package com.sun.org.apache.xalan.internal.xsltc.compiler;
import com.sun.org.apache.bcel.internal.generic.ALOAD;
import com.sun.org.apache.bcel.internal.generic.ASTORE;
import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE;
import com.sun.org.apache.bcel.internal.generic.INVOKESPECIAL;
import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL;
import com.sun.org.apache.bcel.internal.generic.InstructionList;
import com.sun.org.apache.bcel.internal.generic.LocalVariableGen;
import com.sun.org.apache.bcel.internal.generic.NEW;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeSetType;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.NodeType;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ReferenceType;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util;
final class FilterParentPath extends Expression {
private Expression _filterExpr;
private Expression _path;
private boolean _hasDescendantAxis = false;
public FilterParentPath(Expression filterExpr, Expression path) {
(_path = path).setParent(this);
(_filterExpr = filterExpr).setParent(this);
}
public void setParser(Parser parser) {
super.setParser(parser);
_filterExpr.setParser(parser);
_path.setParser(parser);
}
public String toString() {
return "FilterParentPath(" + _filterExpr + ", " + _path + ')';
}
public void setDescendantAxis() {
_hasDescendantAxis = true;
}
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
final Type ftype = _filterExpr.typeCheck(stable);
if (ftype instanceof NodeSetType == false) {
if (ftype instanceof ReferenceType) {
_filterExpr = new CastExpr(_filterExpr, Type.NodeSet);
}
else if (ftype instanceof NodeType) {
_filterExpr = new CastExpr(_filterExpr, Type.NodeSet);
}
else {
throw new TypeCheckError(this);
}
}
final Type ptype = _path.typeCheck(stable);
if (!(ptype instanceof NodeSetType)) {
_path = new CastExpr(_path, Type.NodeSet);
}
return _type = Type.NodeSet;
}
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
final int initSI = cpg.addMethodref(STEP_ITERATOR_CLASS,
"<init>",
"("
+NODE_ITERATOR_SIG
+NODE_ITERATOR_SIG
+")V");
_filterExpr.translate(classGen, methodGen);
LocalVariableGen filterTemp =
methodGen.addLocalVariable("filter_parent_path_tmp1",
Util.getJCRefType(NODE_ITERATOR_SIG),
null, null);
filterTemp.setStart(il.append(new ASTORE(filterTemp.getIndex())));
_path.translate(classGen, methodGen);
LocalVariableGen pathTemp =
methodGen.addLocalVariable("filter_parent_path_tmp2",
Util.getJCRefType(NODE_ITERATOR_SIG),
null, null);
pathTemp.setStart(il.append(new ASTORE(pathTemp.getIndex())));
il.append(new NEW(cpg.addClass(STEP_ITERATOR_CLASS)));
il.append(DUP);
filterTemp.setEnd(il.append(new ALOAD(filterTemp.getIndex())));
pathTemp.setEnd(il.append(new ALOAD(pathTemp.getIndex())));
il.append(new INVOKESPECIAL(initSI));
if (_hasDescendantAxis) {
final int incl = cpg.addMethodref(NODE_ITERATOR_BASE,
"includeSelf",
"()" + NODE_ITERATOR_SIG);
il.append(new INVOKEVIRTUAL(incl));
}
SyntaxTreeNode parent = getParent();
boolean parentAlreadyOrdered =
(parent instanceof RelativeLocationPath)
|| (parent instanceof FilterParentPath)
|| (parent instanceof KeyCall)
|| (parent instanceof CurrentCall)
|| (parent instanceof DocumentCall);
if (!parentAlreadyOrdered) {
final int order = cpg.addInterfaceMethodref(DOM_INTF,
ORDER_ITERATOR,
ORDER_ITERATOR_SIG);
il.append(methodGen.loadDOM());
il.append(SWAP);
il.append(methodGen.loadContextNode());
il.append(new INVOKEINTERFACE(order, 3));
}
}
}