/*
* Copyright (C) 2010-2015 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.javac;
import java.util.Collections;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.Map;
import static lombok.javac.Javac.*;
import lombok.javac.JavacTreeMaker.TypeTag;
import com.sun.source.tree.ClassTree;
import com.sun.source.tree.LabeledStatementTree;
import com.sun.source.tree.NewClassTree;
import com.sun.source.tree.VariableTree;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.JCClassDecl;
import com.sun.tools.javac.tree.JCTree.JCNewClass;
import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
import com.sun.tools.javac.tree.TreeCopier;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.List;
/**
* Makes a copy of any AST node, with some exceptions.
* Exceptions:
* - The symbol ('sym') of a copied variable isn't copied.
*
- all labels are removed.
*
*
* The purpose of this class is to make a copy, and then the copy is attributed (resolution info is added). These exceptions
* are to work around apparent bugs (or at least inconsistencies) in javac sources.
*/
public class TreeMirrorMaker extends TreeCopier {
private final IdentityHashMap originalToCopy = new IdentityHashMap();
public TreeMirrorMaker(JavacTreeMaker maker, Context context) {
super(maker.getUnderlyingTreeMaker());
}
@Override public T copy(T original) {
T copy = super.copy(original);
originalToCopy.put(original, copy);
return copy;
}
@Override public T copy(T original, Void p) {
T copy = super.copy(original, p);
originalToCopy.put(original, copy);
return copy;
}
@Override public List copy(List originals) {
List copies = super.copy(originals);
if (originals != null) {
Iterator it1 = originals.iterator();
Iterator it2 = copies.iterator();
while (it1.hasNext()) originalToCopy.put(it1.next(), it2.next());
}
return copies;
}
@Override public List copy(List originals, Void p) {
List copies = super.copy(originals, p);
if (originals != null) {
Iterator it1 = originals.iterator();
Iterator it2 = copies.iterator();
while (it1.hasNext()) originalToCopy.put(it1.next(), it2.next());
}
return copies;
}
public Map getOriginalToCopyMap() {
return Collections.unmodifiableMap(originalToCopy);
}
// Monitor issue 205 and issue 694 when making changes here.
@Override public JCTree visitVariable(VariableTree node, Void p) {
JCVariableDecl original = node instanceof JCVariableDecl ? (JCVariableDecl) node : null;
JCVariableDecl copy = (JCVariableDecl) super.visitVariable(node, p);
if (original == null) return copy;
copy.sym = original.sym;
if (copy.sym != null) copy.type = original.type;
if (copy.type != null) {
boolean wipeSymAndType = copy.type.isErroneous();
if (!wipeSymAndType) {
TypeTag typeTag = TypeTag.typeTag(copy.type);
wipeSymAndType = (CTC_NONE.equals(typeTag) || CTC_ERROR.equals(typeTag) || CTC_UNKNOWN.equals(typeTag) || CTC_UNDETVAR.equals(typeTag));
}
if (wipeSymAndType) {
copy.sym = null;
copy.type = null;
}
}
return copy;
}
// Fix for NPE in HandleVal. See http://code.google.com/p/projectlombok/issues/detail?id=299
// This and visitVariable is rather hacky but we're working around evident bugs or at least inconsistencies in javac.
@Override public JCTree visitLabeledStatement(LabeledStatementTree node, Void p) {
return node.getStatement().accept(this, p);
}
@Override public JCTree visitNewClass(NewClassTree node, Void p) {
JCNewClass copy = (JCNewClass) super.visitNewClass(node, p);
return copy;
}
@Override public JCTree visitClass(ClassTree node, Void p) {
JCClassDecl copy = (JCClassDecl) super.visitClass(node, p);
return copy;
}
}