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Diffstat (limited to 'branches/sca-java-0.99/modules/databinding-saxon/src/main/java/org/apache/tuscany/sca/databinding/saxon/DataObject2NodeInfoTransformer.java')
-rw-r--r-- | branches/sca-java-0.99/modules/databinding-saxon/src/main/java/org/apache/tuscany/sca/databinding/saxon/DataObject2NodeInfoTransformer.java | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/branches/sca-java-0.99/modules/databinding-saxon/src/main/java/org/apache/tuscany/sca/databinding/saxon/DataObject2NodeInfoTransformer.java b/branches/sca-java-0.99/modules/databinding-saxon/src/main/java/org/apache/tuscany/sca/databinding/saxon/DataObject2NodeInfoTransformer.java new file mode 100644 index 0000000000..06f07790f5 --- /dev/null +++ b/branches/sca-java-0.99/modules/databinding-saxon/src/main/java/org/apache/tuscany/sca/databinding/saxon/DataObject2NodeInfoTransformer.java @@ -0,0 +1,119 @@ +/* + * 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.tuscany.sca.databinding.saxon; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.IOException; + +import javax.xml.transform.Source; +import javax.xml.transform.Transformer; +import javax.xml.transform.TransformerConfigurationException; +import javax.xml.transform.TransformerException; +import javax.xml.transform.TransformerFactory; +import javax.xml.transform.TransformerFactoryConfigurationError; +import javax.xml.transform.dom.DOMResult; +import javax.xml.transform.stream.StreamSource; + +import net.sf.saxon.om.NodeInfo; + +import org.apache.tuscany.sca.databinding.PullTransformer; +import org.apache.tuscany.sca.databinding.TransformationContext; +import org.apache.tuscany.sca.databinding.TransformationException; +import org.apache.tuscany.sca.databinding.impl.BaseTransformer; + +import commonj.sdo.DataObject; +import commonj.sdo.helper.XMLHelper; +import commonj.sdo.impl.HelperProvider; + +/** + * Transforms SDO DataObject-s to NodeInfo objects needed by Saxon parser + * @version $Rev$ $Date$ + * For root element when serializing the DataObject the name of its + * implemented interface is used with its first letter made lowercase. + * Also any namespaces that are defined are deleted, because otherwise + * the SaxonB parser does not work + */ +public class DataObject2NodeInfoTransformer extends + BaseTransformer<DataObject, NodeInfo> implements + PullTransformer<DataObject, NodeInfo> { + + private Node2NodeInfoTransformer node2NodeInfoTransformer; + + public DataObject2NodeInfoTransformer(Node2NodeInfoTransformer node2NodeInfoTransformer) { + this.node2NodeInfoTransformer = node2NodeInfoTransformer; + } + + public NodeInfo transform(DataObject source, TransformationContext context) { + XMLHelper helper = HelperProvider.INSTANCE.xmlHelper(); + String name = null; + if(source.getClass().getInterfaces().length > 0) { + name = source.getClass().getInterfaces()[0].getSimpleName(); + } else { + name = source.getClass().getName(); + } + + if(name.length() > 0) { + name = Character.toLowerCase(name.charAt(0)) + name.substring(1, name.length()); + } + + DOMResult domResult = new DOMResult(); + + ByteArrayOutputStream baos = new ByteArrayOutputStream(); + try { + helper.save(source, null, name, baos); + baos.flush(); + baos.close(); + } catch (IOException e) { + throw new TransformationException(e); + } + + ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray()); + Source src = new StreamSource(bais); + + try { + Transformer transformer = TransformerFactory.newInstance().newTransformer(); + transformer.transform(src, domResult); + } catch (TransformerConfigurationException e) { + throw new TransformationException(e); + } catch (TransformerFactoryConfigurationError e) { + throw new TransformationException(e); + } catch (TransformerException e) { + throw new TransformationException(e); + } + + return node2NodeInfoTransformer.transform(domResult.getNode(), context); + } + + @Override + protected Class getSourceType() { + return DataObject.class; + } + + @Override + protected Class getTargetType() { + return NodeInfo.class; + } + + @Override + public int getWeight() { + return 10; + } + +} |