/**
* This method is part of a little trick that is needed to use local variables inside nested
* for-each loops. See the initializeVariables() method in the ForEach class for an explanation
*/
public void initialize(ClassGenerator classGen, MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
// This is only done for local variables that are actually used
if (isLocal() && !_refs.isEmpty()) {
// Create a variable slot if none is allocated
if (_local == null) {
_local = methodGen.addLocalVariable2(getEscapedName(), _type.toJCType(), null);
}
// Push the default value on the JVM's stack
if ((_type instanceof IntType)
|| (_type instanceof NodeType)
|| (_type instanceof BooleanType))
il.append(new ICONST(0)); // 0 for node-id, integer and boolean
else if (_type instanceof RealType)
il.append(new DCONST(0)); // 0.0 for floating point numbers
else il.append(new ACONST_NULL()); // and 'null' for anything else
// Mark the store as the start of the live range of the variable
_local.setStart(il.append(_type.STORE(_local.getIndex())));
}
}
