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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 org.apache.tuscany.samples.sdo.SdoSampleConstants;
import commonj.sdo.DataObject;
import commonj.sdo.helper.XMLHelper;
import commonj.sdo.helper.XSDHelper;
/**
* Demonstrats accessing a created DataObject's properties using xPath.
*
* This 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 snipets contained
* within, and is meant for use with, and reference to the <a
* href="http://download.boulder.ibm.com/ibmdl/pub/software/dw/specs/ws-sdo/SDO_Specification_Java_V2.01.pdf"
* target="_bank">SDO Specification</a>. <br>
* <br>
* It is worth noting that the Examples section of the specification, and the
* {@link org.apache.tuscany.samples.sdo.specExampleSection.AccessingDataObjectsUsingXPath}
* use unpure xpath expression. This sample attempts to demonstrate a more appropiate
* subset of xPath operations.<br>
* <br>
* <b>Usage:</b> <br>
* Include the following on your classpath :
* codegen-2.2.0-SNAPSHOT.jar,codegen-ecore-2.2.0-SNAPSHOT.jar,common-2.2.0-SNAPSHOT.jar,ecore-2.2.0-SNAPSHOT.jar,ecore-change-2.2.0-SNAPSHOT.jar,ecore-xmi-2.2.0-SNAPSHOT.jar,sdo-api-SNAPSHOT.jar,tuscany-sdo-impl-SNAPSHOT.jar,xsd-2.2.0-SNAPSHOT.jar,sdo-samples-standAlone-1.0-SNAPSHOT.jar
* <br>
* Execute: java
* org.apache.tuscany.samples.sdo.specCodeSnippets.AccessDataObjectUsingValidXPath
*
* @author Robbie Minshall
*/
public class AccessDataObjectUsingValidXPath {
/**
* Prints a subset of item properties to System.out where the individual item was
* accessed using an xPath expression
*
* @param purchaseOrder.
* DataObject defined by Types in
* {@link org.apache.tuscany.samples.sdo.SdoSampleConstants#PO_XSD_RESOURCE}
*/
public static void accessDataObjectUsingXPath(DataObject purchaseOrder) {
System.out.println("Accessing individual item from list using xpath");
// TODO: use variety of xpath expressions such as items/item[1]
// TODO: add to junit test cases for test cases above
DataObject item = purchaseOrder.getDataObject("items/item[1]");
System.out.println("Item toString : " + item.toString());
System.out.println("Item name:" + item.get("productName"));
System.out.println("Part num: " + item.get("partNum"));
}
/**
* Accesses and modifies properties of a purchase order DataObject using xPath(
* properties are defined in the xsd
* {@link org.apache.tuscany.samples.sdo.SdoSampleConstants#PO_XSD_RESOURCE} and
* populated by xml
* {@link org.apache.tuscany.samples.sdo.SdoSampleConstants#PO_XML_RESOURCE} )
*
* @param args.
* No parameters required.
*/
public static void main(String[] args) {
// information
System.out.println("***************************************");
System.out.println("SDO Sample AccessDataObjectUsingValidXPath");
System.out.println("***************************************");
System.out.println("Demonstrats accessing a created DataObject's properties using xPath.");
System.out.println("***************************************");
// create a DataObejct
DataObject purchaseOrder = null;
try {
XSDHelper.INSTANCE.define(ClassLoader.getSystemResourceAsStream(SdoSampleConstants.PO_XSD_RESOURCE), null);
purchaseOrder = XMLHelper.INSTANCE.load(ClassLoader.getSystemResourceAsStream(SdoSampleConstants.PO_XML_RESOURCE)).getRootObject();
System.out.println("DataObject created");
} catch (Exception e) {
System.out.println("Error creating DataObject " + e.toString());
e.printStackTrace();
return;
}
// start of sample
try {
accessDataObjectUsingXPath(purchaseOrder);
} catch (Exception e) {
System.out.println("Sorry there was an error accessing properties by name " + e.toString());
e.printStackTrace();
}
System.out.println("GoodBye");
// end of sample
}
}
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