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Diffstat (limited to 'sdo-java/tags/1.0-incubator-M3/sdo/sample/src/main/java/org/apache/tuscany/samples/sdo/specCodeSnippets/UsingXPath.java')
-rw-r--r-- | sdo-java/tags/1.0-incubator-M3/sdo/sample/src/main/java/org/apache/tuscany/samples/sdo/specCodeSnippets/UsingXPath.java | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/sdo-java/tags/1.0-incubator-M3/sdo/sample/src/main/java/org/apache/tuscany/samples/sdo/specCodeSnippets/UsingXPath.java b/sdo-java/tags/1.0-incubator-M3/sdo/sample/src/main/java/org/apache/tuscany/samples/sdo/specCodeSnippets/UsingXPath.java new file mode 100644 index 0000000000..9d23290cd2 --- /dev/null +++ b/sdo-java/tags/1.0-incubator-M3/sdo/sample/src/main/java/org/apache/tuscany/samples/sdo/specCodeSnippets/UsingXPath.java @@ -0,0 +1,140 @@ +/** + * + * 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; + +/** + * Demonstrates accessing a created DataObject's properties using SDO's XPath like syntax. + * + * 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 experiment with SDO. It is based upon code snippets contained within, and is meant for use with, and reference to the <a + * href="http://osoa.org/download/attachments/36/Java-SDO-Spec-v2.1.0-FINAL.pdf?version=1" target="_bank">SDO Specification</a> + * <P> + * <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 by downloading and unpacking a <a href="http://cwiki.apache.org/TUSCANY/sdo-downloads.html" target="_blank">Tuscany binary distribution </a> </LI> + * <LI>Execute: <br> + * java org.apache.tuscany.samples.sdo.specCodeSnippets.UsingXPath</LI> + * </UL> + */ +public class UsingXPath { + + /** + * 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) throws Exception { + // TODO: use variety of xpath expressions such as items/item[1] + // TODO: add to junit test cases for test cases above + + // xpath expressions for obtaining various items + String[] xPathExpressions = { "items/item[1]","items/item[productName=\"Baby Monitor\"]" }; + + for (int i = 0; i < xPathExpressions.length; i++) { + try { + System.out.println("Accessing individual item from list using xpath expression" + xPathExpressions[i]); + + DataObject item = purchaseOrder.getDataObject(xPathExpressions[i]); + System.out.println(" DataObject toString : " + item.toString()); + + System.out.println(" Item name:" + item.get("productName")); + System.out.println(" Part num: " + item.get("partNum")); + } catch (Exception e) { + System.out.println(" Sorry there was an error executing expression " + xPathExpressions[i]); + throw e; + } + } + + //TODO: select various lists of properties from DataObjects using xPath. + } + + /** + * 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 UsingXPath"); + 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 + } + +} |