argNames[0] = DOCUMENT_PNAME;
argNames[1] = ITERATOR_PNAME;
argNames[2] = TRANSLET_OUTPUT_PNAME;
final InstructionList il = new InstructionList();
final MethodGenerator transf =
new MethodGenerator(ACC_PUBLIC,
org.apache.bcel.generic.Type.VOID,
argTypes, argNames,
"transform",
_className,
il,
classGen.getConstantPool());
transf.addException("org.apache.xalan.xsltc.TransletException");
// Define and initialize current with the root node
final LocalVariableGen current =
transf.addLocalVariable("current",
org.apache.bcel.generic.Type.INT,
il.getEnd(), null);
final String applyTemplatesSig = classGen.getApplyTemplatesSig();
final int applyTemplates = cpg.addMethodref(getClassName(),
"applyTemplates",
applyTemplatesSig);
final int domField = cpg.addFieldref(getClassName(),
DOM_FIELD,
DOM_INTF_SIG);
// push translet for PUTFIELD
il.append(classGen.loadTranslet());
// prepare appropriate DOM implementation
if (isMultiDocument()) {
il.append(new NEW(cpg.addClass(MULTI_DOM_CLASS)));
il.append(DUP);
}
il.append(classGen.loadTranslet());
il.append(transf.loadDOM());
il.append(new INVOKEVIRTUAL(cpg.addMethodref(TRANSLET_CLASS,
"makeDOMAdapter",
"("+DOM_INTF_SIG+")"+
DOM_ADAPTER_SIG)));
// DOMAdapter is on the stack
if (isMultiDocument()) {
final int init = cpg.addMethodref(MULTI_DOM_CLASS,
"<init>",
"("+DOM_INTF_SIG+")V");
il.append(new INVOKESPECIAL(init));
// MultiDOM is on the stack
}
//store to _dom variable
il.append(new PUTFIELD(domField));
// continue with globals initialization
il.append(new PUSH(cpg, DOM.ROOTNODE));
il.append(new ISTORE(current.getIndex()));
// Transfer the output settings to the output post-processor
il.append(classGen.loadTranslet());
il.append(transf.loadHandler());
final int index = cpg.addMethodref(TRANSLET_CLASS,
"transferOutputSettings",
"("+OUTPUT_HANDLER_SIG+")V");
il.append(new INVOKEVIRTUAL(index));
// Compile buildKeys -- TODO: omit if not needed
final String keySig = compileBuildKeys(classGen);
final int keyIdx = cpg.addMethodref(getClassName(),
"buildKeys", keySig);
il.append(classGen.loadTranslet()); // The 'this' pointer
il.append(classGen.loadTranslet());
il.append(new GETFIELD(domField)); // The DOM reference
il.append(transf.loadIterator()); // Not really used, but...
il.append(transf.loadHandler()); // The output handler
il.append(new PUSH(cpg, DOM.ROOTNODE)); // Start with the root node
il.append(new INVOKEVIRTUAL(keyIdx));
// Look for top-level elements that need handling
final Enumeration toplevel = elements();
if ((_globals.size() > 0) || (toplevel.hasMoreElements())) {
// Compile method for handling top-level elements
final String topLevelSig = compileTopLevel(classGen, toplevel);
// Get a reference to that method
final int topLevelIdx = cpg.addMethodref(getClassName(),
"topLevel",
topLevelSig);
// Push all parameters on the stack and call topLevel()
il.append(classGen.loadTranslet()); // The 'this' pointer
il.append(classGen.loadTranslet());
il.append(new GETFIELD(domField)); // The DOM reference
il.append(transf.loadIterator());
il.append(transf.loadHandler()); // The output handler
il.append(new INVOKEVIRTUAL(topLevelIdx));
}
// start document
il.append(transf.loadHandler());
il.append(transf.startDocument());
// push first arg for applyTemplates
il.append(classGen.loadTranslet());
// push translet for GETFIELD to get DOM arg
il.append(classGen.loadTranslet());
il.append(new GETFIELD(domField));
// push remaining 2 args
il.append(transf.loadIterator());
il.append(transf.loadHandler());
il.append(new INVOKEVIRTUAL(applyTemplates));
// endDocument
il.append(transf.loadHandler());
il.append(transf.endDocument());
il.append(RETURN);
// Compute max locals + stack and add method to class
transf.stripAttributes(true);
transf.setMaxLocals();
transf.setMaxStack();
transf.removeNOPs();
classGen.addMethod(transf.getMethod());
}