Examples of org.exolab.javasource.JMethod

org.exolab.javasource.JMethod
A class which holds information about the methods of a JClass. Modelled closely after the Java Reflection API. This class is part of package which is used to create source code. @author Keith Visco @version $Revision: 7331 $ $Date: 2004-12-03 11:57:33 -0700 (Fri, 03 Dec 2004) $

     * @param parent the JClass to create the #marshal methods for
     * @param isAbstract true if the generated Class should be marked abstract
     */
    private void createMarshalMethods(final JClass parent, final boolean isAbstract) {
        //-- create main marshal method
        JMethod jMethod = new JMethod("marshal");
        jMethod.addException(SGTypes.MARSHAL_EXCEPTION,
                "if object is null or if any SAXException is thrown during marshaling");
        jMethod.addException(SGTypes.VALIDATION_EXCEPTION,
                "if this object is an invalid instance according to the schema");
        jMethod.addParameter(new JParameter(SGTypes.WRITER, "out"));


        //if (_config.useJava50()) {
        // jMethod.addAnnotation(new JAnnotation(new JAnnotationType("Override")));
        //}


        parent.addMethod(jMethod);


        if (isAbstract) {
            jMethod.getModifiers().setAbstract(true);
        } else {
            JSourceCode jsc = jMethod.getSourceCode();
            jsc.add("org.exolab.castor.xml.Marshaller.marshal(this, out);");
        }


        //-- create helper marshal method
        //-- start helper marshal method, this method will
        //-- be built up as we process the given ElementDecl
        jMethod = new JMethod("marshal");
        JClass jc = null;
        if (_sax1) {
            jc = new JClass("org.xml.sax.DocumentHandler");
        } else {
            jc = new JClass("org.xml.sax.ContentHandler");
            jMethod.addException(SGTypes.IO_EXCEPTION,
                    "if an IOException occurs during marshaling");
        }
        jMethod.addException(SGTypes.MARSHAL_EXCEPTION,
                "if object is null or if any SAXException is thrown during marshaling");
        jMethod.addException(SGTypes.VALIDATION_EXCEPTION,
                "if this object is an invalid instance according to the schema");
        jMethod.addParameter(new JParameter(jc, "handler"));
        parent.addMethod(jMethod);


        if (isAbstract) {
            jMethod.getModifiers().setAbstract(true);
        } else {
            JSourceCode jsc = jMethod.getSourceCode();
            jsc.add("org.exolab.castor.xml.Marshaller.marshal(this, handler);");
        }
    } //-- createMarshalMethods

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            returnType = findBaseClass(parent, sgState);
        } else {
            returnType = parent;
        }


        JMethod jMethod = new JMethod(methodName, returnType,
                                      "the unmarshaled " + returnType);
        jMethod.getModifiers().setStatic(true);
        jMethod.addException(SGTypes.MARSHAL_EXCEPTION,
                "if object is null or if any SAXException is thrown during marshaling");
        jMethod.addException(SGTypes.VALIDATION_EXCEPTION,
                "if this object is an invalid instance according to the schema");
        jMethod.addParameter(new JParameter(SGTypes.READER, "reader"));
        parent.addMethod(jMethod);


        JSourceCode jsc = jMethod.getSourceCode();
        jsc.add("return (");
        jsc.append(returnType.getName());
        jsc.append(") org.exolab.castor.xml.Unmarshaller.unmarshal(");
        jsc.append(parent.getName());
        jsc.append(".class, reader);");

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        // The argument is not null
        JField[] fields = jclass.getFields();


        // Creates the method signature
        JMethod jMethod = new JMethod("hashCode", JType.INT, "a hash code value for the object.");
        jMethod.setComment("Overrides the java.lang.Object.hashCode method.\n"
                           + "<p>\n"
                           + "The following steps came from "
                           + "<b>Effective Java Programming Language Guide</b> "
                           + "by Joshua Bloch, Chapter 3");


        // The hashCode method has no arguments
        jclass.addMethod(jMethod);


        JSourceCode jsc = jMethod.getSourceCode();
        if (jclass.getSuperClassQualifiedName() == null) {
            jsc.add("int result = 17;");
        } else {
            jsc.add("int result = super.hashCode();");
        }

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         if (jclass == null) {
            throw new IllegalArgumentException("JClass must not be null");
         }


        JField[] fields = jclass.getFields();
        JMethod jMethod = new JMethod("equals", JType.BOOLEAN, "true if the objects are equal.");
        jMethod.setComment("Overrides the java.lang.Object.equals method.");
        jMethod.addParameter(new JParameter(SGTypes.OBJECT, "obj"));


        if (getConfig().useJava50()) {
            jMethod.addAnnotation(new JAnnotation(new JAnnotationType("Override")));
        }


        jclass.addMethod(jMethod);
        JSourceCode jsc = jMethod.getSourceCode();
        jsc.add("if ( this == obj )");
        jsc.indent();
        jsc.add("return true;");
        jsc.unindent();
        if (jclass.getSuperClassQualifiedName() != null) {

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      *
      * @param jclass The JClass which will implement the CastorTestable Interface.
      * @param state
      */
    private void createRandomizeFields(final JClass jclass, final FactoryState state) {
        JMethod jMethod = new JMethod("randomizeFields");
        jMethod.addException(new JClass("InstantiationException"),
                             "if we try to instantiate an abstract class or interface");
        jMethod.addException(new JClass("IllegalAccessException"),
                             "if we do not have access to the field, for example if it is private");
        jMethod.setComment("implementation of org.castor.xmlctf.CastorTestable");
        jclass.addMethod(jMethod);
        JSourceCode jsc = jMethod.getSourceCode();
        JField[] fields = jclass.getFields();


        for (int i = 0; i < fields.length; i++) {
            JField temp = fields[i];
            JType type = temp.getType();
            String name = temp.getName();


            if (state.getFieldInfoForChoice() != null
                    && name.equals(state.getFieldInfoForChoice().getName())) {
                continue;
            }


            if (name.startsWith("_")) {
                name = getJavaNaming().toJavaClassName(name.substring(1));
            } else {
                name = getJavaNaming().toJavaClassName(name);
            }


            String setName = "set" + name;
            if (name.indexOf("Has") == -1) {
                if (type instanceof JCollectionType) {
                    //Collection needs a specific handling
                    int listLocat = name.lastIndexOf("List");
                    String tempName = name;
                    if (listLocat != -1) {
                       tempName = tempName.substring(0, listLocat);
                    }
                    String methodName = getJavaNaming().toJavaClassName(tempName);
                    methodName = "get" + methodName;
                    JMethod method = jclass.getMethod(methodName, 0);
                    // TODO handle the Item introduced in with the group handling
                    if (method == null) {
                        continue;
                    }


                    String componentName = method.getReturnType().getName();


                    jsc.add(temp.getName());
                    jsc.append(" = RandomHelper.getRandom(");
                    jsc.append(temp.getName());
                    jsc.append(", ");

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     * org.castor.xmlctf.CastorTestable.
     *
     * @param jclass The JClass which will implement the CastorTestable Interface.
     */
    private void createDumpFields(final JClass jclass) {
        JMethod jMethod = new JMethod("dumpFields", SGTypes.STRING,
                "a String representation of all of the fields for " + jclass.getName());
        jMethod.setComment("implementation of org.castor.xmlctf.CastorTestable");
        jclass.addMethod(jMethod);
        JSourceCode jsc = jMethod.getSourceCode();
        jsc.add("StringBuffer result = new StringBuffer(\"DumpFields() for element: ");
        jsc.append(jclass.getName());
        jsc.append("\\n\");");


        JField[] fields = jclass.getFields();

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    /**
     * Creates the Validate methods for the given JClass.
     * @param jClass the JClass to create the Validate methods for
     */
    private void createValidateMethods(final JClass jClass) {
        JMethod     jMethod = null;
        JSourceCode jsc     = null;


        //-- #validate
        jMethod = new JMethod("validate");
        jMethod.addException(SGTypes.VALIDATION_EXCEPTION,
                             "if this object is an invalid instance according to the schema");


        jClass.addMethod(jMethod);
        jsc = jMethod.getSourceCode();
        jsc.add("org.exolab.castor.xml.Validator validator = new ");
        jsc.append("org.exolab.castor.xml.Validator();");
        jsc.add("validator.validate(this);");


        //-- #isValid
        jMethod  = new JMethod("isValid", JType.BOOLEAN,
                               "true if this object is valid according to the schema");
        jsc = jMethod.getSourceCode();
        jsc.add("try {");
        jsc.indent();
        jsc.add("validate();");
        jsc.unindent();
        jsc.add("} catch (org.exolab.castor.xml.ValidationException vex) {");

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                        handleField(fieldInfo, state, component);


                        //-- remove getter since we don't need to override the original getter
                        String mname = fieldInfo.getReadMethodName();
                        JClass jClass = state.getJClass();
                        JMethod method = jClass.getMethod(mname, 0);
                        jClass.removeMethod(method);


                        //-- update setter method
                        mname = fieldInfo.getWriteMethodName();
                        method = jClass.getMethod(mname, 0);
                        JSourceCode jsc = method.getSourceCode();
                        jsc.add("super.");
                        jsc.append(mname);
                        jsc.append("(this.");
                        jsc.append(fieldInfo.getName());
                        jsc.append(".toString());");

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        //---------------------------------/
        //- notifyPropertyChangeListeners -/
        //---------------------------------/


        JMethod jMethod = new JMethod(null,"notifyPropertyChangeListeners");
        jMethod.getModifiers().makeProtected();


        String desc = "Notifies all registered "+
            "PropertyChangeListeners when a bound property's value "+
            "changes.";


        JDocComment jdc = jMethod.getJDocComment();
        JDocDescriptor jdDesc = null;


        jdc.appendComment(desc);


        jMethod.addParameter(new JParameter(SGTypes.String, "fieldName"));
        jdDesc = jdc.getParamDescriptor("fieldName");
        jdDesc.setDescription("the name of the property that has changed.");


        jMethod.addParameter(new JParameter(SGTypes.Object, "oldValue"));
        jdDesc = jdc.getParamDescriptor("oldValue");
        jdDesc.setDescription("the old value of the property.");


        jMethod.addParameter(new JParameter(SGTypes.Object, "newValue"));
        jdDesc = jdc.getParamDescriptor("newValue");
        jdDesc.setDescription("the new value of the property.");


        parent.addMethod(jMethod);
        jsc = jMethod.getSourceCode();
        //--fix for bug 1026
        jsc.add("if (");
        jsc.append(vName);
        jsc.append(" == null) return;");
        
        jsc.add("java.beans.PropertyChangeEvent event = new ");
        jsc.append("java.beans.PropertyChangeEvent");
        jsc.append("(this, fieldName, oldValue, newValue);");
        jsc.add("");
        jsc.add("for (int i = 0; i < ");
        jsc.append(vName);
        jsc.append(".size(); i++) {");
        jsc.indent();
        jsc.add("((java.beans.PropertyChangeListener) ");
        jsc.append(vName);
        jsc.append(".elementAt(i)).");
        jsc.append("propertyChange(event);");
        jsc.unindent();
        jsc.add("}");


        //-----------------------------/
        //- addPropertyChangeListener -/
        //-----------------------------/


        JType jType = new JClass("java.beans.PropertyChangeListener");
        jMethod = new JMethod(null,"addPropertyChangeListener");


        desc = "Registers a PropertyChangeListener with this class.";


        jdc = jMethod.getJDocComment();
        jdc.appendComment(desc);


        jMethod.addParameter(new JParameter(jType, "pcl"));
        desc = "The PropertyChangeListener to register.";
        jdDesc = jdc.getParamDescriptor("pcl");
        jdDesc.setDescription(desc);


        parent.addMethod(jMethod);


        jsc = jMethod.getSourceCode();
        jsc.add(vName);
        jsc.append(".addElement(pcl);");


        //--------------------------------/
        //- removePropertyChangeListener -/
        //--------------------------------/


        jMethod = new JMethod(JType.Boolean,"removePropertyChangeListener");


        desc = "Removes the given PropertyChangeListener "+
            "from this classes list of ProperyChangeListeners.";


        jdc = jMethod.getJDocComment();
        jdc.appendComment(desc);


        jMethod.addParameter(new JParameter(jType, "pcl"));
        desc = "The PropertyChangeListener to remove.";
        jdDesc = jdc.getParamDescriptor("pcl");
        jdDesc.setDescription(desc);


        desc = "true if the given PropertyChangeListener was removed.";
        jdc.addDescriptor(JDocDescriptor.createReturnDesc(desc));


        parent.addMethod(jMethod);


        jsc = jMethod.getSourceCode();
        jsc.add("return ");
        jsc.append(vName);
        jsc.append(".removeElement(pcl);");


    } //-- createPropertyChangeMethods

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     * @param parent the JClass to create the #marshal methods for
    **/
    private void createMarshalMethods(JClass parent, boolean isAbstract) {


        //-- create main marshal method
        JMethod jMethod = new JMethod(null,"marshal");
        jMethod.addException(SGTypes.MarshalException);
        jMethod.addException(SGTypes.ValidationException);
        jMethod.addParameter(new JParameter(SGTypes.Writer, "out"));
        parent.addMethod(jMethod);


        if (isAbstract) {
            jMethod.getModifiers().setAbstract(true);
        }
        else {
            JSourceCode jsc = jMethod.getSourceCode();
            jsc.add("");
            jsc.add("Marshaller.marshal(this, out);");
        }




        //-- create helper marshal method
        //-- start helper marshal method, this method will
        //-- be built up as we process the given ElementDecl
        jMethod = new JMethod(null, "marshal");
        JClass jc = null;
        if (_sax1) {
            jc = new JClass("org.xml.sax.DocumentHandler");
        } else {
            jc = new JClass("org.xml.sax.ContentHandler");
            jMethod.addException(SGTypes.IOException);
        }
        jMethod.addException(SGTypes.MarshalException);
        jMethod.addException(SGTypes.ValidationException);
        jMethod.addParameter(new JParameter(jc, "handler"));
        parent.addMethod(jMethod);


        if (isAbstract) {
            jMethod.getModifiers().setAbstract(true);
        }
        else {
            JSourceCode jsc = jMethod.getSourceCode();
            jsc = jMethod.getSourceCode();
            jsc.add("");
            jsc.add("Marshaller.marshal(this, handler);");
        }


    } //-- createMarshalMethods

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