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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v0.5
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v05.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  ******************************************************************************/
  11 package net.sourceforge.phpdt.internal.compiler.ast;
  12
  13 import net.sourceforge.phpdt.internal.compiler.ClassFile;
  14 import net.sourceforge.phpdt.internal.compiler.CompilationResult;
  15 import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
  16 import net.sourceforge.phpdt.internal.compiler.impl.ReferenceContext;
  17 import net.sourceforge.phpdt.internal.compiler.lookup.CompilationUnitScope;
  18 import net.sourceforge.phpdt.internal.compiler.lookup.ImportBinding;
  19 import net.sourceforge.phpdt.internal.compiler.lookup.LocalTypeBinding;
  20 import net.sourceforge.phpdt.internal.compiler.lookup.SourceTypeBinding;
  21 import net.sourceforge.phpdt.internal.compiler.problem.AbortCompilationUnit;
  22 import net.sourceforge.phpdt.internal.compiler.problem.AbortMethod;
  23 import net.sourceforge.phpdt.internal.compiler.problem.AbortType;
  24 import net.sourceforge.phpdt.internal.compiler.problem.ProblemReporter;
  25 import net.sourceforge.phpdt.internal.compiler.problem.ProblemSeverities;
  26 import net.sourceforge.phpdt.internal.compiler.util.CharOperation;
  27
  28 public class CompilationUnitDeclaration
  29         extends AstNode
  30         implements ProblemSeverities, ReferenceContext {
  31
  32         public ImportReference currentPackage;
  33         public ImportReference[] imports;
  34         public TypeDeclaration[] types;
  35         //public char[][] name;
  36
  37         public boolean ignoreFurtherInvestigation = false;      // once pointless to investigate due to errors
  38         public boolean ignoreMethodBodies = false;
  39         public CompilationUnitScope scope;
  40         public ProblemReporter problemReporter;
  41         public CompilationResult compilationResult;
  42
  43         private LocalTypeBinding[] allLocalTypes;
  44         public boolean isPropagatingInnerClassEmulation;
  45
  46         public CompilationUnitDeclaration(
  47                 ProblemReporter problemReporter,
  48                 CompilationResult compilationResult,
  49                 int sourceLength) {
  50
  51                 this.problemReporter = problemReporter;
  52                 this.compilationResult = compilationResult;
  53
  54                 //by definition of a compilation unit....
  55                 sourceStart = 0;
  56                 sourceEnd = sourceLength - 1;
  57
  58         }
  59
  60         /*
  61          *      We cause the compilation task to abort to a given extent.
  62          */
  63         public void abort(int abortLevel) {
  64
  65                 switch (abortLevel) {
  66                         case AbortType :
  67                                 throw new AbortType(compilationResult);
  68                         case AbortMethod :
  69                                 throw new AbortMethod(compilationResult);
  70                         default :
  71                                 throw new AbortCompilationUnit(compilationResult);
  72                 }
  73         }
  74
  75         /*
  76          * Dispatch code analysis AND request saturation of inner emulation
  77          */
  78         public void analyseCode() {
  79
  80                 if (ignoreFurtherInvestigation)
  81                         return;
  82                 try {
  83                         if (types != null) {
  84                                 for (int i = 0, count = types.length; i < count; i++) {
  85                                         types[i].analyseCode(scope);
  86                                 }
  87                         }
  88                         // request inner emulation propagation
  89                         propagateInnerEmulationForAllLocalTypes();
  90                 } catch (AbortCompilationUnit e) {
  91                         this.ignoreFurtherInvestigation = true;
  92                         return;
  93                 }
  94         }
  95
  96         /*
  97          * When unit result is about to be accepted, removed back pointers
  98          * to compiler structures.
  99          */
 100         public void cleanUp() {
 101
 102                 ClassFile[] classFiles = compilationResult.getClassFiles();
 103                 for (int i = 0, max = classFiles.length; i < max; i++) {
 104                         // clear the classFile back pointer to the bindings
 105                         ClassFile classFile = classFiles[i];
 106                         // null out the type's scope backpointers
 107                          ((SourceTypeBinding) classFile.referenceBinding).scope = null;
 108                         // null out the classfile backpointer to a type binding
 109                         classFile.referenceBinding = null;
 110                         classFile.codeStream = null; // codeStream holds onto ast and scopes
 111                         classFile.innerClassesBindings = null;
 112                 }
 113         }
 114
 115         public void checkUnusedImports(){
 116
 117                 if (this.scope.imports != null){
 118                         for (int i = 0, max = this.scope.imports.length; i < max; i++){
 119                                 ImportBinding importBinding = this.scope.imports[i];
 120                                 ImportReference importReference = importBinding.reference;
 121                                 if (importReference != null && !importReference.used){
 122                                         scope.problemReporter().unusedImport(importReference);
 123                                 }
 124                         }
 125                 }
 126         }
 127
 128         public CompilationResult compilationResult() {
 129                 return compilationResult;
 130         }
 131
 132         /*
 133          * Finds the matching type amoung this compilation unit types.
 134          * Returns null if no type with this name is found.
 135          * The type name is a compound name
 136          * eg. if we're looking for X.A.B then a type name would be {X, A, B}
 137          */
 138         public TypeDeclaration declarationOfType(char[][] typeName) {
 139
 140                 for (int i = 0; i < this.types.length; i++) {
 141                         TypeDeclaration typeDecl = this.types[i].declarationOfType(typeName);
 142                         if (typeDecl != null) {
 143                                 return typeDecl;
 144                         }
 145                 }
 146                 return null;
 147         }
 148
 149         /**
 150          * Bytecode generation
 151          */
 152         public void generateCode() {
 153
 154                 if (ignoreFurtherInvestigation) {
 155                         if (types != null) {
 156                                 for (int i = 0, count = types.length; i < count; i++) {
 157                                         types[i].ignoreFurtherInvestigation = true;
 158                                         // propagate the flag to request problem type creation
 159                                         types[i].generateCode(scope);
 160                                 }
 161                         }
 162                         return;
 163                 }
 164                 try {
 165                         if (types != null) {
 166                                 for (int i = 0, count = types.length; i < count; i++)
 167                                         types[i].generateCode(scope);
 168                         }
 169                 } catch (AbortCompilationUnit e) {
 170                 }
 171         }
 172
 173         public char[] getFileName() {
 174
 175                 return compilationResult.getFileName();
 176         }
 177
 178         public char[] getMainTypeName() {
 179
 180                 if (compilationResult.compilationUnit == null) {
 181                         char[] fileName = compilationResult.getFileName();
 182
 183                         int start = CharOperation.lastIndexOf('/', fileName) + 1;
 184                         if (start == 0 || start < CharOperation.lastIndexOf('\\', fileName))
 185                                 start = CharOperation.lastIndexOf('\\', fileName) + 1;
 186
 187                         int end = CharOperation.lastIndexOf('.', fileName);
 188                         if (end == -1)
 189                                 end = fileName.length;
 190
 191                         return CharOperation.subarray(fileName, start, end);
 192                 } else {
 193                         return compilationResult.compilationUnit.getMainTypeName();
 194                 }
 195         }
 196
 197         public boolean isEmpty() {
 198
 199                 return (currentPackage == null) && (imports == null) && (types == null);
 200         }
 201
 202         public boolean hasErrors() {
 203                 return this.ignoreFurtherInvestigation;
 204         }
 205
 206         /*
 207          * Force inner local types to update their innerclass emulation
 208          */
 209         public void propagateInnerEmulationForAllLocalTypes() {
 210
 211                 isPropagatingInnerClassEmulation = true;
 212                 if (allLocalTypes != null) {
 213                         for (int i = 0, max = allLocalTypes.length; i < max; i++) {
 214                                 allLocalTypes[i].updateInnerEmulationDependents();
 215                         }
 216                 }
 217         }
 218
 219         /*
 220          * Keep track of all local types, so as to update their innerclass
 221          * emulation later on.
 222          */
 223         public void record(LocalTypeBinding localType) {
 224
 225                 if (allLocalTypes == null) {
 226                         allLocalTypes = new LocalTypeBinding[] { localType };
 227                 } else {
 228                         int length = allLocalTypes.length;
 229                         System.arraycopy(
 230                                 allLocalTypes,
 231                                 0,
 232                                 (allLocalTypes = new LocalTypeBinding[length + 1]),
 233                                 0,
 234                                 length);
 235                         allLocalTypes[length] = localType;
 236                 }
 237         }
 238
 239         public void resolve() {
 240
 241                 try {
 242                         if (types != null) {
 243                                 for (int i = 0, count = types.length; i < count; i++) {
 244                                         types[i].resolve(scope);
 245                                 }
 246                         }
 247                         checkUnusedImports();
 248                 } catch (AbortCompilationUnit e) {
 249                         this.ignoreFurtherInvestigation = true;
 250                         return;
 251                 }
 252         }
 253
 254         public void tagAsHavingErrors() {
 255                 ignoreFurtherInvestigation = true;
 256         }
 257
 258         public String toString(int tab) {
 259
 260                 String s = ""; //$NON-NLS-1$
 261                 if (currentPackage != null)
 262                         s = tabString(tab) + "package " + currentPackage.toString(0, false) + ";\n"; //$NON-NLS-1$ //$NON-NLS-2$
 263
 264                 if (imports != null)
 265                         for (int i = 0; i < imports.length; i++) {
 266                                 s += tabString(tab) + "import " + imports[i].toString() + ";\n"; //$NON-NLS-1$ //$NON-NLS-2$
 267                         };
 268
 269                 if (types != null)
 270                         for (int i = 0; i < types.length; i++) {
 271                                 s += types[i].toString(tab) + "\n"; //$NON-NLS-1$
 272                         }
 273                 return s;
 274         }
 275
 276         public void traverse(
 277                 IAbstractSyntaxTreeVisitor visitor,
 278                 CompilationUnitScope scope) {
 279
 280                 if (ignoreFurtherInvestigation)
 281                         return;
 282                 try {
 283                         if (visitor.visit(this, scope)) {
 284                                 if (imports != null) {
 285                                         int importLength = imports.length;
 286                                         for (int i = 0; i < importLength; i++)
 287                                                 imports[i].traverse(visitor, scope);
 288                                 }
 289                                 if (types != null) {
 290                                         int typesLength = types.length;
 291                                         for (int i = 0; i < typesLength; i++)
 292                                                 types[i].traverse(visitor, scope);
 293                                 }
 294                         }
 295                         visitor.endVisit(this, scope);
 296                 } catch (AbortCompilationUnit e) {
 297                 }
 298         }
 299 }