final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
// Load the translet (for call to displayMessage() function)
il.append(classGen.loadTranslet());
switch (elementCount()) {
case 0:
il.append(new PUSH(cpg, ""));
break;
case 1:
SyntaxTreeNode child = (SyntaxTreeNode) elementAt(0);
if (child instanceof Text) {
il.append(new PUSH(cpg, ((Text) child).getText()));
break;
}
// falls through
default:
// Push current output handler onto the stack
il.append(methodGen.loadHandler());
// Replace the current output handler by a ToXMLStream
il.append(new NEW(cpg.addClass(STREAM_XML_OUTPUT)));
il.append(methodGen.storeHandler());
// Push a reference to a StringWriter
il.append(new NEW(cpg.addClass(STRING_WRITER)));
il.append(DUP);
il.append(DUP);
il.append(new INVOKESPECIAL(
cpg.addMethodref(STRING_WRITER, "<init>", "()V")));
// Load ToXMLStream
il.append(methodGen.loadHandler());
il.append(new INVOKESPECIAL(
cpg.addMethodref(STREAM_XML_OUTPUT, "<init>",
"()V")));
// Invoke output.setWriter(STRING_WRITER)
il.append(methodGen.loadHandler());
il.append(SWAP);
il.append(new INVOKEVIRTUAL(
cpg.addMethodref(OUTPUT_BASE, "setWriter",
"("+WRITER_SIG+")V")));
// Invoke output.setEncoding("UTF-8")
il.append(methodGen.loadHandler());
il.append(new PUSH(cpg, "UTF-8")); // other encodings?
il.append(new INVOKEVIRTUAL(
cpg.addMethodref(OUTPUT_BASE, "setEncoding",
"("+STRING_SIG+")V")));
// Invoke output.setOmitXMLDeclaration(true)
il.append(methodGen.loadHandler());
il.append(ICONST_1);
il.append(new INVOKEVIRTUAL(
cpg.addMethodref(OUTPUT_BASE, "setOmitXMLDeclaration",
"(Z)V")));
il.append(methodGen.loadHandler());
il.append(new INVOKEVIRTUAL(
cpg.addMethodref(OUTPUT_BASE, "startDocument",
"()V")));
// Inline translation of contents
translateContents(classGen, methodGen);
il.append(methodGen.loadHandler());
il.append(new INVOKEVIRTUAL(
cpg.addMethodref(OUTPUT_BASE, "endDocument",
"()V")));
// Call toString() on StringWriter
il.append(new INVOKEVIRTUAL(
cpg.addMethodref(STRING_WRITER, "toString",
"()" + STRING_SIG)));
// Restore old output handler
il.append(SWAP);
il.append(methodGen.storeHandler());
break;
}
// Send the resulting string to the message handling method
il.append(new INVOKEVIRTUAL(cpg.addMethodref(TRANSLET_CLASS,
"displayMessage",
"("+STRING_SIG+")V")));
// If 'terminate' attribute is set to 'yes': Instanciate a
// RunTimeException, but it on the stack and throw an exception
if (_terminate == true) {
// Create a new instance of RunTimeException
final int einit = cpg.addMethodref("java.lang.RuntimeException",
"<init>",
"(Ljava/lang/String;)V");
il.append(new NEW(cpg.addClass("java.lang.RuntimeException")));
il.append(DUP);
il.append(new PUSH(cpg,"Termination forced by an " +
"xsl:message instruction"));
il.append(new INVOKESPECIAL(einit));
il.append(ATHROW);
}
