xmlmapper.java

低版本的tomcat 对于有些老版本的应用还真的需要老版的中间件

    // -------------------- Factories for "common" actions --------------------
    // XXX Probably it's better to use the real XmlActions, with new FooAction()

    /** Create an object using for a matching tag with the given class name
     */
    public XmlAction objectCreate( String classN ) {
	return new ObjectCreate( classN);
    }

    /** Create an object using an attribute value as the class name
	If no attribute use classN as a default.
     */
    public XmlAction objectCreate( String classN, String attrib ) {
	return new ObjectCreate( classN, attrib);
    }

    /** Set object properties using XML attributes
     */
    public XmlAction setProperties(  ) {
	return new SetProperties();
    }

    /** For the last 2 objects in stack, create a parent-child
     *	and child.childM with parente as parameter
     */
    public XmlAction setParent( String childM ) {
	return new SetParent( childM );
    }

    /** For the last 2 objects in stack, create a parent-child
     * and child.childM with parent as parameter
     */
    public XmlAction setParent( String childM, String argType ) {
	return new SetParent( childM, argType );
    }

    /** For the last 2 objects in stack, create a parent-child
     *  relation by invokeing parent.parentM with the child as parameter
     *  ArgType is the parameter expected by addParent ( null use the current object
     *  type)
     */
    public XmlAction addChild( String parentM, String argType ) {
	return new AddChild( parentM, argType );
    }

    /** If a tag matches, invoke a method on the current object.
	Parameters can be extracted from sub-elements of the current
	tag.
    */
    public XmlAction methodSetter(String method, int paramC) {
	return new MethodSetter(method, paramC);
    }

    /** If a tag matches, invoke a method on the current object.
	Parameters can be extracted from sub-elements of the current
	tag.
    */
    public XmlAction methodSetter(String method, int paramC, String paramTypes[]) {
	return new MethodSetter(method, paramC, paramTypes);
    }

    /** Extract the method param from the body of the tag
     */
    public XmlAction methodParam(int ord) {
	return new MethodParam(ord, null); // use body as value
    }

    /** Extract the method param from a tag attribute
     */
    public XmlAction methodParam(int ord, String attrib) {
	return new MethodParam(ord, attrib);
    }

    /** Pop the object stack
     */
    public XmlAction popStack() {
	return new PopStack();
    }

}

//-------------------- "Core" actions --------------------
// XXX XXX XXX Need to move the "standard" actions in individual files
/**
 * Create an object of the specified or override Java class name.
 */
class ObjectCreate extends XmlAction {
    String className;
    String attrib;

    /**
     * Create an object of the specified class name.
     *
     * @param classN Fully qualified name of the Java class to instantiate
     */
    public ObjectCreate(String classN) {
	className=classN;
    }

    /**
     * Create an object of the specified default class name, unless an
     * attribute with the specified name is present, in which case the value
     * of this attribute overrides the default class name.
     *
     * @param classN Fully qualified name of the Java class to instantiate
     *  if the specified attribute name is not present
     * @param attrib Name of the attribute that may contain a fully qualified
     *  name of a Java class that overrides the default
     */
    public ObjectCreate(String classN, String attrib) {
	className=classN;
	this.attrib=attrib;
    }

    public void start( SaxContext ctx) throws Exception {
	Stack st=ctx.getObjectStack();
	int top=ctx.getTagCount()-1;
	String tag=ctx.getTag(top);
	String classN=className;

	if( attrib!=null) {
	    AttributeList attributes = ctx.getAttributeList( top );
	    if (attributes.getValue(attrib) != null)
		classN= attributes.getValue(attrib);
	}
	Class c=Class.forName( classN );
	Object o=c.newInstance();
	st.push(o);
	if( ctx.getDebug() > 0 ) ctx.log("new "  + attrib + " " + classN + " "  + tag  + " " + o);
    }

    public void cleanup( SaxContext ctx) {
	Stack st=ctx.getObjectStack();
	String tag=ctx.getTag(ctx.getTagCount()-1);
	Object o=st.pop();
	if( ctx.getDebug() > 0 ) ctx.log("pop " + tag + " " + o.getClass().getName() + ": " + o);
    }
}


/** Set object properties using XML attribute list
 */
class SetProperties extends XmlAction {
    //    static Class paramT[]=new Class[] { "String".getClass() };

    public SetProperties() {
    }

    public void start( SaxContext ctx ) {
	Stack st=ctx.getObjectStack();
	Object elem=st.peek();
	int top=ctx.getTagCount()-1;
	AttributeList attributes = ctx.getAttributeList( top );

	for (int i = 0; i < attributes.getLength (); i++) {
	    String type = attributes.getType (i);
	    String name=attributes.getName(i);
	    String value=attributes.getValue(i);

	    setProperty( ctx, elem, name, value );
	}

    }

    /** Find a method with the right name
	If found, call the method ( if param is int or boolean we'll convert value to
	the right type before) - that means you can have setDebug(1).
    */
    static void setProperty( SaxContext ctx, Object o, String name, String value ) {
	if( ctx.getDebug() > 1 ) ctx.log("setProperty(" + o.getClass() + " " +  name + "="  + value  +")" );

	String setter= "set" +capitalize(name);

	try {
	    Method methods[]=o.getClass().getMethods();
	    Method setPropertyMethod=null;

	    // First, the ideal case - a setFoo( String ) method
	    for( int i=0; i< methods.length; i++ ) {
		Class paramT[]=methods[i].getParameterTypes();
		if( setter.equals( methods[i].getName() ) &&
		    paramT.length == 1 &&
		    "java.lang.String".equals( paramT[0].getName())) {

		    methods[i].invoke( o, new Object[] { value } );
		    return;
		}
	    }

	    // Try a setFoo ( int ) or ( boolean )
	    for( int i=0; i< methods.length; i++ ) {
		boolean ok=true;
		if( setter.equals( methods[i].getName() ) &&
		    methods[i].getParameterTypes().length == 1) {

		    // match - find the type and invoke it
		    Class paramType=methods[i].getParameterTypes()[0];
		    Object params[]=new Object[1];
		    if ("java.lang.Integer".equals( paramType.getName()) ||
			"int".equals( paramType.getName())) {
			try {
			    params[0]=new Integer(value);
			} catch( NumberFormatException ex ) {ok=false;}
		    } else if ("java.lang.Boolean".equals( paramType.getName()) ||
			"boolean".equals( paramType.getName())) {
			params[0]=new Boolean(value);
		    } else {
			ctx.log("Unknown type " + paramType.getName() );
		    }

		    if( ok ) {
			//	System.out.println("XXX: " + methods[i] + " " + o + " " + params[0] );
			methods[i].invoke( o, params );
			return;
		    }
		}

		// save "setProperty" for later
		if( "setProperty".equals( methods[i].getName())) {
		    setPropertyMethod=methods[i];
		}
	    }

	    // Ok, no setXXX found, try a setProperty("name", "value")
	    if( setPropertyMethod != null ) {
		Object params[]=new Object[2];
		params[0]=name;
		params[1]=value;
		setPropertyMethod.invoke( o, params );
	    }

	} catch( SecurityException ex1 ) {
	    if( ctx.getDebug() > 0 ) ctx.log("SecurityException for " + o.getClass() + " " +  name + "="  + value  +")" );
	    if( ctx.getDebug() > 1 ) ex1.printStackTrace();
	} catch (IllegalAccessException iae) {
	    if( ctx.getDebug() > 0 ) ctx.log("IllegalAccessException for " + o.getClass() + " " +  name + "="  + value  +")" );
	    if( ctx.getDebug() > 1 ) iae.printStackTrace();
	} catch (InvocationTargetException ie) {
	    if( ctx.getDebug() > 0 ) ctx.log("InvocationTargetException for " + o.getClass() + " " +  name + "="  + value  +")" );
	    if( ctx.getDebug() > 1 ) ie.printStackTrace();
	}
    }

    /** Reverse of Introspector.decapitalize
     */
    static String capitalize(String name) {
	if (name == null || name.length() == 0) {
	    return name;
	}
	char chars[] = name.toCharArray();
	chars[0] = Character.toUpperCase(chars[0]);
	return new String(chars);
    }

}


/** Set parent
 */
class SetParent extends XmlAction {
    String childM;
    String paramT = null;
    public SetParent(String p) {
	childM=p;
    }
    public SetParent(String p, String c) {
	childM=p;
	paramT=c;
    }

    public void end( SaxContext ctx) throws Exception {
	Stack st=ctx.getObjectStack();

	Object obj=st.pop();
	Object parent=st.peek();
	st.push( obj ); // put it back

	String parentC=parent.getClass().getName();
	if( ctx.getDebug() > 0 ) ctx.log("Calling " + obj.getClass().getName() + "." + childM +
					 " " + parentC);

	Class params[]=new Class[1];
	if( paramT==null) {
	    params[0]=parent.getClass();
	} else {
	    params[0]=Class.forName( paramT );
	}
	Method m=obj.getClass().getMethod( childM, params );
	m.invoke(obj, new Object[] { parent } );
    }
}

/** Set parent
 */
class AddChild extends XmlAction {
    String parentM;
    String paramT;

    public AddChild(String p, String c) {
	parentM=p;
	paramT=c;
    }

    public void end( SaxContext ctx) throws Exception {
	Stack st=ctx.getObjectStack();

	Object obj=st.pop();
	Object parent=st.peek();
	st.push( obj ); // put it back

	String parentC=parent.getClass().getName();
	if( ctx.getDebug() >0) ctx.log("Calling " + parentC + "." + parentM  +" " + obj  );

	Class params[]=new Class[1];
	if( paramT==null) {
	    params[0]=obj.getClass();
	} else {
	    params[0]=Class.forName( paramT );
	}
	Method m=parent.getClass().getMethod( parentM, params );
	m.invoke(parent, new Object[] { obj } );
    }
}

/**
 */
class  MethodSetter extends 	    XmlAction {
    String mName;
    int paramC;
    String paramTypes[];

    public MethodSetter( String mName, int paramC) {
	this.mName=mName;
	this.paramC=paramC;
    }

    public MethodSetter( String mName, int paramC, String paramTypes[]) {
	this.mName=mName;
	this.paramC=paramC;
	this.paramTypes=paramTypes;
    }

    public void start( SaxContext ctx) {
	Stack st=ctx.getObjectStack();
	if(paramC==0) return;
	String params[]=new String[paramC];
	st.push( params );
    }

    static final Class STRING_CLASS="String".getClass(); // XXX is String.CLASS valid in 1.1 ?

    public void end( SaxContext ctx) throws Exception {
	Stack st=ctx.getObjectStack();
	String params[]=null;
	if( paramC >0 ) params=(String []) st.pop();
	Object parent=st.peek();

	if( paramC == 0 ) {
	    params=new String[1];
	    params[0]= ctx.getBody().trim();
	    if( ctx.getDebug() > 0 ) ctx.log("" + parent.getClass().getName() + "." + mName + "( " + params[0] + ")");
	}

	Class paramT[]=new Class[params.length];
	Object realParam[]=new Object[params.length];
	for (int i=0; i< params.length; i++ ) {
	    if( paramTypes==null) {
		realParam[i]=params[i];
		paramT[i]=STRING_CLASS;
	    } else {
		// XXX Add more types
		if( "int".equals( paramTypes[i] ) ) {
		    realParam[i]=new Integer( params[i] );
		    paramT[i]=int.class;
		} else {
		    realParam[i]=params[i];
		    paramT[i]=STRING_CLASS;
		}
	    }
	}

	Method m=null;
	try {
	    m=parent.getClass().getMethod( mName, paramT );
	} catch( NoSuchMethodException ex ) {
	    ctx.log("Can't find method " + mName + " in " + parent + " CLASS " + parent.getClass());
	    return;
	}
	m.invoke( parent, realParam );

	if(ctx.getDebug() > 0 ) {
	    // debug
	    StringBuffer sb=new StringBuffer();
	    sb.append("" + parent.getClass().getName() + "." + mName + "( " );
	    for(int i=0; i<paramC; i++ ) {
		if(i>0) sb.append( ", ");
		sb.append(params[i]);
	    }
	    sb.append(")");
	    if( ctx.getDebug() > 0 ) ctx.log(sb.toString());
	}
    }
}

/**
 */
class  MethodParam extends XmlAction {
    int paramId;
    String attrib;

    public MethodParam( int paramId, String attrib) {
	this.paramId=paramId;
	this.attrib=attrib;
    }

    // If param is an attrib, set it
    public void start( SaxContext ctx) {
	if( attrib==null) return;

	Stack st=ctx.getObjectStack();
	String h[]=(String[])st.peek();

	int top=ctx.getTagCount()-1;
	AttributeList attributes = ctx.getAttributeList( top );
	h[paramId]= attributes.getValue(attrib);
    }

    // If param is the body, set it
    public void end( SaxContext ctx) {
	if( attrib!=null) return;
	Stack st=ctx.getObjectStack();
	String h[]=(String[])st.peek();
	h[paramId]= ctx.getBody().trim();
    }
}

/**
 */
class PopStack extends XmlAction {
    public PopStack() {
	super();
    }

    public void end( SaxContext ctx) {
	Stack st=ctx.getObjectStack();
	Object top = st.pop();
	if( ctx.getDebug() > 0 ) ctx.log("Pop " + top.getClass().getName());
    }
}