Examples of org.jbpm.pvm.internal.xml.Parser

org.jbpm.pvm.internal.xml.Parser
antiate the object for this binding MyProcess myProcess = new MyProcess(); // collect all the child elements of element List
elements = XmlUtil.elements(element); // push my processDefinition onto the object stack parse.pushObject(myProcess); try { for (Element activityElement: elements) { // parse the child elements with the bindings in category "activity" parseElement(activityElement, parse, "activity"); } } finally { // make sure my processDefinition is popped. parse.popObject(); } return myProcess; } }
Then, activity bindings might access the processDefinition like this:
```
public class MyNodeBinding implements Binding { public Object parse(Element element, Parse parse, Parser parser) { // instantiate the object for this binding MyNode myNode = new MyNode(); // add the activity to the processDefinition MyProcess myProcess = parse.findObject(MyProcess.class); myProcess.addNode(myNode); myNode.setMyProcess(myProcess); return myNode; } } 
```
A parser implementation will typically have a static Bindings object that is leveraged in all parser objects. To customize bindings for a such a parser be sure to make a deep copy with {@link Bindings#Bindings(Bindings)} beforeyou start adding more bindings to the specialized parser. Otherwise the base parser's bindings will be updated as well.

Building custom parsers

This parser is build for inheritance. Overriding method {@link #parseDocumentElement(Element,Parse)} can be an easy way to start writing your own logic on walking the Document Object Model (DOM). Such customizations can still be combined with the usage of bindings.

Entity resolving

A parser can be configured with a set of entities with the {@link #addEntity(String,Entity)} method. The {@link UrlEntity} hasa convenience method to build entities from resources {@link UrlEntity#UrlEntity(String,ClassLoader)}.

When a document builder is created, the default implementation of the {@link #setEntityResolver(DocumentBuilder)} will set this parser as the entity resolver.The implementation method of {@link EntityResolver} ({@link #resolveEntity(String,String)}will use the added {@link Entity}s to try and find a match based on the publicId. If one is found, the {@link Entity} inputSource is returned, otherwisethe systemId is used.

This class is intended to be used with aggregation as well as inheritence.
@author Tom Baeyens


    // method & args
    String methodName = XmlUtil.attribute(element, "method");
    subscribeOperation.setMethodName(methodName);
    List<Element> argElements = XmlUtil.elements(element, "arg");
    Parser wireParser = (Parser) parser;
    List<ArgDescriptor> argDescriptors = wireParser.parseArgs(argElements, parse);
    subscribeOperation.setArgDescriptors(argDescriptors);


   return subscribeOperation;
  }

View Full Code Here

  }


  public Object parse(Element element, Parse parse, Parser parser) {
    ObjectDescriptor descriptor = new ObjectDescriptor();


    Parser wireParser = (Parser) parser;
    String className = XmlUtil.attribute(element, "class");
    String expr = XmlUtil.attribute(element, "expr");
    String factoryObjectName = XmlUtil.attribute(element, "factory");
    Element factoryElement = XmlUtil.element(element, "factory");


    if (className!=null) {
      descriptor.setClassName(className);
      if (factoryObjectName!=null) {
        parse.addProblem("attribute 'factory' is specified together with attribute 'class' in element 'object': "+XmlUtil.toString(element), element);
      }
      if (factoryElement!=null) {
        parse.addProblem("element 'factory' is specified together with attribute 'class' in element 'object': "+XmlUtil.toString(element), element);
      }


      Element constructorElement = XmlUtil.element(element, "constructor");
      if (constructorElement!=null) {
        List<Element> argElements = XmlUtil.elements(constructorElement, "arg");
        List<ArgDescriptor> argDescriptors = wireParser.parseArgs(argElements, parse);
        descriptor.setArgDescriptors(argDescriptors);


        if (element.hasAttribute("method")) {
          parse.addProblem("attributes 'class' and 'method' indicate static method and also a 'constructor' element is specified for element 'object': "+XmlUtil.toString(element), element);
        }
      }


    } else if (factoryObjectName!=null) {
      descriptor.setFactoryObjectName(factoryObjectName);
      if (factoryElement!=null) {
        parse.addProblem("element 'factory' is specified together with attribute 'factory' in element 'object': "+XmlUtil.toString(element), element);
      }


    } else if (factoryElement!=null) {
      Element factoryDescriptorElement = XmlUtil.element(factoryElement);
      Descriptor factoryDescriptor = (Descriptor) parser.parseElement(factoryDescriptorElement, parse, WireParser.CATEGORY_DESCRIPTOR);
      descriptor.setFactoryDescriptor(factoryDescriptor);


    } else if (expr!=null) {
      descriptor.setExpr(expr);
      String lang = XmlUtil.attribute(element, "lang");
      descriptor.setLang(lang);
      
    } else {
      parse.addProblem("element 'object' must have one of {attribute 'class', attribute 'expr', attribute 'factory' or element 'factory'}: "+XmlUtil.toString(element), element);
    }


    // method
    if (element.hasAttribute("method")) {
      descriptor.setMethodName(element.getAttribute("method"));


      List<Element> argElements = XmlUtil.elements(element, "arg");
      List<ArgDescriptor> argDescriptors = wireParser.parseArgs(argElements, parse);
      descriptor.setArgDescriptors(argDescriptors);
    } else if ( (factoryObjectName!=null)
                || (factoryElement!=null)
              ) {
      parse.addProblem("element 'object' with a element 'factory' or a attribute 'factory' must have a attribute 'method': "+XmlUtil.toString(element), element);

View Full Code Here

      invokeOperation.setMethodName(element.getAttribute("method"));
    } else {
      parse.addProblem("invoke must have method : "+XmlUtil.toString(element), element);
    }
    List<Element> argElements = XmlUtil.elements(element, "arg");
    Parser wireParser = (Parser) parser;
    List<ArgDescriptor> argDescriptors = wireParser.parseArgs(argElements, parse);
    invokeOperation.setArgDescriptors(argDescriptors);
    return invokeOperation;
  }

View Full Code Here

  }


  public Object parse(Element element, Parse parse, Parser parser) {
    ObjectDescriptor descriptor = new ObjectDescriptor();


    Parser wireParser = (Parser) parser;
    String className = XmlUtil.attribute(element, "class");
    String expr = XmlUtil.attribute(element, "expr");
    String factoryObjectName = XmlUtil.attribute(element, "factory");
    Element factoryElement = XmlUtil.element(element, "factory");


    if (className!=null) {
      descriptor.setClassName(className);
      if (factoryObjectName!=null) {
        parse.addProblem("attribute 'factory' is specified together with attribute 'class' in element 'object': "+XmlUtil.toString(element), element);
      }
      if (factoryElement!=null) {
        parse.addProblem("element 'factory' is specified together with attribute 'class' in element 'object': "+XmlUtil.toString(element), element);
      }


      Element constructorElement = XmlUtil.element(element, "constructor");
      if (constructorElement!=null) {
        List<Element> argElements = XmlUtil.elements(constructorElement, "arg");
        List<ArgDescriptor> argDescriptors = wireParser.parseArgs(argElements, parse);
        descriptor.setArgDescriptors(argDescriptors);


        if (element.hasAttribute("method")) {
          parse.addProblem("attributes 'class' and 'method' indicate static method and also a 'constructor' element is specified for element 'object': "+XmlUtil.toString(element), element);
        }
      }


    } else if (factoryObjectName!=null) {
      descriptor.setFactoryObjectName(factoryObjectName);
      if (factoryElement!=null) {
        parse.addProblem("element 'factory' is specified together with attribute 'factory' in element 'object': "+XmlUtil.toString(element), element);
      }


    } else if (factoryElement!=null) {
      Element factoryDescriptorElement = XmlUtil.element(factoryElement);
      Descriptor factoryDescriptor = (Descriptor) parser.parseElement(factoryDescriptorElement, parse, WireParser.CATEGORY_DESCRIPTOR);
      descriptor.setFactoryDescriptor(factoryDescriptor);


    } else if (expr!=null) {
      descriptor.setExpr(expr);
      String lang = XmlUtil.attribute(element, "lang");
      descriptor.setLang(lang);
      
    } else {
      parse.addProblem("element 'object' must have one of {attribute 'class', attribute 'expr', attribute 'factory' or element 'factory'}: "+XmlUtil.toString(element), element);
    }


    // method
    if (element.hasAttribute("method")) {
      descriptor.setMethodName(element.getAttribute("method"));


      List<Element> argElements = XmlUtil.elements(element, "arg");
      List<ArgDescriptor> argDescriptors = wireParser.parseArgs(argElements, parse);
      descriptor.setArgDescriptors(argDescriptors);
    } else if ( (factoryObjectName!=null)
                || (factoryElement!=null)
              ) {
      parse.addProblem("element 'object' with a element 'factory' or a attribute 'factory' must have a attribute 'method': "+XmlUtil.toString(element), element);

View Full Code Here

TOP

Related Classes of org.jbpm.pvm.internal.xml.Parser

org.jbpm.pvm.internal.wire.binding.InvokeBinding

org.jbpm.pvm.internal.wire.binding.ObjectBinding

org.jbpm.pvm.internal.wire.binding.SubscribeBinding

org.jbpm.pvm.internal.wire.Descriptor

org.jbpm.pvm.internal.wire.descriptor.ArgDescriptor

org.xml.sax.InputSource

org.xml.sax.XMLReader

javax.xml.parsers.SAXParser

javax.xml.parsers.DocumentBuilder

java.net.URL

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.

Examples of org.jbpm.pvm.internal.xml.Parser

Building custom parsers

Entity resolving

Related Classes of org.jbpm.pvm.internal.xml.Parser