org.drools.runtime.pipeline.impl.JaxbFromXmlTransformer Maven / Gradle / Ivy
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Legacy alternative to drools-camel.
/*
* Copyright 2010 JBoss Inc
*
* 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.drools.runtime.pipeline.impl;
import java.io.File;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringReader;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.Source;
import org.drools.io.Resource;
import org.drools.runtime.pipeline.PipelineContext;
import org.drools.runtime.pipeline.Transformer;
import org.xml.sax.InputSource;
public class JaxbFromXmlTransformer extends BaseEmitter
implements
Transformer {
private Unmarshaller unmarshaller;
public JaxbFromXmlTransformer(Unmarshaller unmarshaller) {
this.unmarshaller = unmarshaller;
}
public void receive(Object object,
PipelineContext context) {
Object result = null;
try {
if ( object instanceof File ) {
result = this.unmarshaller.unmarshal( (File) object );
} else if ( object instanceof InputStream ) {
result = this.unmarshaller.unmarshal( (InputStream) object );
} else if ( object instanceof Reader ) {
result = this.unmarshaller.unmarshal( (Reader) object );
} else if ( object instanceof Source ) {
result = this.unmarshaller.unmarshal( (Source) object );
} else if ( object instanceof InputSource ) {
result = this.unmarshaller.unmarshal( (InputSource) object );
} else if ( object instanceof Resource ) {
result = this.unmarshaller.unmarshal( (( Resource ) object).getReader() );
} else if ( object instanceof String ) {
result = this.unmarshaller.unmarshal( new StringReader( ( String ) object ) );
} else {
throw new IllegalArgumentException( "signal object must be instance of File, InputStream, Reader, Source, InputSource, Resource, String" );
}
} catch ( Exception e ) {
handleException( this,
object,
e );
}
if ( result instanceof JAXBElement ) {
result = ((JAXBElement) object).getValue();
}
emit( result,
context );
}
}