lombok.delombok.PrettyCommentsPrinter Maven / Gradle / Ivy
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/*
* Copyright 1999-2006 Sun Microsystems, Inc. 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package lombok.delombok;
import static com.sun.tools.javac.code.Flags.ANNOTATION;
import static com.sun.tools.javac.code.Flags.ENUM;
import static com.sun.tools.javac.code.Flags.INTERFACE;
import static com.sun.tools.javac.code.Flags.SYNTHETIC;
import static com.sun.tools.javac.code.Flags.StandardFlags;
import static com.sun.tools.javac.code.Flags.VARARGS;
import java.io.IOException;
import java.io.Writer;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import lombok.javac.Comment;
import lombok.javac.Javac;
import lombok.javac.Comment.EndConnection;
import lombok.javac.Comment.StartConnection;
import com.sun.source.tree.Tree;
import com.sun.tools.javac.code.BoundKind;
import com.sun.tools.javac.code.Flags;
import com.sun.tools.javac.code.Symbol;
import com.sun.tools.javac.code.TypeTags;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.TreeInfo;
import com.sun.tools.javac.tree.TreeScanner;
import com.sun.tools.javac.tree.JCTree.JCAnnotation;
import com.sun.tools.javac.tree.JCTree.JCArrayAccess;
import com.sun.tools.javac.tree.JCTree.JCArrayTypeTree;
import com.sun.tools.javac.tree.JCTree.JCAssert;
import com.sun.tools.javac.tree.JCTree.JCAssign;
import com.sun.tools.javac.tree.JCTree.JCAssignOp;
import com.sun.tools.javac.tree.JCTree.JCBinary;
import com.sun.tools.javac.tree.JCTree.JCBlock;
import com.sun.tools.javac.tree.JCTree.JCBreak;
import com.sun.tools.javac.tree.JCTree.JCCase;
import com.sun.tools.javac.tree.JCTree.JCCatch;
import com.sun.tools.javac.tree.JCTree.JCClassDecl;
import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
import com.sun.tools.javac.tree.JCTree.JCConditional;
import com.sun.tools.javac.tree.JCTree.JCContinue;
import com.sun.tools.javac.tree.JCTree.JCDoWhileLoop;
import com.sun.tools.javac.tree.JCTree.JCEnhancedForLoop;
import com.sun.tools.javac.tree.JCTree.JCErroneous;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import com.sun.tools.javac.tree.JCTree.JCExpressionStatement;
import com.sun.tools.javac.tree.JCTree.JCFieldAccess;
import com.sun.tools.javac.tree.JCTree.JCForLoop;
import com.sun.tools.javac.tree.JCTree.JCIdent;
import com.sun.tools.javac.tree.JCTree.JCIf;
import com.sun.tools.javac.tree.JCTree.JCImport;
import com.sun.tools.javac.tree.JCTree.JCInstanceOf;
import com.sun.tools.javac.tree.JCTree.JCLabeledStatement;
import com.sun.tools.javac.tree.JCTree.JCLiteral;
import com.sun.tools.javac.tree.JCTree.JCMethodDecl;
import com.sun.tools.javac.tree.JCTree.JCMethodInvocation;
import com.sun.tools.javac.tree.JCTree.JCModifiers;
import com.sun.tools.javac.tree.JCTree.JCNewArray;
import com.sun.tools.javac.tree.JCTree.JCNewClass;
import com.sun.tools.javac.tree.JCTree.JCParens;
import com.sun.tools.javac.tree.JCTree.JCPrimitiveTypeTree;
import com.sun.tools.javac.tree.JCTree.JCReturn;
import com.sun.tools.javac.tree.JCTree.JCSkip;
import com.sun.tools.javac.tree.JCTree.JCStatement;
import com.sun.tools.javac.tree.JCTree.JCSwitch;
import com.sun.tools.javac.tree.JCTree.JCSynchronized;
import com.sun.tools.javac.tree.JCTree.JCThrow;
import com.sun.tools.javac.tree.JCTree.JCTry;
import com.sun.tools.javac.tree.JCTree.JCTypeApply;
import com.sun.tools.javac.tree.JCTree.JCTypeCast;
import com.sun.tools.javac.tree.JCTree.JCTypeParameter;
import com.sun.tools.javac.tree.JCTree.JCUnary;
import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
import com.sun.tools.javac.tree.JCTree.JCWhileLoop;
import com.sun.tools.javac.tree.JCTree.JCWildcard;
import com.sun.tools.javac.tree.JCTree.LetExpr;
import com.sun.tools.javac.tree.JCTree.TypeBoundKind;
import com.sun.tools.javac.util.Convert;
import com.sun.tools.javac.util.List;
import com.sun.tools.javac.util.Name;
import com.sun.tools.javac.util.Position;
/** Prints out a tree as an indented Java source program.
*
* This is NOT part of any API supported by Sun Microsystems. 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.
*/
@SuppressWarnings("all") // Mainly sun code that has other warning settings
public class PrettyCommentsPrinter extends JCTree.Visitor {
private static final Method GET_TAG_METHOD;
private static final Field TAG_FIELD;
private static final int PARENS = Javac.getCtcInt(JCTree.class, "PARENS");
private static final int IMPORT = Javac.getCtcInt(JCTree.class, "IMPORT");
private static final int VARDEF = Javac.getCtcInt(JCTree.class, "VARDEF");
private static final int SELECT = Javac.getCtcInt(JCTree.class, "SELECT");
private static final Map OPERATORS;
static {
Method m = null;
Field f = null;
try {
m = JCTree.class.getDeclaredMethod("getTag");
}
catch (NoSuchMethodException e) {
try {
f = JCTree.class.getDeclaredField("tag");
}
catch (NoSuchFieldException e1) {
e1.printStackTrace();
}
}
GET_TAG_METHOD = m;
TAG_FIELD = f;
Map map = new HashMap();
map.put(Javac.getCtcInt(JCTree.class, "POS"), "+");
map.put(Javac.getCtcInt(JCTree.class, "NEG"), "-");
map.put(Javac.getCtcInt(JCTree.class, "NOT"), "!");
map.put(Javac.getCtcInt(JCTree.class, "COMPL"), "~");
map.put(Javac.getCtcInt(JCTree.class, "PREINC"), "++");
map.put(Javac.getCtcInt(JCTree.class, "PREDEC"), "--");
map.put(Javac.getCtcInt(JCTree.class, "POSTINC"), "++");
map.put(Javac.getCtcInt(JCTree.class, "POSTDEC"), "--");
map.put(Javac.getCtcInt(JCTree.class, "NULLCHK"), "<*nullchk*>");
map.put(Javac.getCtcInt(JCTree.class, "OR"), "||");
map.put(Javac.getCtcInt(JCTree.class, "AND"), "&&");
map.put(Javac.getCtcInt(JCTree.class, "EQ"), "==");
map.put(Javac.getCtcInt(JCTree.class, "NE"), "!=");
map.put(Javac.getCtcInt(JCTree.class, "LT"), "<");
map.put(Javac.getCtcInt(JCTree.class, "GT"), ">");
map.put(Javac.getCtcInt(JCTree.class, "LE"), "<=");
map.put(Javac.getCtcInt(JCTree.class, "GE"), ">=");
map.put(Javac.getCtcInt(JCTree.class, "BITOR"), "|");
map.put(Javac.getCtcInt(JCTree.class, "BITXOR"), "^");
map.put(Javac.getCtcInt(JCTree.class, "BITAND"), "&");
map.put(Javac.getCtcInt(JCTree.class, "SL"), "<<");
map.put(Javac.getCtcInt(JCTree.class, "SR"), ">>");
map.put(Javac.getCtcInt(JCTree.class, "USR"), ">>>");
map.put(Javac.getCtcInt(JCTree.class, "PLUS"), "+");
map.put(Javac.getCtcInt(JCTree.class, "MINUS"), "-");
map.put(Javac.getCtcInt(JCTree.class, "MUL"), "*");
map.put(Javac.getCtcInt(JCTree.class, "DIV"), "/");
map.put(Javac.getCtcInt(JCTree.class, "MOD"), "%");
OPERATORS = map;
}
static int getTag(JCTree tree) {
if (GET_TAG_METHOD != null) {
try {
return (Integer)GET_TAG_METHOD.invoke(tree);
}
catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
catch (InvocationTargetException e) {
throw new RuntimeException(e.getCause());
}
}
try {
return TAG_FIELD.getInt(tree);
}
catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
private List comments;
private final JCCompilationUnit cu;
private boolean onNewLine = true;
private boolean aligned = false;
private boolean inParams = false;
private boolean needsSpace = false;
private boolean needsNewLine = false;
private boolean needsAlign = false;
public PrettyCommentsPrinter(Writer out, JCCompilationUnit cu, List comments) {
this.out = out;
this.comments = comments;
this.cu = cu;
}
private int endPos(JCTree tree) {
return tree.getEndPosition(cu.endPositions);
}
private void consumeComments(int till) throws IOException {
boolean prevNewLine = onNewLine;
boolean found = false;
Comment head = comments.head;
while (comments.nonEmpty() && head.pos < till) {
printComment(head);
comments = comments.tail;
head = comments.head;
}
if (!onNewLine && prevNewLine) {
println();
}
}
private void consumeTrailingComments(int from) throws IOException {
boolean prevNewLine = onNewLine;
Comment head = comments.head;
boolean stop = false;
while (comments.nonEmpty() && head.prevEndPos == from && !stop && !(head.start == StartConnection.ON_NEXT_LINE || head.start == StartConnection.START_OF_LINE)) {
from = head.endPos;
printComment(head);
stop = (head.end == EndConnection.ON_NEXT_LINE);
comments = comments.tail;
head = comments.head;
}
if (!onNewLine && prevNewLine) {
println();
}
}
private void printComment(Comment comment) throws IOException {
prepareComment(comment.start);
print(comment.content);
switch (comment.end) {
case ON_NEXT_LINE:
if (!aligned) {
needsNewLine = true;
needsAlign = true;
}
break;
case AFTER_COMMENT:
needsSpace = true;
break;
case DIRECT_AFTER_COMMENT:
// do nothing
break;
}
}
private void prepareComment(StartConnection start) throws IOException {
switch (start) {
case DIRECT_AFTER_PREVIOUS:
needsSpace = false;
break;
case AFTER_PREVIOUS:
needsSpace = true;
break;
case START_OF_LINE:
needsNewLine = true;
needsAlign = false;
break;
case ON_NEXT_LINE:
if (!aligned) {
needsNewLine = true;
needsAlign = true;
}
break;
}
}
/** The output stream on which trees are printed.
*/
Writer out;
/** The current left margin.
*/
int lmargin = 0;
/** The enclosing class name.
*/
Name enclClassName;
/** A hashtable mapping trees to their documentation comments
* (can be null)
*/
Map docComments = null;
/** Align code to be indented to left margin.
*/
void align() throws IOException {
onNewLine = false;
aligned = true;
needsAlign = false;
for (int i = 0; i < lmargin; i++) out.write("\t");
}
/** Increase left margin by indentation width.
*/
void indent() {
lmargin++;
}
/** Decrease left margin by indentation width.
*/
void undent() {
lmargin--;
}
/** Enter a new precedence level. Emit a `(' if new precedence level
* is less than precedence level so far.
* @param contextPrec The precedence level in force so far.
* @param ownPrec The new precedence level.
*/
void open(int contextPrec, int ownPrec) throws IOException {
if (ownPrec < contextPrec) out.write("(");
}
/** Leave precedence level. Emit a `(' if inner precedence level
* is less than precedence level we revert to.
* @param contextPrec The precedence level we revert to.
* @param ownPrec The inner precedence level.
*/
void close(int contextPrec, int ownPrec) throws IOException {
if (ownPrec < contextPrec) out.write(")");
}
/** Print string, replacing all non-ascii character with unicode escapes.
*/
public void print(Object s) throws IOException {
boolean align = needsAlign;
if (needsNewLine && !onNewLine) {
println();
}
if (align && !aligned) {
align();
}
if (needsSpace && !onNewLine && !aligned) {
out.write(' ');
}
needsSpace = false;
out.write(Convert.escapeUnicode(s.toString()));
onNewLine = false;
aligned = false;
}
/** Print new line.
*/
public void println() throws IOException {
onNewLine = true;
aligned = false;
needsNewLine = false;
out.write(lineSep);
}
String lineSep = System.getProperty("line.separator");
/**************************************************************************
* Traversal methods
*************************************************************************/
/** Exception to propagate IOException through visitXXX methods */
private static class UncheckedIOException extends Error {
static final long serialVersionUID = -4032692679158424751L;
UncheckedIOException(IOException e) {
super(e.getMessage(), e);
}
}
/** Visitor argument: the current precedence level.
*/
int prec;
/** Visitor method: print expression tree.
* @param prec The current precedence level.
*/
public void printExpr(JCTree tree, int prec) throws IOException {
int prevPrec = this.prec;
try {
this.prec = prec;
if (tree == null) print("/*missing*/");
else {
consumeComments(tree.pos);
tree.accept(this);
int endPos = endPos(tree);
consumeTrailingComments(endPos);
}
} catch (UncheckedIOException ex) {
IOException e = new IOException(ex.getMessage());
e.initCause(ex);
throw e;
} finally {
this.prec = prevPrec;
}
}
/** Derived visitor method: print expression tree at minimum precedence level
* for expression.
*/
public void printExpr(JCTree tree) throws IOException {
printExpr(tree, TreeInfo.noPrec);
}
/** Derived visitor method: print statement tree.
*/
public void printStat(JCTree tree) throws IOException {
if (isEmptyStat(tree)) {
printEmptyStat();
} else {
printExpr(tree, TreeInfo.notExpression);
}
}
public void printEmptyStat() throws IOException {
print(";");
}
public boolean isEmptyStat(JCTree tree) {
if (!(tree instanceof JCBlock)) return false;
JCBlock block = (JCBlock) tree;
return (Position.NOPOS == block.pos) && block.stats.isEmpty();
}
/** Derived visitor method: print list of expression trees, separated by given string.
* @param sep the separator string
*/
public void printExprs(List trees, String sep) throws IOException {
if (trees.nonEmpty()) {
printExpr(trees.head);
for (List l = trees.tail; l.nonEmpty(); l = l.tail) {
print(sep);
printExpr(l.head);
}
}
}
/** Derived visitor method: print list of expression trees, separated by commas.
*/
public void printExprs(List trees) throws IOException {
printExprs(trees, ", ");
}
/** Derived visitor method: print list of statements, each on a separate line.
*/
public void printStats(List trees) throws IOException {
for (List l = trees; l.nonEmpty(); l = l.tail) {
align();
printStat(l.head);
println();
}
}
/** Print a set of modifiers.
*/
public void printFlags(long flags) throws IOException {
if ((flags & SYNTHETIC) != 0) print("/*synthetic*/ ");
print(TreeInfo.flagNames(flags));
if ((flags & StandardFlags) != 0) print(" ");
if ((flags & ANNOTATION) != 0) print("@");
}
public void printAnnotations(List trees) throws IOException {
for (List l = trees; l.nonEmpty(); l = l.tail) {
printStat(l.head);
if (inParams) {
print(" ");
}
else {
println();
align();
}
}
}
/** Print documentation comment, if it exists
* @param tree The tree for which a documentation comment should be printed.
*/
public void printDocComment(JCTree tree) throws IOException {
if (docComments != null) {
String dc = docComments.get(tree);
if (dc != null) {
print("/**"); println();
int pos = 0;
int endpos = lineEndPos(dc, pos);
while (pos < dc.length()) {
align();
print(" *");
if (pos < dc.length() && dc.charAt(pos) > ' ') print(" ");
print(dc.substring(pos, endpos)); println();
pos = endpos + 1;
endpos = lineEndPos(dc, pos);
}
align(); print(" */"); println();
align();
}
}
}
//where
static int lineEndPos(String s, int start) {
int pos = s.indexOf('\n', start);
if (pos < 0) pos = s.length();
return pos;
}
/** If type parameter list is non-empty, print it enclosed in "<...>" brackets.
*/
public void printTypeParameters(List trees) throws IOException {
if (trees.nonEmpty()) {
print("<");
printExprs(trees);
print(">");
}
}
/** Print a block.
*/
public void printBlock(List stats, JCTree container) throws IOException {
print("{");
println();
indent();
printStats(stats);
consumeComments(endPos(container));
undent();
align();
print("}");
}
/** Print a block.
*/
public void printEnumBody(List stats) throws IOException {
print("{");
println();
indent();
boolean first = true;
for (List l = stats; l.nonEmpty(); l = l.tail) {
if (isEnumerator(l.head)) {
if (!first) {
print(",");
println();
}
align();
printStat(l.head);
first = false;
}
}
print(";");
println();
for (List l = stats; l.nonEmpty(); l = l.tail) {
if (!isEnumerator(l.head)) {
align();
printStat(l.head);
println();
}
}
undent();
align();
print("}");
}
public void printEnumMember(JCVariableDecl tree) throws IOException {
printAnnotations(tree.mods.annotations);
print(tree.name);
if (tree.init instanceof JCNewClass) {
JCNewClass constructor = (JCNewClass) tree.init;
if (constructor.args != null && constructor.args.nonEmpty()) {
print("(");
printExprs(constructor.args);
print(")");
}
if (constructor.def != null && constructor.def.defs != null) {
print(" ");
printBlock(constructor.def.defs, constructor.def);
}
}
}
/** Is the given tree an enumerator definition? */
boolean isEnumerator(JCTree t) {
return getTag(t) == VARDEF && (((JCVariableDecl) t).mods.flags & ENUM) != 0;
}
/** Print unit consisting of package clause and import statements in toplevel,
* followed by class definition. if class definition == null,
* print all definitions in toplevel.
* @param tree The toplevel tree
* @param cdef The class definition, which is assumed to be part of the
* toplevel tree.
*/
public void printUnit(JCCompilationUnit tree, JCClassDecl cdef) throws IOException {
docComments = tree.docComments;
printDocComment(tree);
if (tree.pid != null) {
consumeComments(tree.pos);
print("package ");
printExpr(tree.pid);
print(";");
println();
}
boolean firstImport = true;
for (List l = tree.defs;
l.nonEmpty() && (cdef == null || getTag(l.head) == IMPORT);
l = l.tail) {
if (getTag(l.head) == IMPORT) {
JCImport imp = (JCImport)l.head;
Name name = TreeInfo.name(imp.qualid);
if (name == name.table.fromChars(new char[] {'*'}, 0, 1) ||
cdef == null ||
isUsed(TreeInfo.symbol(imp.qualid), cdef)) {
if (firstImport) {
firstImport = false;
println();
}
printStat(imp);
}
} else {
printStat(l.head);
}
}
if (cdef != null) {
printStat(cdef);
println();
}
}
// where
boolean isUsed(final Symbol t, JCTree cdef) {
class UsedVisitor extends TreeScanner {
public void scan(JCTree tree) {
if (tree!=null && !result) tree.accept(this);
}
boolean result = false;
public void visitIdent(JCIdent tree) {
if (tree.sym == t) result = true;
}
}
UsedVisitor v = new UsedVisitor();
v.scan(cdef);
return v.result;
}
/**************************************************************************
* Visitor methods
*************************************************************************/
public void visitTopLevel(JCCompilationUnit tree) {
try {
printUnit(tree, null);
consumeComments(Integer.MAX_VALUE);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitImport(JCImport tree) {
try {
print("import ");
if (tree.staticImport) print("static ");
printExpr(tree.qualid);
print(";");
println();
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitClassDef(JCClassDecl tree) {
try {
consumeComments(tree.pos);
println(); align();
printDocComment(tree);
printAnnotations(tree.mods.annotations);
printFlags(tree.mods.flags & ~INTERFACE);
Name enclClassNamePrev = enclClassName;
enclClassName = tree.name;
if ((tree.mods.flags & INTERFACE) != 0) {
print("interface " + tree.name);
printTypeParameters(tree.typarams);
if (tree.implementing.nonEmpty()) {
print(" extends ");
printExprs(tree.implementing);
}
} else {
if ((tree.mods.flags & ENUM) != 0)
print("enum " + tree.name);
else
print("class " + tree.name);
printTypeParameters(tree.typarams);
if (tree.getExtendsClause() != null) {
print(" extends ");
printExpr(tree.getExtendsClause());
}
if (tree.implementing.nonEmpty()) {
print(" implements ");
printExprs(tree.implementing);
}
}
print(" ");
//
if ((tree.mods.flags & INTERFACE) != 0) {
removeImplicitModifiersForInterfaceMembers(tree.defs);
}
//
if ((tree.mods.flags & ENUM) != 0) {
printEnumBody(tree.defs);
} else {
printBlock(tree.defs, tree);
}
enclClassName = enclClassNamePrev;
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
// Added for delombok by Reinier Zwitserloot
private void removeImplicitModifiersForInterfaceMembers(List defs) {
for (JCTree def :defs) {
if (def instanceof JCVariableDecl) {
((JCVariableDecl) def).mods.flags &= ~(Flags.PUBLIC | Flags.STATIC | Flags.FINAL);
}
if (def instanceof JCMethodDecl) {
((JCMethodDecl) def).mods.flags &= ~(Flags.PUBLIC | Flags.ABSTRACT);
}
if (def instanceof JCClassDecl) {
((JCClassDecl) def).mods.flags &= ~(Flags.PUBLIC | Flags.STATIC);
}
}
}
public void visitMethodDef(JCMethodDecl tree) {
try {
boolean isConstructor = tree.name == tree.name.table.fromChars("".toCharArray(), 0, 6);
// when producing source output, omit anonymous constructors
if (isConstructor && enclClassName == null) return;
boolean isGeneratedConstructor = isConstructor && ((tree.mods.flags & Flags.GENERATEDCONSTR) != 0);
if (isGeneratedConstructor) return;
println(); align();
printDocComment(tree);
printExpr(tree.mods);
printTypeParameters(tree.typarams);
if (tree.name == tree.name.table.fromChars("".toCharArray(), 0, 6)) {
print(enclClassName != null ? enclClassName : tree.name);
} else {
printExpr(tree.restype);
print(" " + tree.name);
}
print("(");
inParams = true;
printExprs(tree.params);
inParams = false;
print(")");
if (tree.thrown.nonEmpty()) {
print(" throws ");
printExprs(tree.thrown);
}
if (tree.body != null) {
print(" ");
printBlock(tree.body.stats, tree.body);
} else {
print(";");
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitVarDef(JCVariableDecl tree) {
try {
if (docComments != null && docComments.get(tree) != null) {
println(); align();
}
printDocComment(tree);
if ((tree.mods.flags & ENUM) != 0) {
printEnumMember(tree);
} else {
printExpr(tree.mods);
if ((tree.mods.flags & VARARGS) != 0) {
printExpr(((JCArrayTypeTree) tree.vartype).elemtype);
print("... " + tree.name);
} else {
printExpr(tree.vartype);
print(" " + tree.name);
}
if (tree.init != null) {
print(" = ");
printExpr(tree.init);
}
if (prec == TreeInfo.notExpression) print(";");
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitSkip(JCSkip tree) {
try {
print(";");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitBlock(JCBlock tree) {
try {
consumeComments(tree.pos);
printFlags(tree.flags);
printBlock(tree.stats, tree);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitDoLoop(JCDoWhileLoop tree) {
try {
print("do ");
printStat(tree.body);
align();
print(" while ");
if (getTag(tree.cond) == PARENS) {
printExpr(tree.cond);
} else {
print("(");
printExpr(tree.cond);
print(")");
}
print(";");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitWhileLoop(JCWhileLoop tree) {
try {
print("while ");
if (getTag(tree.cond) == PARENS) {
printExpr(tree.cond);
} else {
print("(");
printExpr(tree.cond);
print(")");
}
print(" ");
printStat(tree.body);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitForLoop(JCForLoop tree) {
try {
print("for (");
if (tree.init.nonEmpty()) {
if (getTag(tree.init.head) == VARDEF) {
printExpr(tree.init.head);
for (List l = tree.init.tail; l.nonEmpty(); l = l.tail) {
JCVariableDecl vdef = (JCVariableDecl)l.head;
print(", " + vdef.name + " = ");
printExpr(vdef.init);
}
} else {
printExprs(tree.init);
}
}
print("; ");
if (tree.cond != null) printExpr(tree.cond);
print("; ");
printExprs(tree.step);
print(") ");
printStat(tree.body);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitForeachLoop(JCEnhancedForLoop tree) {
try {
print("for (");
printExpr(tree.var);
print(" : ");
printExpr(tree.expr);
print(") ");
printStat(tree.body);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitLabelled(JCLabeledStatement tree) {
try {
print(tree.label + ": ");
printStat(tree.body);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitSwitch(JCSwitch tree) {
try {
print("switch ");
if (getTag(tree.selector) == PARENS) {
printExpr(tree.selector);
} else {
print("(");
printExpr(tree.selector);
print(")");
}
print(" {");
println();
printStats(tree.cases);
align();
print("}");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitCase(JCCase tree) {
try {
if (tree.pat == null) {
print("default");
} else {
print("case ");
printExpr(tree.pat);
}
print(": ");
println();
indent();
printStats(tree.stats);
undent();
align();
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitSynchronized(JCSynchronized tree) {
try {
print("synchronized ");
if (getTag(tree.lock) == PARENS) {
printExpr(tree.lock);
} else {
print("(");
printExpr(tree.lock);
print(")");
}
print(" ");
printStat(tree.body);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitTry(JCTry tree) {
try {
print("try ");
printStat(tree.body);
for (List l = tree.catchers; l.nonEmpty(); l = l.tail) {
printStat(l.head);
}
if (tree.finalizer != null) {
print(" finally ");
printStat(tree.finalizer);
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitCatch(JCCatch tree) {
try {
print(" catch (");
printExpr(tree.param);
print(") ");
printStat(tree.body);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitConditional(JCConditional tree) {
try {
open(prec, TreeInfo.condPrec);
printExpr(tree.cond, TreeInfo.condPrec);
print(" ? ");
printExpr(tree.truepart, TreeInfo.condPrec);
print(" : ");
printExpr(tree.falsepart, TreeInfo.condPrec);
close(prec, TreeInfo.condPrec);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitIf(JCIf tree) {
try {
print("if ");
if (getTag(tree.cond) == PARENS) {
printExpr(tree.cond);
} else {
print("(");
printExpr(tree.cond);
print(")");
}
print(" ");
printStat(tree.thenpart);
if (tree.elsepart != null) {
print(" else ");
printStat(tree.elsepart);
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitExec(JCExpressionStatement tree) {
try {
printExpr(tree.expr);
if (prec == TreeInfo.notExpression) print(";");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitBreak(JCBreak tree) {
try {
print("break");
if (tree.label != null) print(" " + tree.label);
print(";");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitContinue(JCContinue tree) {
try {
print("continue");
if (tree.label != null) print(" " + tree.label);
print(";");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitReturn(JCReturn tree) {
try {
print("return");
if (tree.expr != null) {
print(" ");
printExpr(tree.expr);
}
print(";");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitThrow(JCThrow tree) {
try {
print("throw ");
printExpr(tree.expr);
print(";");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitAssert(JCAssert tree) {
try {
print("assert ");
printExpr(tree.cond);
if (tree.detail != null) {
print(" : ");
printExpr(tree.detail);
}
print(";");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitApply(JCMethodInvocation tree) {
try {
if (!tree.typeargs.isEmpty()) {
if (getTag(tree.meth) == SELECT) {
JCFieldAccess left = (JCFieldAccess)tree.meth;
printExpr(left.selected);
print(".<");
printExprs(tree.typeargs);
print(">" + left.name);
} else {
print("<");
printExprs(tree.typeargs);
print(">");
printExpr(tree.meth);
}
} else {
printExpr(tree.meth);
}
print("(");
printExprs(tree.args);
print(")");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitNewClass(JCNewClass tree) {
try {
if (tree.encl != null) {
printExpr(tree.encl);
print(".");
}
print("new ");
if (!tree.typeargs.isEmpty()) {
print("<");
printExprs(tree.typeargs);
print(">");
}
printExpr(tree.clazz);
print("(");
printExprs(tree.args);
print(")");
if (tree.def != null) {
Name enclClassNamePrev = enclClassName;
enclClassName =
tree.def.name != null ? tree.def.name :
tree.type != null && tree.type.tsym.name != tree.type.tsym.name.table.fromChars(new char[0], 0, 0) ? tree.type.tsym.name :
null;
if ((tree.def.mods.flags & Flags.ENUM) != 0) print("/*enum*/");
printBlock(tree.def.defs, tree.def);
enclClassName = enclClassNamePrev;
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitNewArray(JCNewArray tree) {
try {
if (tree.elemtype != null) {
print("new ");
JCTree elem = tree.elemtype;
if (elem instanceof JCArrayTypeTree)
printBaseElementType((JCArrayTypeTree) elem);
else
printExpr(elem);
for (List l = tree.dims; l.nonEmpty(); l = l.tail) {
print("[");
printExpr(l.head);
print("]");
}
if (elem instanceof JCArrayTypeTree)
printBrackets((JCArrayTypeTree) elem);
}
if (tree.elems != null) {
if (tree.elemtype != null) print("[]");
print("{");
printExprs(tree.elems);
print("}");
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitParens(JCParens tree) {
try {
print("(");
printExpr(tree.expr);
print(")");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitAssign(JCAssign tree) {
try {
open(prec, TreeInfo.assignPrec);
printExpr(tree.lhs, TreeInfo.assignPrec + 1);
print(" = ");
printExpr(tree.rhs, TreeInfo.assignPrec);
close(prec, TreeInfo.assignPrec);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public String operatorName(int tag) {
String result = OPERATORS.get(tag);
if (result == null) throw new Error();
return result;
}
public void visitAssignop(JCAssignOp tree) {
try {
open(prec, TreeInfo.assignopPrec);
printExpr(tree.lhs, TreeInfo.assignopPrec + 1);
print(" " + operatorName(getTag(tree) - JCTree.ASGOffset) + "= ");
printExpr(tree.rhs, TreeInfo.assignopPrec);
close(prec, TreeInfo.assignopPrec);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitUnary(JCUnary tree) {
try {
int ownprec = TreeInfo.opPrec(getTag(tree));
String opname = operatorName(getTag(tree));
open(prec, ownprec);
if (getTag(tree) <= JCTree.PREDEC) {
print(opname);
printExpr(tree.arg, ownprec);
} else {
printExpr(tree.arg, ownprec);
print(opname);
}
close(prec, ownprec);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitBinary(JCBinary tree) {
try {
int ownprec = TreeInfo.opPrec(getTag(tree));
String opname = operatorName(getTag(tree));
open(prec, ownprec);
printExpr(tree.lhs, ownprec);
print(" " + opname + " ");
printExpr(tree.rhs, ownprec + 1);
close(prec, ownprec);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitTypeCast(JCTypeCast tree) {
try {
open(prec, TreeInfo.prefixPrec);
print("(");
printExpr(tree.clazz);
print(")");
printExpr(tree.expr, TreeInfo.prefixPrec);
close(prec, TreeInfo.prefixPrec);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitTypeTest(JCInstanceOf tree) {
try {
open(prec, TreeInfo.ordPrec);
printExpr(tree.expr, TreeInfo.ordPrec);
print(" instanceof ");
printExpr(tree.clazz, TreeInfo.ordPrec + 1);
close(prec, TreeInfo.ordPrec);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitIndexed(JCArrayAccess tree) {
try {
printExpr(tree.indexed, TreeInfo.postfixPrec);
print("[");
printExpr(tree.index);
print("]");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitSelect(JCFieldAccess tree) {
try {
printExpr(tree.selected, TreeInfo.postfixPrec);
print("." + tree.name);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitIdent(JCIdent tree) {
try {
print(tree.name);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitLiteral(JCLiteral tree) {
try {
switch (tree.typetag) {
case TypeTags.INT:
print(tree.value.toString());
break;
case TypeTags.LONG:
print(tree.value + "L");
break;
case TypeTags.FLOAT:
print(tree.value + "F");
break;
case TypeTags.DOUBLE:
print(tree.value.toString());
break;
case TypeTags.CHAR:
print("\'" +
Convert.quote(
String.valueOf((char)((Number)tree.value).intValue())) +
"\'");
break;
case TypeTags.BOOLEAN:
print(((Number)tree.value).intValue() == 1 ? "true" : "false");
break;
case TypeTags.BOT:
print("null");
break;
default:
print("\"" + Convert.quote(tree.value.toString()) + "\"");
break;
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitTypeIdent(JCPrimitiveTypeTree tree) {
try {
switch(tree.typetag) {
case TypeTags.BYTE:
print("byte");
break;
case TypeTags.CHAR:
print("char");
break;
case TypeTags.SHORT:
print("short");
break;
case TypeTags.INT:
print("int");
break;
case TypeTags.LONG:
print("long");
break;
case TypeTags.FLOAT:
print("float");
break;
case TypeTags.DOUBLE:
print("double");
break;
case TypeTags.BOOLEAN:
print("boolean");
break;
case TypeTags.VOID:
print("void");
break;
default:
print("error");
break;
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitTypeArray(JCArrayTypeTree tree) {
try {
printBaseElementType(tree);
printBrackets(tree);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
// Prints the inner element type of a nested array
private void printBaseElementType(JCArrayTypeTree tree) throws IOException {
JCTree elem = tree.elemtype;
while (elem instanceof JCWildcard)
elem = ((JCWildcard) elem).inner;
if (elem instanceof JCArrayTypeTree)
printBaseElementType((JCArrayTypeTree) elem);
else
printExpr(elem);
}
// prints the brackets of a nested array in reverse order
private void printBrackets(JCArrayTypeTree tree) throws IOException {
JCTree elem;
while (true) {
elem = tree.elemtype;
print("[]");
if (!(elem instanceof JCArrayTypeTree)) break;
tree = (JCArrayTypeTree) elem;
}
}
public void visitTypeApply(JCTypeApply tree) {
try {
printExpr(tree.clazz);
print("<");
printExprs(tree.arguments);
print(">");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitTypeParameter(JCTypeParameter tree) {
try {
print(tree.name);
if (tree.bounds.nonEmpty()) {
print(" extends ");
printExprs(tree.bounds, " & ");
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
@Override
public void visitWildcard(JCWildcard tree) {
try {
Object kind = tree.getClass().getField("kind").get(tree);
print(kind);
if (kind != null && kind.getClass().getSimpleName().equals("TypeBoundKind")) {
kind = kind.getClass().getField("kind").get(kind);
}
if (tree.getKind() != Tree.Kind.UNBOUNDED_WILDCARD)
printExpr(tree.inner);
} catch (IOException e) {
throw new UncheckedIOException(e);
} catch (NoSuchFieldException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
public void visitTypeBoundKind(TypeBoundKind tree) {
try {
print(String.valueOf(tree.kind));
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitErroneous(JCErroneous tree) {
try {
print("(ERROR)");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitLetExpr(LetExpr tree) {
try {
print("(let " + tree.defs + " in " + tree.expr + ")");
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitModifiers(JCModifiers mods) {
try {
printAnnotations(mods.annotations);
printFlags(mods.flags);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitAnnotation(JCAnnotation tree) {
try {
print("@");
printExpr(tree.annotationType);
if (tree.args.nonEmpty()) {
print("(");
if (tree.args.length() == 1 && tree.args.get(0) instanceof JCAssign) {
JCExpression lhs = ((JCAssign)tree.args.get(0)).lhs;
if (lhs instanceof JCIdent && ((JCIdent)lhs).name.toString().equals("value")) tree.args = List.of(((JCAssign)tree.args.get(0)).rhs);
}
printExprs(tree.args);
print(")");
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public void visitTree(JCTree tree) {
try {
if ("JCTypeUnion".equals(tree.getClass().getSimpleName())) {
print(tree.toString());
return;
} else {
print("(UNKNOWN: " + tree + ")");
println();
}
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
}