final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
final LocalVariableGen local =
methodGen.addLocalVariable2("ppt",
Util.getJCRefType(NODE_SIG),
il.getEnd());
final com.sun.org.apache.bcel.internal.generic.Instruction loadLocal =
new ILOAD(local.getIndex());
final com.sun.org.apache.bcel.internal.generic.Instruction storeLocal =
new ISTORE(local.getIndex());
if (_right.isWildcard()) {
il.append(methodGen.loadDOM());
il.append(SWAP);
}
else if (_right instanceof StepPattern) {
il.append(DUP);
il.append(storeLocal);
_right.translate(classGen, methodGen);
il.append(methodGen.loadDOM());
local.setEnd(il.append(loadLocal));
}
else {
_right.translate(classGen, methodGen);
if (_right instanceof AncestorPattern) {
il.append(methodGen.loadDOM());
il.append(SWAP);
}
}
final int getParent = cpg.addInterfaceMethodref(DOM_INTF,
GET_PARENT,
GET_PARENT_SIG);
il.append(new INVOKEINTERFACE(getParent, 2));
final SyntaxTreeNode p = getParent();
if (p == null || p instanceof Instruction ||
p instanceof TopLevelElement)
{
_left.translate(classGen, methodGen);
}
else {
il.append(DUP);
il.append(storeLocal);
_left.translate(classGen, methodGen);
il.append(methodGen.loadDOM());
local.setEnd(il.append(loadLocal));
}
methodGen.removeLocalVariable(local);
/*
* If _right is an ancestor pattern, backpatch _left false
* list to the loop that searches for more ancestors.
*/
if (_right instanceof AncestorPattern) {
final AncestorPattern ancestor = (AncestorPattern) _right;
_left.backPatchFalseList(ancestor.getLoopHandle()); // clears list
}
_trueList.append(_right._trueList.append(_left._trueList));
_falseList.append(_right._falseList.append(_left._falseList));
