diff options
author | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2009-11-10 19:20:12 +0000 |
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committer | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2009-11-10 19:20:12 +0000 |
commit | 195774c489a1a671aca514b0afa88332bf9c6ee3 (patch) | |
tree | a22cb1f3f70f0c13a9a7049075205072901459aa /sdo-java/tags/1.1.1-RC2/lib/src/main/java/org/apache/tuscany/sdo/spi/HelperProviderBase.java | |
parent | c54bda13cb403d10675a6244bd00b8b536111ad6 (diff) |
Moving SDO tags
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@834617 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'sdo-java/tags/1.1.1-RC2/lib/src/main/java/org/apache/tuscany/sdo/spi/HelperProviderBase.java')
-rw-r--r-- | sdo-java/tags/1.1.1-RC2/lib/src/main/java/org/apache/tuscany/sdo/spi/HelperProviderBase.java | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/sdo-java/tags/1.1.1-RC2/lib/src/main/java/org/apache/tuscany/sdo/spi/HelperProviderBase.java b/sdo-java/tags/1.1.1-RC2/lib/src/main/java/org/apache/tuscany/sdo/spi/HelperProviderBase.java new file mode 100644 index 0000000000..375552497b --- /dev/null +++ b/sdo-java/tags/1.1.1-RC2/lib/src/main/java/org/apache/tuscany/sdo/spi/HelperProviderBase.java @@ -0,0 +1,246 @@ +/** + * + * 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.sdo.spi; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.NotSerializableException; +import java.io.ObjectInput; +import java.io.ObjectOutput; +import java.io.ObjectStreamException; +import java.util.zip.GZIPInputStream; +import java.util.zip.GZIPOutputStream; + +import org.apache.tuscany.sdo.api.SDOHelper; +import org.apache.tuscany.sdo.api.SDOUtil; +import org.apache.tuscany.sdo.api.XMLStreamHelper; +import org.apache.tuscany.sdo.lib.SDOObjectInputStream; +import org.apache.tuscany.sdo.lib.SDOObjectOutputStream; + +import commonj.sdo.DataGraph; +import commonj.sdo.DataObject; +import commonj.sdo.helper.CopyHelper; +import commonj.sdo.helper.DataFactory; +import commonj.sdo.helper.DataHelper; +import commonj.sdo.helper.EqualityHelper; +import commonj.sdo.helper.HelperContext; +import commonj.sdo.helper.TypeHelper; +import commonj.sdo.helper.XMLDocument; +import commonj.sdo.helper.XMLHelper; +import commonj.sdo.helper.XSDHelper; +import commonj.sdo.impl.HelperProvider; +import commonj.sdo.impl.ExternalizableDelegator.Resolvable; + + +/** + * Create and manage all the default helpers + */ +public abstract class HelperProviderBase extends HelperProvider +{ + protected CopyHelper copyHelper; + + protected DataFactory dataFactory; + + protected DataHelper dataHelper; + + protected EqualityHelper equalityHelper; + + protected TypeHelper typeHelper; + + protected XMLHelper xmlHelper; + + protected XSDHelper xsdHelper; + + protected SDOHelper sdoHelper; // Tuscany extension APIs + + protected XMLStreamHelper xmlStreamHelper; + /** + * Subclasses must implement this method to initialize the above Helper instance variables + */ + protected abstract HelperContext createDefaultHelpers(); + + public HelperProviderBase() + { + defaultContext = createDefaultHelpers(); + } + + public SDOHelper sdoHelper() + { + return sdoHelper; + } + + public CopyHelper copyHelper() + { + return copyHelper; + } + + public DataFactory dataFactory() + { + return dataFactory; + } + + public DataHelper dataHelper() + { + return dataHelper; + } + + public EqualityHelper equalityHelper() + { + return equalityHelper; + } + + public TypeHelper typeHelper() + { + return typeHelper; + } + + public XMLHelper xmlHelper() + { + return xmlHelper; + } + + public XMLStreamHelper xmlStreamHelper() + { + return xmlStreamHelper; + } + public XSDHelper xsdHelper() + { + return xsdHelper; + } + + public Resolvable resolvable() + { + return new ResolvableImpl(); + } + + public Resolvable resolvable(Object target) + { + return new ResolvableImpl(target); + } + + protected class ResolvableImpl implements Resolvable + { + protected Object target; + + public ResolvableImpl(Object target) { this.target = target; } + + public ResolvableImpl() { this.target = null; } + + public void writeExternal(ObjectOutput out) throws IOException + { + if (target instanceof DataObject) + { + writeDataObject((DataObject)target, out); + } + else + { + throw new NotSerializableException(); // should never happen + } + } + + public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException + { + target = readDataObject(in); + } + + public Object readResolve() throws ObjectStreamException + { + return target; + } + + protected void writeDataObject(DataObject dataObject, ObjectOutput objectOutput) throws IOException + { + DataGraph dataGraph = dataObject.getDataGraph(); + if (dataGraph != null) + { + objectOutput.writeByte(0); + objectOutput.writeUTF(SDOUtil.getXPath(dataObject)); + objectOutput.writeObject(dataGraph); + } + else if (dataObject.getContainer() != null) + { + objectOutput.writeByte(0); + objectOutput.writeUTF(SDOUtil.getXPath(dataObject)); + objectOutput.writeObject(dataObject.getRootObject()); + } + else + { + // Root object + objectOutput.writeByte(1); + + ByteArrayOutputStream compressedByteArrayOutputStream = new ByteArrayOutputStream(); + GZIPOutputStream gzipOutputStream = new GZIPOutputStream(compressedByteArrayOutputStream); + XMLHelper xmlHelperLocal = xmlHelper; + if(objectOutput instanceof SDOObjectOutputStream) + { + xmlHelperLocal = ((SDOObjectOutputStream)objectOutput).getHelperContext().getXMLHelper(); + } + xmlHelperLocal.save(dataObject, "commonj.sdo", "dataObject", gzipOutputStream); + gzipOutputStream.close(); // Flush the contents + + byte[] byteArray = compressedByteArrayOutputStream.toByteArray(); + objectOutput.writeInt(byteArray.length); + objectOutput.write(byteArray); + } + } + + protected DataObject readDataObject(ObjectInput objectInput) throws IOException, ClassNotFoundException + { + boolean isRoot = objectInput.readByte() == 1; + if (isRoot) + { + // Root object: [rootXML] = length + XML contents + int length = objectInput.readInt(); + byte[] compressedBytes = new byte [length]; + + int index = 0; + int bytesRead; + while (index < length) { + if ((bytesRead = objectInput.read(compressedBytes, index, length-index)) == -1) { + break; + } + index += bytesRead; + } + + GZIPInputStream gzipInputStream = new GZIPInputStream(new ByteArrayInputStream(compressedBytes)); + XMLHelper xmlHelperLocal = xmlHelper; + if (objectInput instanceof SDOObjectInputStream) + { + xmlHelperLocal = ((SDOObjectInputStream)objectInput).getHelperContext().getXMLHelper(); + } + XMLDocument doc = xmlHelperLocal.load(gzipInputStream); + gzipInputStream.close(); + + return doc.getRootObject(); + } + else + { + // Non root object: [path] [root] + String xpath = objectInput.readUTF(); + Object object = objectInput.readObject(); + + DataObject root = object instanceof DataGraph ? ((DataGraph)object).getRootObject() : (DataObject)object; + return xpath.equals("") ? root : root.getDataObject(xpath); + } + } + } + +} |