Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 package com.sun.tools.javac.tree;

 import com.sun.source.tree.*;

 import com.sun.tools.javac.tree.JCTree.*;

 import com.sun.tools.javac.util.List;

 import com.sun.tools.javac.util.ListBuffer;

 /**

  * Creates a copy of a tree, using a given TreeMaker.

  * Names, literal values, etc are shared with the original.

  *

  *  <p><b>This is NOT part of any supported API.

  *  If you write code that depends on this, you do so at your own risk.

  *  This code and its internal interfaces are subject to change or

  *  deletion without notice.</b>

  */

 public class TreeCopier<P> implements TreeVisitor<JCTree,P> {

     private TreeMaker M;

     /** Creates a new instance of TreeCopier */

     public TreeCopier(TreeMaker M) {

         this.M = M;

     }

     public <T extends JCTree> T copy(T tree) {

         return copy(tree, null);

     }

     @SuppressWarnings("unchecked")

     public <T extends JCTree> T copy(T tree, P p) {

         if (tree == null)

             return null;

         return (T) (tree.accept(this, p));

     }

     public <T extends JCTree> List<T> copy(List<T> trees) {

         return copy(trees, null);

     }

     public <T extends JCTree> List<T> copy(List<T> trees, P p) {

         if (trees == null)

             return null;

         ListBuffer<T> lb = new ListBuffer<T>();

         for (T tree: trees)

             lb.append(copy(tree, p));

         return lb.toList();

     }

     public JCTree visitAnnotation(AnnotationTree node, P p) {

         JCAnnotation t = (JCAnnotation) node;

         JCTree annotationType = copy(t.annotationType, p);

         List<JCExpression> args = copy(t.args, p);

         return M.at(t.pos).Annotation(annotationType, args);

     }

     public JCTree visitAssert(AssertTree node, P p) {

         JCAssert t = (JCAssert) node;

         JCExpression cond = copy(t.cond, p);

         JCExpression detail = copy(t.detail, p);

         return M.at(t.pos).Assert(cond, detail);

     }

     public JCTree visitAssignment(AssignmentTree node, P p) {

         JCAssign t = (JCAssign) node;

         JCExpression lhs = copy(t.lhs, p);

         JCExpression rhs = copy(t.rhs, p);

         return M.at(t.pos).Assign(lhs, rhs);

     }

     public JCTree visitCompoundAssignment(CompoundAssignmentTree node, P p) {

         JCAssignOp t = (JCAssignOp) node;

         JCTree lhs = copy(t.lhs, p);

         JCTree rhs = copy(t.rhs, p);

         return M.at(t.pos).Assignop(t.getTag(), lhs, rhs);

     }

     public JCTree visitBinary(BinaryTree node, P p) {

         JCBinary t = (JCBinary) node;

         JCExpression lhs = copy(t.lhs, p);

         JCExpression rhs = copy(t.rhs, p);

         return M.at(t.pos).Binary(t.getTag(), lhs, rhs);

     }

     public JCTree visitBlock(BlockTree node, P p) {

         JCBlock t = (JCBlock) node;

         List<JCStatement> stats = copy(t.stats, p);

         return M.at(t.pos).Block(t.flags, stats);

     }

     public JCTree visitBreak(BreakTree node, P p) {

         JCBreak t = (JCBreak) node;

         return M.at(t.pos).Break(t.label);

     }

     public JCTree visitCase(CaseTree node, P p) {

         JCCase t = (JCCase) node;

         JCExpression pat = copy(t.pat, p);

         List<JCStatement> stats = copy(t.stats, p);

         return M.at(t.pos).Case(pat, stats);

     }

     public JCTree visitCatch(CatchTree node, P p) {

         JCCatch t = (JCCatch) node;

         JCVariableDecl param = copy(t.param, p);

         JCBlock body = copy(t.body, p);

         return M.at(t.pos).Catch(param, body);

     }

     public JCTree visitClass(ClassTree node, P p) {

         JCClassDecl t = (JCClassDecl) node;

         JCModifiers mods = copy(t.mods, p);

         List<JCTypeParameter> typarams = copy(t.typarams, p);

         JCExpression extending = copy(t.extending, p);

         List<JCExpression> implementing = copy(t.implementing, p);

         List<JCTree> defs = copy(t.defs, p);

         return M.at(t.pos).ClassDef(mods, t.name, typarams, extending, implementing, defs);

     }

     public JCTree visitConditionalExpression(ConditionalExpressionTree node, P p) {

         JCConditional t = (JCConditional) node;

         JCExpression cond = copy(t.cond, p);

         JCExpression truepart = copy(t.truepart, p);

         JCExpression falsepart = copy(t.falsepart, p);

         return M.at(t.pos).Conditional(cond, truepart, falsepart);

     }

     public JCTree visitContinue(ContinueTree node, P p) {

         JCContinue t = (JCContinue) node;

         return M.at(t.pos).Continue(t.label);

     }

     public JCTree visitDoWhileLoop(DoWhileLoopTree node, P p) {

         JCDoWhileLoop t = (JCDoWhileLoop) node;

         JCStatement body = copy(t.body, p);

         JCExpression cond = copy(t.cond, p);

         return M.at(t.pos).DoLoop(body, cond);

     }

     public JCTree visitErroneous(ErroneousTree node, P p) {

         JCErroneous t = (JCErroneous) node;

         List<? extends JCTree> errs = copy(t.errs, p);

         return M.at(t.pos).Erroneous(errs);

     }

     public JCTree visitExpressionStatement(ExpressionStatementTree node, P p) {

         JCExpressionStatement t = (JCExpressionStatement) node;

         JCExpression expr = copy(t.expr, p);

         return M.at(t.pos).Exec(expr);

     }

     public JCTree visitEnhancedForLoop(EnhancedForLoopTree node, P p) {

         JCEnhancedForLoop t = (JCEnhancedForLoop) node;

         JCVariableDecl var = copy(t.var, p);

         JCExpression expr = copy(t.expr, p);

         JCStatement body = copy(t.body, p);

         return M.at(t.pos).ForeachLoop(var, expr, body);

     }

     public JCTree visitForLoop(ForLoopTree node, P p) {

         JCForLoop t = (JCForLoop) node;

         List<JCStatement> init = copy(t.init, p);

         JCExpression cond = copy(t.cond, p);

         List<JCExpressionStatement> step = copy(t.step, p);

         JCStatement body = copy(t.body, p);

         return M.at(t.pos).ForLoop(init, cond, step, body);

     }

     public JCTree visitIdentifier(IdentifierTree node, P p) {

         JCIdent t = (JCIdent) node;

         return M.at(t.pos).Ident(t.name);

     }

     public JCTree visitIf(IfTree node, P p) {

         JCIf t = (JCIf) node;

         JCExpression cond = copy(t.cond, p);

         JCStatement thenpart = copy(t.thenpart, p);

         JCStatement elsepart = copy(t.elsepart, p);

         return M.at(t.pos).If(cond, thenpart, elsepart);

     }

     public JCTree visitImport(ImportTree node, P p) {

         JCImport t = (JCImport) node;

         JCTree qualid = copy(t.qualid, p);

         return M.at(t.pos).Import(qualid, t.staticImport);

     }

     public JCTree visitArrayAccess(ArrayAccessTree node, P p) {

         JCArrayAccess t = (JCArrayAccess) node;

         JCExpression indexed = copy(t.indexed, p);

         JCExpression index = copy(t.index, p);

         return M.at(t.pos).Indexed(indexed, index);

     }

     public JCTree visitLabeledStatement(LabeledStatementTree node, P p) {

         JCLabeledStatement t = (JCLabeledStatement) node;

         JCStatement body = copy(t.body, p);

         return M.at(t.pos).Labelled(t.label, t.body);

     }

     public JCTree visitLiteral(LiteralTree node, P p) {

         JCLiteral t = (JCLiteral) node;

         return M.at(t.pos).Literal(t.typetag, t.value);

     }

     public JCTree visitMethod(MethodTree node, P p) {

         JCMethodDecl t  = (JCMethodDecl) node;

         JCModifiers mods = copy(t.mods, p);

         JCExpression restype = copy(t.restype, p);

         List<JCTypeParameter> typarams = copy(t.typarams, p);

         List<JCVariableDecl> params = copy(t.params, p);

         List<JCExpression> thrown = copy(t.thrown, p);

         JCBlock body = copy(t.body, p);

         JCExpression defaultValue = copy(t.defaultValue, p);

         return M.at(t.pos).MethodDef(mods, t.name, restype, typarams, params, thrown, body, defaultValue);

     }

     public JCTree visitMethodInvocation(MethodInvocationTree node, P p) {

         JCMethodInvocation t = (JCMethodInvocation) node;

         List<JCExpression> typeargs = copy(t.typeargs, p);

         JCExpression meth = copy(t.meth, p);

         List<JCExpression> args = copy(t.args, p);

         return M.at(t.pos).Apply(typeargs, meth, args);

     }

     public JCTree visitModifiers(ModifiersTree node, P p) {

         JCModifiers t = (JCModifiers) node;

         List<JCAnnotation> annotations = copy(t.annotations, p);

         return M.at(t.pos).Modifiers(t.flags, annotations);

     }

     public JCTree visitNewArray(NewArrayTree node, P p) {

         JCNewArray t = (JCNewArray) node;

         JCExpression elemtype = copy(t.elemtype, p);

         List<JCExpression> dims = copy(t.dims, p);

         List<JCExpression> elems = copy(t.elems, p);

         return M.at(t.pos).NewArray(elemtype, dims, elems);

     }

     public JCTree visitNewClass(NewClassTree node, P p) {

         JCNewClass t = (JCNewClass) node;

         JCExpression encl = copy(t.encl, p);

         List<JCExpression> typeargs = copy(t.typeargs, p);

         JCExpression clazz = copy(t.clazz, p);

         List<JCExpression> args = copy(t.args, p);

         JCClassDecl def = copy(t.def, p);

         return M.at(t.pos).NewClass(encl, typeargs, clazz, args, def);

     }

     public JCTree visitLambdaExpression(LambdaExpressionTree node, P p) {

         JCLambda t = (JCLambda) node;

         List<JCVariableDecl> params = copy(t.params, p);

         JCTree body = copy(t.body, p);

         return M.at(t.pos).Lambda(params, body);

     }

     public JCTree visitParenthesized(ParenthesizedTree node, P p) {

         JCParens t = (JCParens) node;

         JCExpression expr = copy(t.expr, p);

         return M.at(t.pos).Parens(expr);

     }

     public JCTree visitReturn(ReturnTree node, P p) {

         JCReturn t = (JCReturn) node;

         JCExpression expr = copy(t.expr, p);

         return M.at(t.pos).Return(expr);

     }

     public JCTree visitMemberSelect(MemberSelectTree node, P p) {

         JCFieldAccess t = (JCFieldAccess) node;

         JCExpression selected = copy(t.selected, p);

         return M.at(t.pos).Select(selected, t.name);

     }

     public JCTree visitMemberReference(MemberReferenceTree node, P p) {

         JCMemberReference t = (JCMemberReference) node;

         JCExpression expr = copy(t.expr, p);

         List<JCExpression> typeargs = copy(t.typeargs, p);

         return M.at(t.pos).Reference(t.mode, t.name, expr, typeargs);

     }

     public JCTree visitEmptyStatement(EmptyStatementTree node, P p) {

         JCSkip t = (JCSkip) node;

         return M.at(t.pos).Skip();

     }

     public JCTree visitSwitch(SwitchTree node, P p) {

         JCSwitch t = (JCSwitch) node;

         JCExpression selector = copy(t.selector, p);

         List<JCCase> cases = copy(t.cases, p);

         return M.at(t.pos).Switch(selector, cases);

     }

     public JCTree visitSynchronized(SynchronizedTree node, P p) {

         JCSynchronized t = (JCSynchronized) node;

         JCExpression lock = copy(t.lock, p);

         JCBlock body = copy(t.body, p);

         return M.at(t.pos).Synchronized(lock, body);

     }

     public JCTree visitThrow(ThrowTree node, P p) {

         JCThrow t = (JCThrow) node;

         JCTree expr = copy(t.expr, p);

         return M.at(t.pos).Throw(expr);

     }

     public JCTree visitCompilationUnit(CompilationUnitTree node, P p) {

         JCCompilationUnit t = (JCCompilationUnit) node;

         List<JCAnnotation> packageAnnotations = copy(t.packageAnnotations, p);

         JCExpression pid = copy(t.pid, p);

         List<JCTree> defs = copy(t.defs, p);

         return M.at(t.pos).TopLevel(packageAnnotations, pid, defs);

     }

     public JCTree visitTry(TryTree node, P p) {

         JCTry t = (JCTry) node;

         List<JCTree> resources = copy(t.resources, p);

         JCBlock body = copy(t.body, p);

         List<JCCatch> catchers = copy(t.catchers, p);

         JCBlock finalizer = copy(t.finalizer, p);

         return M.at(t.pos).Try(resources, body, catchers, finalizer);

     }

     public JCTree visitParameterizedType(ParameterizedTypeTree node, P p) {

         JCTypeApply t = (JCTypeApply) node;

         JCExpression clazz = copy(t.clazz, p);

         List<JCExpression> arguments = copy(t.arguments, p);

         return M.at(t.pos).TypeApply(clazz, arguments);

     }

     public JCTree visitUnionType(UnionTypeTree node, P p) {

         JCTypeUnion t = (JCTypeUnion) node;

         List<JCExpression> components = copy(t.alternatives, p);

         return M.at(t.pos).TypeUnion(components);

     }

     public JCTree visitArrayType(ArrayTypeTree node, P p) {

         JCArrayTypeTree t = (JCArrayTypeTree) node;

         JCExpression elemtype = copy(t.elemtype, p);

         return M.at(t.pos).TypeArray(elemtype);

     }

     public JCTree visitTypeCast(TypeCastTree node, P p) {

         JCTypeCast t = (JCTypeCast) node;

         JCTree clazz = copy(t.clazz, p);

         JCExpression expr = copy(t.expr, p);

         return M.at(t.pos).TypeCast(clazz, expr);

     }

     public JCTree visitPrimitiveType(PrimitiveTypeTree node, P p) {

         JCPrimitiveTypeTree t = (JCPrimitiveTypeTree) node;

         return M.at(t.pos).TypeIdent(t.typetag);

     }

     public JCTree visitTypeParameter(TypeParameterTree node, P p) {

         JCTypeParameter t = (JCTypeParameter) node;

         List<JCExpression> bounds = copy(t.bounds, p);

         return M.at(t.pos).TypeParameter(t.name, bounds);

     }

     public JCTree visitInstanceOf(InstanceOfTree node, P p) {

         JCInstanceOf t = (JCInstanceOf) node;

         JCExpression expr = copy(t.expr, p);

         JCTree clazz = copy(t.clazz, p);

         return M.at(t.pos).TypeTest(expr, clazz);

     }

     public JCTree visitUnary(UnaryTree node, P p) {

         JCUnary t = (JCUnary) node;

         JCExpression arg = copy(t.arg, p);

         return M.at(t.pos).Unary(t.getTag(), arg);

     }

     public JCTree visitVariable(VariableTree node, P p) {

         JCVariableDecl t = (JCVariableDecl) node;

         JCModifiers mods = copy(t.mods, p);

         JCExpression vartype = copy(t.vartype, p);

         JCExpression init = copy(t.init, p);

         return M.at(t.pos).VarDef(mods, t.name, vartype, init);

     }

     public JCTree visitWhileLoop(WhileLoopTree node, P p) {

         JCWhileLoop t = (JCWhileLoop) node;

         JCStatement body = copy(t.body, p);

         JCExpression cond = copy(t.cond, p);

         return M.at(t.pos).WhileLoop(cond, body);

     }

     public JCTree visitWildcard(WildcardTree node, P p) {

         JCWildcard t = (JCWildcard) node;

         TypeBoundKind kind = M.at(t.kind.pos).TypeBoundKind(t.kind.kind);

         JCTree inner = copy(t.inner, p);

         return M.at(t.pos).Wildcard(kind, inner);

     }

     public JCTree visitOther(Tree node, P p) {

         JCTree tree = (JCTree) node;

         switch (tree.getTag()) {

             case LETEXPR: {

                 LetExpr t = (LetExpr) node;

                 List<JCVariableDecl> defs = copy(t.defs, p);

                 JCTree expr = copy(t.expr, p);

                 return M.at(t.pos).LetExpr(defs, expr);

             }

             default:

                 throw new AssertionError("unknown tree tag: " + tree.getTag());

         }

     }

 }