TreeTranslator.java revision 549
0N/A/*
0N/A * Copyright 1999-2006 Sun Microsystems, Inc. All Rights Reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation. Sun designates this
0N/A * particular file as subject to the "Classpath" exception as provided
0N/A * by Sun in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
0N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
0N/A * CA 95054 USA or visit www.sun.com if you need additional information or
0N/A * have any questions.
0N/A */
0N/A
0N/Apackage com.sun.tools.javac.tree;
0N/A
0N/Aimport com.sun.tools.javac.util.*;
0N/Aimport com.sun.tools.javac.tree.JCTree.*;
0N/A
0N/A/** A subclass of Tree.Visitor, this class defines
0N/A * a general tree translator pattern. Translation proceeds recursively in
0N/A * left-to-right order down a tree, constructing translated nodes by
0N/A * overwriting existing ones. There is one visitor method in this class
0N/A * for every possible kind of tree node. To obtain a specific
0N/A * translator, it suffices to override those visitor methods which
0N/A * do some interesting work. The translator class itself takes care of all
0N/A * navigational aspects.
0N/A *
0N/A * <p><b>This is NOT part of any API supported by Sun Microsystems. If
0N/A * you write code that depends on this, you do so at your own risk.
0N/A * This code and its internal interfaces are subject to change or
0N/A * deletion without notice.</b>
0N/A */
0N/Apublic class TreeTranslator extends JCTree.Visitor {
0N/A
0N/A /** Visitor result field: a tree
0N/A */
0N/A protected JCTree result;
0N/A
0N/A /** Visitor method: Translate a single node.
0N/A */
0N/A @SuppressWarnings("unchecked")
0N/A public <T extends JCTree> T translate(T tree) {
0N/A if (tree == null) {
0N/A return null;
0N/A } else {
0N/A tree.accept(this);
0N/A JCTree result = this.result;
0N/A this.result = null;
0N/A return (T)result; // XXX cast
0N/A }
0N/A }
0N/A
0N/A /** Visitor method: translate a list of nodes.
0N/A */
0N/A public <T extends JCTree> List<T> translate(List<T> trees) {
0N/A if (trees == null) return null;
0N/A for (List<T> l = trees; l.nonEmpty(); l = l.tail)
0N/A l.head = translate(l.head);
0N/A return trees;
0N/A }
0N/A
0N/A /** Visitor method: translate a list of variable definitions.
0N/A */
0N/A public List<JCVariableDecl> translateVarDefs(List<JCVariableDecl> trees) {
0N/A for (List<JCVariableDecl> l = trees; l.nonEmpty(); l = l.tail)
0N/A l.head = translate(l.head);
0N/A return trees;
0N/A }
0N/A
0N/A /** Visitor method: translate a list of type parameters.
0N/A */
0N/A public List<JCTypeParameter> translateTypeParams(List<JCTypeParameter> trees) {
0N/A for (List<JCTypeParameter> l = trees; l.nonEmpty(); l = l.tail)
0N/A l.head = translate(l.head);
0N/A return trees;
0N/A }
0N/A
0N/A /** Visitor method: translate a list of case parts of switch statements.
0N/A */
0N/A public List<JCCase> translateCases(List<JCCase> trees) {
0N/A for (List<JCCase> l = trees; l.nonEmpty(); l = l.tail)
0N/A l.head = translate(l.head);
0N/A return trees;
0N/A }
0N/A
0N/A /** Visitor method: translate a list of catch clauses in try statements.
0N/A */
0N/A public List<JCCatch> translateCatchers(List<JCCatch> trees) {
0N/A for (List<JCCatch> l = trees; l.nonEmpty(); l = l.tail)
0N/A l.head = translate(l.head);
0N/A return trees;
0N/A }
0N/A
0N/A /** Visitor method: translate a list of catch clauses in try statements.
0N/A */
0N/A public List<JCAnnotation> translateAnnotations(List<JCAnnotation> trees) {
0N/A for (List<JCAnnotation> l = trees; l.nonEmpty(); l = l.tail)
0N/A l.head = translate(l.head);
0N/A return trees;
0N/A }
0N/A
0N/A/* ***************************************************************************
0N/A * Visitor methods
0N/A ****************************************************************************/
0N/A
0N/A public void visitTopLevel(JCCompilationUnit tree) {
0N/A tree.pid = translate(tree.pid);
0N/A tree.defs = translate(tree.defs);
0N/A result = tree;
0N/A }
0N/A
0N/A public void visitImport(JCImport tree) {
0N/A tree.qualid = translate(tree.qualid);
0N/A result = tree;
0N/A }
0N/A
0N/A public void visitClassDef(JCClassDecl tree) {
0N/A tree.mods = translate(tree.mods);
0N/A tree.typarams = translateTypeParams(tree.typarams);
0N/A tree.extending = translate(tree.extending);
0N/A tree.implementing = translate(tree.implementing);
0N/A tree.defs = translate(tree.defs);
0N/A result = tree;
0N/A }
0N/A
0N/A public void visitMethodDef(JCMethodDecl tree) {
0N/A tree.mods = translate(tree.mods);
0N/A tree.restype = translate(tree.restype);
0N/A tree.typarams = translateTypeParams(tree.typarams);
0N/A tree.params = translateVarDefs(tree.params);
0N/A tree.thrown = translate(tree.thrown);
0N/A tree.body = translate(tree.body);
0N/A result = tree;
0N/A }
0N/A
0N/A public void visitVarDef(JCVariableDecl tree) {
0N/A tree.mods = translate(tree.mods);
0N/A tree.vartype = translate(tree.vartype);
0N/A tree.init = translate(tree.init);
0N/A result = tree;
0N/A }
0N/A
0N/A public void visitSkip(JCSkip tree) {
0N/A result = tree;
0N/A }
public void visitBlock(JCBlock tree) {
tree.stats = translate(tree.stats);
result = tree;
}
public void visitDoLoop(JCDoWhileLoop tree) {
tree.body = translate(tree.body);
tree.cond = translate(tree.cond);
result = tree;
}
public void visitWhileLoop(JCWhileLoop tree) {
tree.cond = translate(tree.cond);
tree.body = translate(tree.body);
result = tree;
}
public void visitForLoop(JCForLoop tree) {
tree.init = translate(tree.init);
tree.cond = translate(tree.cond);
tree.step = translate(tree.step);
tree.body = translate(tree.body);
result = tree;
}
public void visitForeachLoop(JCEnhancedForLoop tree) {
tree.var = translate(tree.var);
tree.expr = translate(tree.expr);
tree.body = translate(tree.body);
result = tree;
}
public void visitLabelled(JCLabeledStatement tree) {
tree.body = translate(tree.body);
result = tree;
}
public void visitSwitch(JCSwitch tree) {
tree.selector = translate(tree.selector);
tree.cases = translateCases(tree.cases);
result = tree;
}
public void visitCase(JCCase tree) {
tree.pat = translate(tree.pat);
tree.stats = translate(tree.stats);
result = tree;
}
public void visitSynchronized(JCSynchronized tree) {
tree.lock = translate(tree.lock);
tree.body = translate(tree.body);
result = tree;
}
public void visitTry(JCTry tree) {
tree.body = translate(tree.body);
tree.catchers = translateCatchers(tree.catchers);
tree.finalizer = translate(tree.finalizer);
result = tree;
}
public void visitCatch(JCCatch tree) {
tree.param = translate(tree.param);
tree.body = translate(tree.body);
result = tree;
}
public void visitConditional(JCConditional tree) {
tree.cond = translate(tree.cond);
tree.truepart = translate(tree.truepart);
tree.falsepart = translate(tree.falsepart);
result = tree;
}
public void visitIf(JCIf tree) {
tree.cond = translate(tree.cond);
tree.thenpart = translate(tree.thenpart);
tree.elsepart = translate(tree.elsepart);
result = tree;
}
public void visitExec(JCExpressionStatement tree) {
tree.expr = translate(tree.expr);
result = tree;
}
public void visitBreak(JCBreak tree) {
result = tree;
}
public void visitContinue(JCContinue tree) {
result = tree;
}
public void visitReturn(JCReturn tree) {
tree.expr = translate(tree.expr);
result = tree;
}
public void visitThrow(JCThrow tree) {
tree.expr = translate(tree.expr);
result = tree;
}
public void visitAssert(JCAssert tree) {
tree.cond = translate(tree.cond);
tree.detail = translate(tree.detail);
result = tree;
}
public void visitApply(JCMethodInvocation tree) {
tree.meth = translate(tree.meth);
tree.args = translate(tree.args);
result = tree;
}
public void visitNewClass(JCNewClass tree) {
tree.encl = translate(tree.encl);
tree.clazz = translate(tree.clazz);
tree.args = translate(tree.args);
tree.def = translate(tree.def);
result = tree;
}
public void visitNewArray(JCNewArray tree) {
tree.annotations = translate(tree.annotations);
List<List<JCTypeAnnotation>> dimAnnos = List.nil();
for (List<JCTypeAnnotation> origDimAnnos : tree.dimAnnotations)
dimAnnos = dimAnnos.append(translate(origDimAnnos));
tree.dimAnnotations = dimAnnos;
tree.elemtype = translate(tree.elemtype);
tree.dims = translate(tree.dims);
tree.elems = translate(tree.elems);
result = tree;
}
public void visitParens(JCParens tree) {
tree.expr = translate(tree.expr);
result = tree;
}
public void visitAssign(JCAssign tree) {
tree.lhs = translate(tree.lhs);
tree.rhs = translate(tree.rhs);
result = tree;
}
public void visitAssignop(JCAssignOp tree) {
tree.lhs = translate(tree.lhs);
tree.rhs = translate(tree.rhs);
result = tree;
}
public void visitUnary(JCUnary tree) {
tree.arg = translate(tree.arg);
result = tree;
}
public void visitBinary(JCBinary tree) {
tree.lhs = translate(tree.lhs);
tree.rhs = translate(tree.rhs);
result = tree;
}
public void visitTypeCast(JCTypeCast tree) {
tree.clazz = translate(tree.clazz);
tree.expr = translate(tree.expr);
result = tree;
}
public void visitTypeTest(JCInstanceOf tree) {
tree.expr = translate(tree.expr);
tree.clazz = translate(tree.clazz);
result = tree;
}
public void visitIndexed(JCArrayAccess tree) {
tree.indexed = translate(tree.indexed);
tree.index = translate(tree.index);
result = tree;
}
public void visitSelect(JCFieldAccess tree) {
tree.selected = translate(tree.selected);
result = tree;
}
public void visitIdent(JCIdent tree) {
result = tree;
}
public void visitLiteral(JCLiteral tree) {
result = tree;
}
public void visitTypeIdent(JCPrimitiveTypeTree tree) {
result = tree;
}
public void visitTypeArray(JCArrayTypeTree tree) {
tree.elemtype = translate(tree.elemtype);
result = tree;
}
public void visitTypeApply(JCTypeApply tree) {
tree.clazz = translate(tree.clazz);
tree.arguments = translate(tree.arguments);
result = tree;
}
public void visitTypeDisjoint(JCTypeDisjoint tree) {
tree.components = translate(tree.components);
result = tree;
}
public void visitTypeParameter(JCTypeParameter tree) {
tree.annotations = translate(tree.annotations);
tree.bounds = translate(tree.bounds);
result = tree;
}
@Override
public void visitWildcard(JCWildcard tree) {
tree.kind = translate(tree.kind);
tree.inner = translate(tree.inner);
result = tree;
}
@Override
public void visitTypeBoundKind(TypeBoundKind tree) {
result = tree;
}
public void visitErroneous(JCErroneous tree) {
result = tree;
}
public void visitLetExpr(LetExpr tree) {
tree.defs = translateVarDefs(tree.defs);
tree.expr = translate(tree.expr);
result = tree;
}
public void visitModifiers(JCModifiers tree) {
tree.annotations = translateAnnotations(tree.annotations);
result = tree;
}
public void visitAnnotation(JCAnnotation tree) {
tree.annotationType = translate(tree.annotationType);
tree.args = translate(tree.args);
result = tree;
}
public void visitAnnotatedType(JCAnnotatedType tree) {
tree.annotations = translate(tree.annotations);
tree.underlyingType = translate(tree.underlyingType);
result = tree;
}
public void visitTree(JCTree tree) {
throw new AssertionError(tree);
}
}