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/**
*
* 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.samples.sdo.specCodeSnippets;
import java.io.InputStream;
import org.apache.tuscany.samples.sdo.SdoSampleConstants;
import commonj.sdo.DataObject;
import commonj.sdo.helper.XMLDocument;
import commonj.sdo.helper.XMLHelper;
import commonj.sdo.helper.XSDHelper;
/**
* Demonstrates defining Types by using a predefined xsd resource, and populating a DataObject by using a previously created xml file.
*
* The following sample is from the <a href="http://incubator.apache.org/tuscany"
* target="_blank"> Apache Tuscany</a> project. It was written to help users
* understand and experiement with SDO. It is based upon code snippets contained
* within, and is meant for use with, and reference to the <a
* href="http://www.osoa.org/download/attachments/791/SDO_Specification_Java_V2.01.pdf?version=1"
* target="_bank">SDO Specification</a>. <br>
* <br>
* <br>Uses {@link org.apache.tuscany.samples.sdo.SdoSampleConstants#PO_XSD_RESOURCE} and {@link org.apache.tuscany.samples.sdo.SdoSampleConstants#PO_XML_RESOURCE} in order to define purcahseOrder DataObjects
* <br><br>
* <b>Usage:</b> <br>
* This sample can easily be run from within Eclipse as a Java Application if tuscany or
* the sample-sdo project is imported into Eclipse as an existing project.
* <br><br>
* If executing as a standalone application please do the following:
* <br>
* <UL>
* <LI>Include the following jar files on your classpath :
* <UL>
* <LI>SDO API and Tuscany Implementation
* <UL>
* <LI>sdo-api-{version}.jar - SDO API
* <LI>tuscany-sdo-impl-{version}.jar - Tuscany SDO implementation
* </UL>
* </LI>
* <LI>EMF dependencies.
* <UL>
* <LI>emf-common-{version}.jar - some common framework utility and base classes
* <LI>emf-ecore-{version}.jar - the EMF core runtime implementation classes (the Ecore metamodel)
* <LI>emf-ecore-change-{version}.jar - the EMF change recorder and framework
* <LI>emf-ecore-xmi-{version}.jar - EMF's default XML (and XMI) serializer and loader
* <LI>xsd-{version}.jar - the XML Schema model
* </UL>
* </LI>
* </UL>
*
* These jar files can be obtained from directly from Tuscany and EMF projects or from <a
* href="http://wiki.apache.org/ws-data/attachments/Tuscany(2f)TuscanyJava(2f)SDO_Java_Overview/attachments/SDO%20Execution%20Dependencies"
* target="_bank">SDO Execution Dependancies </a> </LI>
* <LI>Execute: <br>
* java org.apache.tuscany.samples.sdo.specCodeSnippets.CreateDataObjectFromXsdAndXmlFiles</LI>
* </UL>
*
* @author Robbie Minshall
*/
public class CreateDataObjectFromXsdAndXmlFiles {
public static boolean typesDefined = false;
/**
* Loads the {@link org.apache.tuscany.samples.sdo.SdoSampleConstants#PO_XSD_RESOURCE} resource in order to define PurchaseOrder
* Types
*/
public static void definePurchaseOrderTypeUsingXsdResource()
throws Exception {
InputStream is = null;
try {
System.out.println("Attempting to define types using resource "
+ SdoSampleConstants.PO_XSD_RESOURCE);
is = ClassLoader.getSystemResourceAsStream(SdoSampleConstants.PO_XSD_RESOURCE);
if (is == null) {
System.out.println("InputStream is null, you may need to add the resources directory is on the classpath");
throw new Exception("InputStream for " + SdoSampleConstants.PO_XSD_RESOURCE + " was null, ensure that it is located on the classpath");
} else {
System.out.println("Obtained Input Stream from resoruce");
}
XSDHelper.INSTANCE.define(is, null);
} catch (Exception e) {
System.out
.println("Exception caught defining Types from resoruce stream to "
+ SdoSampleConstants.PO_XSD_RESOURCE);
throw e;
} finally {
// try to close the input stream
if (is != null) {
try {
is.close();
System.out.println("Closed input stream");
} catch (Exception e) {
System.out.println("could not close input stream " + e.toString());
}
}
}
}
/**
* Uses resource {@link org.apache.tuscany.samples.sdo.SdoSampleConstants#PO_XML_RESOURCE} to populate DataObject
* @return populated purchase order DataObject
*/
public static DataObject createPurchaseOrderDataObjectUsingXmlResource()
throws Exception {
if (! typesDefined){
definePurchaseOrderTypeUsingXsdResource();
}
DataObject purchaseOrder = null;
InputStream is = null;
try {
System.out
.println("Using resource as stream to access xml to populate DataObjects");
// FileInputStream fis = new FileInputStream(xmlFileName);
is = ClassLoader.getSystemResourceAsStream(SdoSampleConstants.PO_XML_RESOURCE);
if (is == null) {
System.out.println("InputStream is null");
} else {
System.out
.println("Successfully obtained InputStream from resource");
}
XMLDocument xmlDoc = XMLHelper.INSTANCE.load(is);
purchaseOrder = xmlDoc.getRootObject();
} catch (Exception e) {
System.out.println("Could not use resourceAsStream "
+ e.toString());
e.printStackTrace();
throw e;
}finally {
// try to close the input stream
if (is != null) {
try {
is.close();
System.out.println("Closed input stream");
} catch (Exception e) {
System.out.println("Could not close input stream " + e.toString());
}
}
}
return purchaseOrder;
}
/**
* @param args. No arguments required
*/
public static void main(String[] args) {
// information
System.out.println("***************************************");
System.out.println("SDO Sample CreateDataObjectFromXsdAndXmlFiles");
System.out.println("***************************************");
System.out.println("Demonstrates defining Types by using a predefined xsd resource, and populating a DataObject by using a previously created xml file");
System.out.println("***************************************");
try {
// define the types
definePurchaseOrderTypeUsingXsdResource();
// create a dataObject
DataObject purchaseOrder = createPurchaseOrderDataObjectUsingXmlResource();
System.out.println("DataObject sucessfully created");
} catch (Exception e) {
System.out.println("Sorry there was an error encountered " + e.toString());
}
System.out.println("GoodBye");
}
}
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