| /** |
| * 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.xml.security.stax.impl.transformer; |
| |
| import org.apache.xml.security.exceptions.XMLSecurityException; |
| import org.apache.xml.security.stax.ext.Transformer; |
| import org.apache.xml.security.stax.ext.XMLSecurityConstants; |
| import org.apache.xml.security.stax.ext.XMLSecurityUtils; |
| import org.apache.xml.security.stax.ext.stax.XMLSecEvent; |
| import org.apache.xml.security.stax.impl.processor.input.XMLEventReaderInputProcessor; |
| import org.apache.xml.security.utils.UnsyncByteArrayInputStream; |
| import org.apache.xml.security.utils.UnsyncByteArrayOutputStream; |
| |
| import javax.xml.stream.*; |
| import java.io.*; |
| import java.util.Map; |
| |
| /** |
| */ |
| public class TransformIdentity implements Transformer { |
| |
| private static XMLOutputFactory xmlOutputFactory; |
| private static XMLInputFactory xmlInputFactory; |
| private OutputStream outputStream; |
| private XMLEventWriter xmlEventWriterForOutputStream; |
| private Transformer transformer; |
| private ChildOutputMethod childOutputMethod; |
| |
| protected static XMLOutputFactory getXmlOutputFactory() { |
| synchronized(TransformIdentity.class) { |
| if (xmlOutputFactory == null) { |
| xmlOutputFactory = XMLOutputFactory.newInstance(); |
| } |
| } |
| return xmlOutputFactory; |
| } |
| |
| public static XMLInputFactory getXmlInputFactory() { |
| synchronized(TransformIdentity.class) { |
| if (xmlInputFactory == null) { |
| xmlInputFactory = XMLInputFactory.newInstance(); |
| } |
| } |
| return xmlInputFactory; |
| } |
| |
| @Override |
| public void setOutputStream(OutputStream outputStream) throws XMLSecurityException { |
| this.outputStream = outputStream; |
| } |
| |
| protected OutputStream getOutputStream() { |
| return this.outputStream; |
| } |
| |
| protected XMLEventWriter getXmlEventWriterForOutputStream() throws XMLStreamException { |
| if (this.xmlEventWriterForOutputStream != null) { |
| return this.xmlEventWriterForOutputStream; |
| } |
| if (this.outputStream != null) { |
| return this.xmlEventWriterForOutputStream = getXmlOutputFactory().createXMLEventWriter(new FilterOutputStream(outputStream) { |
| @Override |
| public void close() throws IOException { |
| //do not close the parent output stream! |
| super.flush(); |
| } |
| }); |
| } |
| return null; |
| } |
| |
| @Override |
| public void setTransformer(Transformer transformer) throws XMLSecurityException { |
| this.transformer = transformer; |
| } |
| |
| protected Transformer getTransformer() { |
| return transformer; |
| } |
| |
| @Override |
| public void setProperties(Map<String, Object> properties) throws XMLSecurityException { |
| throw new UnsupportedOperationException("no properties supported"); |
| } |
| |
| @Override |
| public XMLSecurityConstants.TransformMethod getPreferredTransformMethod(XMLSecurityConstants.TransformMethod forInput) { |
| switch (forInput) { |
| case XMLSecEvent: |
| return XMLSecurityConstants.TransformMethod.XMLSecEvent; |
| case InputStream: |
| return XMLSecurityConstants.TransformMethod.InputStream; |
| default: |
| throw new IllegalArgumentException("Unsupported class " + forInput.name()); |
| } |
| } |
| |
| @Override |
| public void transform(XMLSecEvent xmlSecEvent) throws XMLStreamException { |
| if (getXmlEventWriterForOutputStream() != null) { |
| //we have an output stream |
| getXmlEventWriterForOutputStream().add(xmlSecEvent); |
| } else { |
| //we have a child transformer |
| if (childOutputMethod == null) { |
| |
| final XMLSecurityConstants.TransformMethod preferredChildTransformMethod = |
| getTransformer().getPreferredTransformMethod(XMLSecurityConstants.TransformMethod.XMLSecEvent); |
| |
| switch (preferredChildTransformMethod) { |
| case XMLSecEvent: { |
| childOutputMethod = new ChildOutputMethod() { |
| |
| @Override |
| public void transform(Object object) throws XMLStreamException { |
| getTransformer().transform((XMLSecEvent) object); |
| } |
| |
| @Override |
| public void doFinal() throws XMLStreamException { |
| getTransformer().doFinal(); |
| } |
| }; |
| break; |
| } |
| case InputStream: { |
| childOutputMethod = new ChildOutputMethod() { |
| |
| private UnsyncByteArrayOutputStream baos; |
| private XMLEventWriter xmlEventWriter; |
| |
| @Override |
| public void transform(Object object) throws XMLStreamException { |
| if (xmlEventWriter == null) { |
| baos = new UnsyncByteArrayOutputStream(); |
| xmlEventWriter = getXmlOutputFactory().createXMLEventWriter(baos); |
| } |
| |
| xmlEventWriter.add((XMLSecEvent) object); |
| } |
| |
| @Override |
| public void doFinal() throws XMLStreamException { |
| xmlEventWriter.close(); |
| try (InputStream is = new UnsyncByteArrayInputStream(baos.toByteArray())) { |
| getTransformer().transform(is); |
| getTransformer().doFinal(); |
| } catch (IOException ex) { |
| throw new XMLStreamException(ex); |
| } |
| } |
| }; |
| break; |
| } |
| } |
| } |
| if (childOutputMethod != null) { |
| childOutputMethod.transform(xmlSecEvent); |
| } |
| } |
| } |
| |
| @Override |
| public void transform(final InputStream inputStream) throws XMLStreamException { |
| if (getOutputStream() != null) { |
| //we have an output stream |
| try { |
| XMLSecurityUtils.copy(inputStream, getOutputStream()); |
| } catch (IOException e) { |
| throw new XMLStreamException(e); |
| } |
| } else { |
| //we have a child transformer |
| if (childOutputMethod == null) { |
| |
| final XMLSecurityConstants.TransformMethod preferredChildTransformMethod = |
| getTransformer().getPreferredTransformMethod(XMLSecurityConstants.TransformMethod.InputStream); |
| |
| switch (preferredChildTransformMethod) { |
| case XMLSecEvent: { |
| childOutputMethod = new ChildOutputMethod() { |
| |
| private XMLEventReaderInputProcessor xmlEventReaderInputProcessor; |
| |
| @Override |
| public void transform(Object object) throws XMLStreamException { |
| if (xmlEventReaderInputProcessor == null) { |
| xmlEventReaderInputProcessor = new XMLEventReaderInputProcessor( |
| null, |
| getXmlInputFactory().createXMLStreamReader(inputStream) |
| ); |
| } |
| try { |
| XMLSecEvent xmlSecEvent; |
| do { |
| xmlSecEvent = xmlEventReaderInputProcessor.processNextEvent(null); |
| getTransformer().transform(xmlSecEvent); |
| } while (xmlSecEvent.getEventType() != XMLStreamConstants.END_DOCUMENT); |
| } catch (XMLSecurityException e) { |
| throw new XMLStreamException(e); |
| } |
| } |
| |
| @Override |
| public void doFinal() throws XMLStreamException { |
| getTransformer().doFinal(); |
| } |
| }; |
| break; |
| } |
| case InputStream: { |
| childOutputMethod = new ChildOutputMethod() { |
| |
| @Override |
| public void transform(Object object) throws XMLStreamException { |
| getTransformer().transform(inputStream); |
| } |
| |
| @Override |
| public void doFinal() throws XMLStreamException { |
| getTransformer().doFinal(); |
| } |
| |
| }; |
| break; |
| } |
| } |
| } |
| if (childOutputMethod != null) { |
| childOutputMethod.transform(inputStream); |
| } |
| } |
| } |
| |
| @Override |
| public void doFinal() throws XMLStreamException { |
| if (xmlEventWriterForOutputStream != null) { |
| xmlEventWriterForOutputStream.close(); |
| } |
| if (childOutputMethod != null) { |
| childOutputMethod.doFinal(); |
| } else if (transformer != null) { |
| transformer.doFinal(); |
| } |
| } |
| |
| interface ChildOutputMethod { |
| |
| void transform(Object object) throws XMLStreamException; |
| |
| void doFinal() throws XMLStreamException; |
| } |
| } |