getSourceUrlString() });
}
// instantiate this Resource Class
Resource resource = (Resource) implClass.newInstance();
// attempt to initialize it
if (resource.initialize(aSpecifier, aAdditionalParams)) {
// success!
// Next: see Jira UIMA-554
(((CollectionReader_ImplBase)resource).getCasManager()).addMetaData(
(ProcessingResourceMetaData) resource.getMetaData().clone());
return resource;
} else // failure, for some unknown reason :( This isn't likely to happen
{
throw new ResourceInitializationException(
ResourceInitializationException.ERROR_INITIALIZING_FROM_DESCRIPTOR, new Object[] {
className, aSpecifier.getSourceUrlString() });
}
}
// if an exception occurs, log it but do not throw it... yet
catch (ClassNotFoundException e) {
throw new ResourceInitializationException(ResourceInitializationException.CLASS_NOT_FOUND,
new Object[] { className, aSpecifier.getSourceUrlString() }, e);
} catch (IllegalAccessException e) {
throw new ResourceInitializationException(
ResourceInitializationException.COULD_NOT_INSTANTIATE, new Object[] { className,
aSpecifier.getSourceUrlString() }, e);
} catch (InstantiationException e) {
throw new ResourceInitializationException(
ResourceInitializationException.COULD_NOT_INSTANTIATE, new Object[] { className,
aSpecifier.getSourceUrlString() }, e);
}
} else // not a CR descriptor
{
return null;
}
}
}