Source Code Cross Referenced for AbstractMethodDeclaration.java in  » IDE-Eclipse » jdt » org » eclipse » jdt » internal » compiler » ast » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Eclipse » jdt » org.eclipse.jdt.internal.compiler.ast 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*******************************************************************************
002:         * Copyright (c) 2000, 2007 IBM Corporation and others.
003:         * All rights reserved. This program and the accompanying materials
004:         * are made available under the terms of the Eclipse Public License v1.0
005:         * which accompanies this distribution, and is available at
006:         * http://www.eclipse.org/legal/epl-v10.html
007:         *
008:         * Contributors:
009:         *     IBM Corporation - initial API and implementation
010:         *******************************************************************************/package org.eclipse.jdt.internal.compiler.ast;
011:
012:        import org.eclipse.jdt.core.compiler.*;
013:        import org.eclipse.jdt.internal.compiler.*;
014:        import org.eclipse.jdt.internal.compiler.flow.FlowInfo;
015:        import org.eclipse.jdt.internal.compiler.flow.InitializationFlowContext;
016:        import org.eclipse.jdt.internal.compiler.impl.*;
017:        import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
018:        import org.eclipse.jdt.internal.compiler.codegen.*;
019:        import org.eclipse.jdt.internal.compiler.lookup.*;
020:        import org.eclipse.jdt.internal.compiler.problem.*;
021:        import org.eclipse.jdt.internal.compiler.parser.*;
022:
023:        public abstract class AbstractMethodDeclaration extends ASTNode
024:                implements  ProblemSeverities, ReferenceContext {
025:
026:            public MethodScope scope;
027:            //it is not relevent for constructor but it helps to have the name of the constructor here 
028:            //which is always the name of the class.....parsing do extra work to fill it up while it do not have to....
029:            public char[] selector;
030:            public int declarationSourceStart;
031:            public int declarationSourceEnd;
032:            public int modifiers;
033:            public int modifiersSourceStart;
034:            public Annotation[] annotations;
035:            public Argument[] arguments;
036:            public TypeReference[] thrownExceptions;
037:            public Statement[] statements;
038:            public int explicitDeclarations;
039:            public MethodBinding binding;
040:            public boolean ignoreFurtherInvestigation = false;
041:
042:            public Javadoc javadoc;
043:
044:            public int bodyStart;
045:            public int bodyEnd = -1;
046:            public CompilationResult compilationResult;
047:
048:            AbstractMethodDeclaration(CompilationResult compilationResult) {
049:                this .compilationResult = compilationResult;
050:            }
051:
052:            /*
053:             *	We cause the compilation task to abort to a given extent.
054:             */
055:            public void abort(int abortLevel, CategorizedProblem problem) {
056:
057:                switch (abortLevel) {
058:                case AbortCompilation:
059:                    throw new AbortCompilation(this .compilationResult, problem);
060:                case AbortCompilationUnit:
061:                    throw new AbortCompilationUnit(this .compilationResult,
062:                            problem);
063:                case AbortType:
064:                    throw new AbortType(this .compilationResult, problem);
065:                default:
066:                    throw new AbortMethod(this .compilationResult, problem);
067:                }
068:            }
069:
070:            public abstract void analyseCode(ClassScope classScope,
071:                    InitializationFlowContext initializationContext,
072:                    FlowInfo info);
073:
074:            /**
075:             * Bind and add argument's binding into the scope of the method
076:             */
077:            public void bindArguments() {
078:
079:                if (this .arguments != null) {
080:                    // by default arguments in abstract/native methods are considered to be used (no complaint is expected)
081:                    if (this .binding == null) {
082:                        for (int i = 0, length = this .arguments.length; i < length; i++) {
083:                            this .arguments[i].bind(this .scope, null, true);
084:                        }
085:                        return;
086:                    }
087:                    boolean used = this .binding.isAbstract()
088:                            || this .binding.isNative();
089:                    AnnotationBinding[][] paramAnnotations = null;
090:                    for (int i = 0, length = this .arguments.length; i < length; i++) {
091:                        Argument argument = this .arguments[i];
092:                        argument.bind(this .scope, this .binding.parameters[i],
093:                                used);
094:                        if (argument.annotations != null) {
095:                            this .binding.tagBits |= TagBits.HasParameterAnnotations;
096:                            if (paramAnnotations == null)
097:                                paramAnnotations = new AnnotationBinding[length][];
098:                            paramAnnotations[i] = argument.binding
099:                                    .getAnnotations();
100:                        }
101:                    }
102:                    if (paramAnnotations != null)
103:                        this .binding.setParameterAnnotations(paramAnnotations);
104:                }
105:            }
106:
107:            /**
108:             * Record the thrown exception type bindings in the corresponding type references.
109:             */
110:            public void bindThrownExceptions() {
111:
112:                if (this .thrownExceptions != null && this .binding != null
113:                        && this .binding.thrownExceptions != null) {
114:                    int thrownExceptionLength = this .thrownExceptions.length;
115:                    int length = this .binding.thrownExceptions.length;
116:                    if (length == thrownExceptionLength) {
117:                        for (int i = 0; i < length; i++) {
118:                            this .thrownExceptions[i].resolvedType = this .binding.thrownExceptions[i];
119:                        }
120:                    } else {
121:                        int bindingIndex = 0;
122:                        for (int i = 0; i < thrownExceptionLength
123:                                && bindingIndex < length; i++) {
124:                            TypeReference thrownException = this .thrownExceptions[i];
125:                            ReferenceBinding thrownExceptionBinding = this .binding.thrownExceptions[bindingIndex];
126:                            char[][] bindingCompoundName = thrownExceptionBinding.compoundName;
127:                            if (bindingCompoundName == null)
128:                                continue; // skip problem case
129:                            if (thrownException instanceof  SingleTypeReference) {
130:                                // single type reference
131:                                int lengthName = bindingCompoundName.length;
132:                                char[] thrownExceptionTypeName = thrownException
133:                                        .getTypeName()[0];
134:                                if (CharOperation.equals(
135:                                        thrownExceptionTypeName,
136:                                        bindingCompoundName[lengthName - 1])) {
137:                                    thrownException.resolvedType = thrownExceptionBinding;
138:                                    bindingIndex++;
139:                                }
140:                            } else {
141:                                // qualified type reference
142:                                if (CharOperation.equals(thrownException
143:                                        .getTypeName(), bindingCompoundName)) {
144:                                    thrownException.resolvedType = thrownExceptionBinding;
145:                                    bindingIndex++;
146:                                }
147:                            }
148:                        }
149:                    }
150:                }
151:            }
152:
153:            public CompilationResult compilationResult() {
154:
155:                return this .compilationResult;
156:            }
157:
158:            /**
159:             * Bytecode generation for a method
160:             * @param classScope
161:             * @param classFile
162:             */
163:            public void generateCode(ClassScope classScope, ClassFile classFile) {
164:
165:                int problemResetPC = 0;
166:                classFile.codeStream.wideMode = false; // reset wideMode to false
167:                if (this .ignoreFurtherInvestigation) {
168:                    // method is known to have errors, dump a problem method
169:                    if (this .binding == null)
170:                        return; // handle methods with invalid signature or duplicates
171:                    int problemsLength;
172:                    CategorizedProblem[] problems = this .scope
173:                            .referenceCompilationUnit().compilationResult
174:                            .getProblems();
175:                    CategorizedProblem[] problemsCopy = new CategorizedProblem[problemsLength = problems.length];
176:                    System.arraycopy(problems, 0, problemsCopy, 0,
177:                            problemsLength);
178:                    classFile
179:                            .addProblemMethod(this , this .binding, problemsCopy);
180:                    return;
181:                }
182:                // regular code generation
183:                try {
184:                    problemResetPC = classFile.contentsOffset;
185:                    this .generateCode(classFile);
186:                } catch (AbortMethod e) {
187:                    // a fatal error was detected during code generation, need to restart code gen if possible
188:                    if (e.compilationResult == CodeStream.RESTART_IN_WIDE_MODE) {
189:                        // a branch target required a goto_w, restart code gen in wide mode.
190:                        try {
191:                            classFile.contentsOffset = problemResetPC;
192:                            classFile.methodCount--;
193:                            classFile.codeStream.wideMode = true; // request wide mode 
194:                            this .generateCode(classFile); // restart method generation
195:                        } catch (AbortMethod e2) {
196:                            int problemsLength;
197:                            CategorizedProblem[] problems = this .scope
198:                                    .referenceCompilationUnit().compilationResult
199:                                    .getAllProblems();
200:                            CategorizedProblem[] problemsCopy = new CategorizedProblem[problemsLength = problems.length];
201:                            System.arraycopy(problems, 0, problemsCopy, 0,
202:                                    problemsLength);
203:                            classFile.addProblemMethod(this , this .binding,
204:                                    problemsCopy, problemResetPC);
205:                        }
206:                    } else {
207:                        // produce a problem method accounting for this fatal error
208:                        int problemsLength;
209:                        CategorizedProblem[] problems = this .scope
210:                                .referenceCompilationUnit().compilationResult
211:                                .getAllProblems();
212:                        CategorizedProblem[] problemsCopy = new CategorizedProblem[problemsLength = problems.length];
213:                        System.arraycopy(problems, 0, problemsCopy, 0,
214:                                problemsLength);
215:                        classFile.addProblemMethod(this , this .binding,
216:                                problemsCopy, problemResetPC);
217:                    }
218:                }
219:            }
220:
221:            public void generateCode(ClassFile classFile) {
222:
223:                classFile.generateMethodInfoHeader(this .binding);
224:                int methodAttributeOffset = classFile.contentsOffset;
225:                int attributeNumber = classFile
226:                        .generateMethodInfoAttribute(this .binding);
227:                if ((!this .binding.isNative()) && (!this .binding.isAbstract())) {
228:                    int codeAttributeOffset = classFile.contentsOffset;
229:                    classFile.generateCodeAttributeHeader();
230:                    CodeStream codeStream = classFile.codeStream;
231:                    codeStream.reset(this , classFile);
232:                    // initialize local positions
233:                    this .scope.computeLocalVariablePositions(this .binding
234:                            .isStatic() ? 0 : 1, codeStream);
235:
236:                    // arguments initialization for local variable debug attributes
237:                    if (this .arguments != null) {
238:                        for (int i = 0, max = this .arguments.length; i < max; i++) {
239:                            LocalVariableBinding argBinding;
240:                            codeStream
241:                                    .addVisibleLocalVariable(argBinding = this .arguments[i].binding);
242:                            argBinding.recordInitializationStartPC(0);
243:                        }
244:                    }
245:                    if (this .statements != null) {
246:                        for (int i = 0, max = this .statements.length; i < max; i++)
247:                            this .statements[i].generateCode(this .scope,
248:                                    codeStream);
249:                    }
250:                    // if a problem got reported during code gen, then trigger problem method creation
251:                    if (this .ignoreFurtherInvestigation) {
252:                        throw new AbortMethod(this .scope
253:                                .referenceCompilationUnit().compilationResult,
254:                                null);
255:                    }
256:                    if ((this .bits & ASTNode.NeedFreeReturn) != 0) {
257:                        codeStream.return_();
258:                    }
259:                    // local variable attributes
260:                    codeStream.exitUserScope(this .scope);
261:                    codeStream
262:                            .recordPositionsFrom(0, this .declarationSourceEnd);
263:                    classFile.completeCodeAttribute(codeAttributeOffset);
264:                    attributeNumber++;
265:                } else {
266:                    checkArgumentsSize();
267:                }
268:                classFile.completeMethodInfo(methodAttributeOffset,
269:                        attributeNumber);
270:            }
271:
272:            private void checkArgumentsSize() {
273:                TypeBinding[] parameters = this .binding.parameters;
274:                int size = 1; // an abstact method or a native method cannot be static
275:                for (int i = 0, max = parameters.length; i < max; i++) {
276:                    TypeBinding parameter = parameters[i];
277:                    if (parameter == TypeBinding.LONG
278:                            || parameter == TypeBinding.DOUBLE) {
279:                        size += 2;
280:                    } else {
281:                        size++;
282:                    }
283:                    if (size > 0xFF) {
284:                        this .scope.problemReporter()
285:                                .noMoreAvailableSpaceForArgument(
286:                                        this .scope.locals[i],
287:                                        this .scope.locals[i].declaration);
288:                    }
289:                }
290:            }
291:
292:            public boolean hasErrors() {
293:                return this .ignoreFurtherInvestigation;
294:            }
295:
296:            public boolean isAbstract() {
297:
298:                if (this .binding != null)
299:                    return this .binding.isAbstract();
300:                return (this .modifiers & ClassFileConstants.AccAbstract) != 0;
301:            }
302:
303:            public boolean isAnnotationMethod() {
304:
305:                return false;
306:            }
307:
308:            public boolean isClinit() {
309:
310:                return false;
311:            }
312:
313:            public boolean isConstructor() {
314:
315:                return false;
316:            }
317:
318:            public boolean isDefaultConstructor() {
319:
320:                return false;
321:            }
322:
323:            public boolean isInitializationMethod() {
324:
325:                return false;
326:            }
327:
328:            public boolean isMethod() {
329:
330:                return false;
331:            }
332:
333:            public boolean isNative() {
334:
335:                if (this .binding != null)
336:                    return this .binding.isNative();
337:                return (this .modifiers & ClassFileConstants.AccNative) != 0;
338:            }
339:
340:            public boolean isStatic() {
341:
342:                if (this .binding != null)
343:                    return this .binding.isStatic();
344:                return (this .modifiers & ClassFileConstants.AccStatic) != 0;
345:            }
346:
347:            /**
348:             * Fill up the method body with statement
349:             * @param parser
350:             * @param unit
351:             */
352:            public abstract void parseStatements(Parser parser,
353:                    CompilationUnitDeclaration unit);
354:
355:            public StringBuffer print(int tab, StringBuffer output) {
356:
357:                if (this .javadoc != null) {
358:                    this .javadoc.print(tab, output);
359:                }
360:                printIndent(tab, output);
361:                printModifiers(this .modifiers, output);
362:                if (this .annotations != null)
363:                    printAnnotations(this .annotations, output);
364:
365:                TypeParameter[] typeParams = typeParameters();
366:                if (typeParams != null) {
367:                    output.append('<');
368:                    int max = typeParams.length - 1;
369:                    for (int j = 0; j < max; j++) {
370:                        typeParams[j].print(0, output);
371:                        output.append(", ");//$NON-NLS-1$
372:                    }
373:                    typeParams[max].print(0, output);
374:                    output.append('>');
375:                }
376:
377:                printReturnType(0, output).append(this .selector).append('(');
378:                if (this .arguments != null) {
379:                    for (int i = 0; i < this .arguments.length; i++) {
380:                        if (i > 0)
381:                            output.append(", "); //$NON-NLS-1$
382:                        this .arguments[i].print(0, output);
383:                    }
384:                }
385:                output.append(')');
386:                if (this .thrownExceptions != null) {
387:                    output.append(" throws "); //$NON-NLS-1$
388:                    for (int i = 0; i < this .thrownExceptions.length; i++) {
389:                        if (i > 0)
390:                            output.append(", "); //$NON-NLS-1$
391:                        this .thrownExceptions[i].print(0, output);
392:                    }
393:                }
394:                printBody(tab + 1, output);
395:                return output;
396:            }
397:
398:            public StringBuffer printBody(int indent, StringBuffer output) {
399:
400:                if (isAbstract()
401:                        || (this .modifiers & ExtraCompilerModifiers.AccSemicolonBody) != 0)
402:                    return output.append(';');
403:
404:                output.append(" {"); //$NON-NLS-1$
405:                if (this .statements != null) {
406:                    for (int i = 0; i < this .statements.length; i++) {
407:                        output.append('\n');
408:                        this .statements[i].printStatement(indent, output);
409:                    }
410:                }
411:                output.append('\n');
412:                printIndent(indent == 0 ? 0 : indent - 1, output).append('}');
413:                return output;
414:            }
415:
416:            public StringBuffer printReturnType(int indent, StringBuffer output) {
417:
418:                return output;
419:            }
420:
421:            public void resolve(ClassScope upperScope) {
422:
423:                if (this .binding == null) {
424:                    this .ignoreFurtherInvestigation = true;
425:                }
426:
427:                try {
428:                    bindArguments();
429:                    bindThrownExceptions();
430:                    resolveJavadoc();
431:                    resolveAnnotations(scope, this .annotations, this .binding);
432:                    resolveStatements();
433:                    // check @Deprecated annotation presence
434:                    if (this .binding != null
435:                            && (this .binding.getAnnotationTagBits() & TagBits.AnnotationDeprecated) == 0
436:                            && (this .binding.modifiers & ClassFileConstants.AccDeprecated) != 0
437:                            && this .scope.compilerOptions().sourceLevel >= ClassFileConstants.JDK1_5) {
438:                        this .scope.problemReporter()
439:                                .missingDeprecatedAnnotationForMethod(this );
440:                    }
441:                } catch (AbortMethod e) {
442:                    // ========= abort on fatal error =============
443:                    this .ignoreFurtherInvestigation = true;
444:                }
445:            }
446:
447:            public void resolveJavadoc() {
448:
449:                if (this .binding == null)
450:                    return;
451:                if (this .javadoc != null) {
452:                    this .javadoc.resolve(this .scope);
453:                    return;
454:                }
455:                if (this .binding.declaringClass != null
456:                        && !this .binding.declaringClass.isLocalType()) {
457:                    this .scope.problemReporter().javadocMissing(
458:                            this .sourceStart, this .sourceEnd,
459:                            this .binding.modifiers);
460:                }
461:            }
462:
463:            public void resolveStatements() {
464:
465:                if (this .statements != null) {
466:                    for (int i = 0, length = this .statements.length; i < length; i++) {
467:                        this .statements[i].resolve(this .scope);
468:                    }
469:                } else if ((this .bits & UndocumentedEmptyBlock) != 0) {
470:                    this .scope.problemReporter().undocumentedEmptyBlock(
471:                            this .bodyStart - 1, this .bodyEnd + 1);
472:                }
473:            }
474:
475:            public void tagAsHavingErrors() {
476:
477:                this .ignoreFurtherInvestigation = true;
478:            }
479:
480:            public void traverse(ASTVisitor visitor, ClassScope classScope) {
481:                // default implementation: subclass will define it
482:            }
483:
484:            public TypeParameter[] typeParameters() {
485:                return null;
486:            }
487:        }
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