/** Generates 'this.<em>name</em>.size()' as an expression; if nullGuard is true, it's this.name == null ? 0 : this.name.size(). */ protected Expression getSize(EclipseNode builderType, char[] name, boolean nullGuard) { MessageSend invoke = new MessageSend(); ThisReference thisRef = new ThisReference(0, 0); FieldReference thisDotName = new FieldReference(name, 0L); thisDotName.receiver = thisRef; invoke.receiver = thisDotName; invoke.selector = SIZE_TEXT; if (!nullGuard) return invoke; ThisReference cdnThisRef = new ThisReference(0, 0); FieldReference cdnThisDotName = new FieldReference(name, 0L); cdnThisDotName.receiver = cdnThisRef; NullLiteral nullLiteral = new NullLiteral(0, 0); EqualExpression isNull = new EqualExpression(cdnThisDotName, nullLiteral, OperatorIds.EQUAL_EQUAL); IntLiteral zeroLiteral = makeIntLiteral(new char[] {'0'}, null); ConditionalExpression conditional = new ConditionalExpression(isNull, zeroLiteral, invoke); return conditional; }
public char[] returnVarNameIfNullCheck(Statement stat) { if (!(stat instanceof IfStatement)) return null; /* Check that the if's statement is a throw statement, possibly in a block. */ { Statement then = ((IfStatement) stat).thenStatement; if (then instanceof Block) { Statement[] blockStatements = ((Block) then).statements; if (blockStatements == null || blockStatements.length == 0) return null; then = blockStatements[0]; } if (!(then instanceof ThrowStatement)) return null; } /* Check that the if's conditional is like 'x == null'. Return from this method (don't generate a nullcheck) if 'x' is equal to our own variable's name: There's already a nullcheck here. */ { Expression cond = ((IfStatement) stat).condition; if (!(cond instanceof EqualExpression)) return null; EqualExpression bin = (EqualExpression) cond; int operatorId = ((bin.bits & ASTNode.OperatorMASK) >> ASTNode.OperatorSHIFT); if (operatorId != OperatorIds.EQUAL_EQUAL) return null; if (!(bin.left instanceof SingleNameReference)) return null; if (!(bin.right instanceof NullLiteral)) return null; return ((SingleNameReference) bin.left).token; } }
private void generateClearMethod(TypeReference returnType, Statement returnStatement, SingularData data, EclipseNode builderType) { MethodDeclaration md = new MethodDeclaration(((CompilationUnitDeclaration) builderType.top().get()).compilationResult); md.bits |= ECLIPSE_DO_NOT_TOUCH_FLAG; md.modifiers = ClassFileConstants.AccPublic; FieldReference thisDotField = new FieldReference(data.getPluralName(), 0L); thisDotField.receiver = new ThisReference(0, 0); FieldReference thisDotField2 = new FieldReference(data.getPluralName(), 0L); thisDotField2.receiver = new ThisReference(0, 0); md.selector = HandlerUtil.buildAccessorName("clear", new String(data.getPluralName())).toCharArray(); MessageSend clearMsg = new MessageSend(); clearMsg.receiver = thisDotField2; clearMsg.selector = "clear".toCharArray(); Statement clearStatement = new IfStatement(new EqualExpression(thisDotField, new NullLiteral(0, 0), OperatorIds.NOT_EQUAL), clearMsg, 0, 0); md.statements = returnStatement != null ? new Statement[] {clearStatement, returnStatement} : new Statement[] {clearStatement}; md.returnType = returnType; injectMethod(builderType, md); }
/** * Generates a new statement that checks if the given variable is null, and if so, throws a {@code NullPointerException} with the * variable name as message. */ public static Statement generateNullCheck(AbstractVariableDeclaration variable, ASTNode source) { int pS = source.sourceStart, pE = source.sourceEnd; long p = (long)pS << 32 | pE; if (isPrimitive(variable.type)) return null; AllocationExpression exception = new AllocationExpression(); setGeneratedBy(exception, source); exception.type = new QualifiedTypeReference(fromQualifiedName("java.lang.NullPointerException"), new long[]{p, p, p}); setGeneratedBy(exception.type, source); exception.arguments = new Expression[] { new StringLiteral(variable.name, pS, pE, 0)}; setGeneratedBy(exception.arguments[0], source); ThrowStatement throwStatement = new ThrowStatement(exception, pS, pE); setGeneratedBy(throwStatement, source); SingleNameReference varName = new SingleNameReference(variable.name, p); setGeneratedBy(varName, source); NullLiteral nullLiteral = new NullLiteral(pS, pE); setGeneratedBy(nullLiteral, source); EqualExpression equalExpression = new EqualExpression(varName, nullLiteral, OperatorIds.EQUAL_EQUAL); equalExpression.sourceStart = pS; equalExpression.statementEnd = equalExpression.sourceEnd = pE; setGeneratedBy(equalExpression, source); IfStatement ifStatement = new IfStatement(equalExpression, throwStatement, 0, 0); setGeneratedBy(ifStatement, source); return ifStatement; }
private static Expression getDefaultExpr(TypeReference type, int s, int e) { char[] lastToken = type.getLastToken(); if (Arrays.equals(TypeConstants.BOOLEAN, lastToken)) return new FalseLiteral(s, e); if (Arrays.equals(TypeConstants.CHAR, lastToken)) return new CharLiteral(new char[] {'\'', '\\', '0', '\''}, s, e); if (Arrays.equals(TypeConstants.BYTE, lastToken) || Arrays.equals(TypeConstants.SHORT, lastToken) || Arrays.equals(TypeConstants.INT, lastToken)) return IntLiteral.buildIntLiteral(new char[] {'0'}, s, e); if (Arrays.equals(TypeConstants.LONG, lastToken)) return LongLiteral.buildLongLiteral(new char[] {'0', 'L'}, s, e); if (Arrays.equals(TypeConstants.FLOAT, lastToken)) return new FloatLiteral(new char[] {'0', 'F'}, s, e); if (Arrays.equals(TypeConstants.DOUBLE, lastToken)) return new DoubleLiteral(new char[] {'0', 'D'}, s, e); return new NullLiteral(s, e); }
void generateClearMethod(TypeReference returnType, Statement returnStatement, SingularData data, EclipseNode builderType) { MethodDeclaration md = new MethodDeclaration(((CompilationUnitDeclaration) builderType.top().get()).compilationResult); md.bits |= ECLIPSE_DO_NOT_TOUCH_FLAG; md.modifiers = ClassFileConstants.AccPublic; FieldReference thisDotField = new FieldReference(data.getPluralName(), 0L); thisDotField.receiver = new ThisReference(0, 0); Assignment a = new Assignment(thisDotField, new NullLiteral(0, 0), 0); md.selector = HandlerUtil.buildAccessorName("clear", new String(data.getPluralName())).toCharArray(); md.statements = returnStatement != null ? new Statement[] {a, returnStatement} : new Statement[] {a}; md.returnType = returnType; injectMethod(builderType, md); }
protected Statement createConstructBuilderVarIfNeeded(SingularData data, EclipseNode builderType) { FieldReference thisDotField = new FieldReference(data.getPluralName(), 0L); thisDotField.receiver = new ThisReference(0, 0); FieldReference thisDotField2 = new FieldReference(data.getPluralName(), 0L); thisDotField2.receiver = new ThisReference(0, 0); Expression cond = new EqualExpression(thisDotField, new NullLiteral(0, 0), OperatorIds.EQUAL_EQUAL); MessageSend createBuilderInvoke = new MessageSend(); char[][] tokenizedName = makeGuavaTypeName(getSimpleTargetTypeName(data), false); createBuilderInvoke.receiver = new QualifiedNameReference(tokenizedName, NULL_POSS, 0, 0); createBuilderInvoke.selector = getBuilderMethodName(data); return new IfStatement(cond, new Assignment(thisDotField2, createBuilderInvoke, 0), 0, 0); }
private void generateClearMethod(TypeReference returnType, Statement returnStatement, SingularData data, EclipseNode builderType) { MethodDeclaration md = new MethodDeclaration(((CompilationUnitDeclaration) builderType.top().get()).compilationResult); md.bits |= ECLIPSE_DO_NOT_TOUCH_FLAG; md.modifiers = ClassFileConstants.AccPublic; String pN = new String(data.getPluralName()); char[] keyFieldName = (pN + "$key").toCharArray(); char[] valueFieldName = (pN + "$value").toCharArray(); FieldReference thisDotField = new FieldReference(keyFieldName, 0L); thisDotField.receiver = new ThisReference(0, 0); FieldReference thisDotField2 = new FieldReference(keyFieldName, 0L); thisDotField2.receiver = new ThisReference(0, 0); FieldReference thisDotField3 = new FieldReference(valueFieldName, 0L); thisDotField3.receiver = new ThisReference(0, 0); md.selector = HandlerUtil.buildAccessorName("clear", new String(data.getPluralName())).toCharArray(); MessageSend clearMsg1 = new MessageSend(); clearMsg1.receiver = thisDotField2; clearMsg1.selector = "clear".toCharArray(); MessageSend clearMsg2 = new MessageSend(); clearMsg2.receiver = thisDotField3; clearMsg2.selector = "clear".toCharArray(); Block clearMsgs = new Block(2); clearMsgs.statements = new Statement[] {clearMsg1, clearMsg2}; Statement clearStatement = new IfStatement(new EqualExpression(thisDotField, new NullLiteral(0, 0), OperatorIds.NOT_EQUAL), clearMsgs, 0, 0); md.statements = returnStatement != null ? new Statement[] {clearStatement, returnStatement} : new Statement[] {clearStatement}; md.returnType = returnType; injectMethod(builderType, md); }
/** * @see org.eclipse.jdt.internal.compiler.ASTVisitor#visit(org.eclipse.jdt.internal.compiler.ast.NullLiteral, org.eclipse.jdt.internal.compiler.lookup.BlockScope) */ public boolean visit(NullLiteral nullLiteral, BlockScope scope) { final int numberOfParens = (nullLiteral.bits & ASTNode.ParenthesizedMASK) >> ASTNode.ParenthesizedSHIFT; if (numberOfParens > 0) { manageOpeningParenthesizedExpression(nullLiteral, numberOfParens); } this.scribe.printNextToken(TerminalTokens.TokenNamenull); if (numberOfParens > 0) { manageClosingParenthesizedExpression(nullLiteral, numberOfParens); } return false; }
/** * Generates a new statement that checks if the given variable is null, and if so, throws a specified exception with the * variable name as message. * * @param exName The name of the exception to throw; normally {@code java.lang.NullPointerException}. */ public static Statement generateNullCheck(AbstractVariableDeclaration variable, EclipseNode sourceNode) { NullCheckExceptionType exceptionType = sourceNode.getAst().readConfiguration(ConfigurationKeys.NON_NULL_EXCEPTION_TYPE); if (exceptionType == null) exceptionType = NullCheckExceptionType.NULL_POINTER_EXCEPTION; ASTNode source = sourceNode.get(); int pS = source.sourceStart, pE = source.sourceEnd; long p = (long)pS << 32 | pE; if (isPrimitive(variable.type)) return null; AllocationExpression exception = new AllocationExpression(); setGeneratedBy(exception, source); int partCount = 1; String exceptionTypeStr = exceptionType.getExceptionType(); for (int i = 0; i < exceptionTypeStr.length(); i++) if (exceptionTypeStr.charAt(i) == '.') partCount++; long[] ps = new long[partCount]; Arrays.fill(ps, 0L); exception.type = new QualifiedTypeReference(fromQualifiedName(exceptionTypeStr), ps); setGeneratedBy(exception.type, source); exception.arguments = new Expression[] { new StringLiteral(exceptionType.toExceptionMessage(new String(variable.name)).toCharArray(), pS, pE, 0) }; setGeneratedBy(exception.arguments[0], source); ThrowStatement throwStatement = new ThrowStatement(exception, pS, pE); setGeneratedBy(throwStatement, source); SingleNameReference varName = new SingleNameReference(variable.name, p); setGeneratedBy(varName, source); NullLiteral nullLiteral = new NullLiteral(pS, pE); setGeneratedBy(nullLiteral, source); EqualExpression equalExpression = new EqualExpression(varName, nullLiteral, OperatorIds.EQUAL_EQUAL); equalExpression.sourceStart = pS; equalExpression.statementEnd = equalExpression.sourceEnd = pE; setGeneratedBy(equalExpression, source); Block throwBlock = new Block(0); throwBlock.statements = new Statement[] {throwStatement}; throwBlock.sourceStart = pS; throwBlock.sourceEnd = pE; setGeneratedBy(throwBlock, source); IfStatement ifStatement = new IfStatement(equalExpression, throwBlock, 0, 0); setGeneratedBy(ifStatement, source); return ifStatement; }
@Override public boolean visit(NullLiteral node, BlockScope scope) { fixPositions(setGeneratedBy(node, source)); return super.visit(node, scope); }
public boolean visit(NullLiteral nullLiteral, BlockScope scope) { addRealFragment(nullLiteral); return false; }
protected Object getMemberValue(org.eclipse.jdt.internal.core.MemberValuePair memberValuePair, Expression expression) { if (expression instanceof NullLiteral) { return null; } else if (expression instanceof Literal) { ((Literal) expression).computeConstant(); return Util.getAnnotationMemberValue(memberValuePair, expression.constant); } else if (expression instanceof org.eclipse.jdt.internal.compiler.ast.Annotation) { org.eclipse.jdt.internal.compiler.ast.Annotation annotation = (org.eclipse.jdt.internal.compiler.ast.Annotation) expression; Object handle = acceptAnnotation(annotation, null, (JavaElement) this.handleStack.peek()); memberValuePair.valueKind = IMemberValuePair.K_ANNOTATION; return handle; } else if (expression instanceof ClassLiteralAccess) { ClassLiteralAccess classLiteral = (ClassLiteralAccess) expression; char[] name = CharOperation.concatWith(classLiteral.type.getTypeName(), '.'); memberValuePair.valueKind = IMemberValuePair.K_CLASS; return new String(name); } else if (expression instanceof QualifiedNameReference) { char[] qualifiedName = CharOperation.concatWith(((QualifiedNameReference) expression).tokens, '.'); memberValuePair.valueKind = IMemberValuePair.K_QUALIFIED_NAME; return new String(qualifiedName); } else if (expression instanceof SingleNameReference) { char[] simpleName = ((SingleNameReference) expression).token; if (simpleName == RecoveryScanner.FAKE_IDENTIFIER) { memberValuePair.valueKind = IMemberValuePair.K_UNKNOWN; return null; } memberValuePair.valueKind = IMemberValuePair.K_SIMPLE_NAME; return new String(simpleName); } else if (expression instanceof ArrayInitializer) { memberValuePair.valueKind = -1; // modified below by the first call to getMemberValue(...) Expression[] expressions = ((ArrayInitializer) expression).expressions; int length = expressions == null ? 0 : expressions.length; Object[] values = new Object[length]; for (int i = 0; i < length; i++) { int previousValueKind = memberValuePair.valueKind; Object value = getMemberValue(memberValuePair, expressions[i]); if (previousValueKind != -1 && memberValuePair.valueKind != previousValueKind) { // values are heterogeneous, value kind is thus unknown memberValuePair.valueKind = IMemberValuePair.K_UNKNOWN; } values[i] = value; } if (memberValuePair.valueKind == -1) memberValuePair.valueKind = IMemberValuePair.K_UNKNOWN; return values; } else if (expression instanceof UnaryExpression) { // to deal with negative numerals (see bug - 248312) UnaryExpression unaryExpression = (UnaryExpression) expression; if ((unaryExpression.bits & ASTNode.OperatorMASK) >> ASTNode.OperatorSHIFT == OperatorIds.MINUS) { if (unaryExpression.expression instanceof Literal) { Literal subExpression = (Literal) unaryExpression.expression; subExpression.computeConstant(); return Util.getNegativeAnnotationMemberValue(memberValuePair, subExpression.constant); } } memberValuePair.valueKind = IMemberValuePair.K_UNKNOWN; return null; } else { memberValuePair.valueKind = IMemberValuePair.K_UNKNOWN; return null; } }
private Object getAnnotationMemberValue(MemberValuePair memberValuePair, Expression expression, JavaElement parentElement) { if (expression instanceof NullLiteral) { return null; } else if (expression instanceof Literal) { ((Literal) expression).computeConstant(); return Util.getAnnotationMemberValue(memberValuePair, expression.constant); } else if (expression instanceof org.eclipse.jdt.internal.compiler.ast.Annotation) { memberValuePair.valueKind = IMemberValuePair.K_ANNOTATION; return getAnnotation((org.eclipse.jdt.internal.compiler.ast.Annotation) expression, parentElement); } else if (expression instanceof ClassLiteralAccess) { ClassLiteralAccess classLiteral = (ClassLiteralAccess) expression; char[] typeName = CharOperation.concatWith(classLiteral.type.getTypeName(), '.'); memberValuePair.valueKind = IMemberValuePair.K_CLASS; return new String(typeName); } else if (expression instanceof QualifiedNameReference) { char[] qualifiedName = CharOperation.concatWith(((QualifiedNameReference) expression).tokens, '.'); memberValuePair.valueKind = IMemberValuePair.K_QUALIFIED_NAME; return new String(qualifiedName); } else if (expression instanceof SingleNameReference) { char[] simpleName = ((SingleNameReference) expression).token; if (simpleName == RecoveryScanner.FAKE_IDENTIFIER) { memberValuePair.valueKind = IMemberValuePair.K_UNKNOWN; return null; } memberValuePair.valueKind = IMemberValuePair.K_SIMPLE_NAME; return new String(simpleName); } else if (expression instanceof ArrayInitializer) { memberValuePair.valueKind = -1; // modified below by the first call to getMemberValue(...) Expression[] expressions = ((ArrayInitializer) expression).expressions; int length = expressions == null ? 0 : expressions.length; Object[] values = new Object[length]; for (int i = 0; i < length; i++) { int previousValueKind = memberValuePair.valueKind; Object value = getAnnotationMemberValue(memberValuePair, expressions[i], parentElement); if (previousValueKind != -1 && memberValuePair.valueKind != previousValueKind) { // values are heterogeneous, value kind is thus unknown memberValuePair.valueKind = IMemberValuePair.K_UNKNOWN; } values[i] = value; } if (memberValuePair.valueKind == -1) memberValuePair.valueKind = IMemberValuePair.K_UNKNOWN; return values; } else if (expression instanceof UnaryExpression) { //to deal with negative numerals (see bug - 248312) UnaryExpression unaryExpression = (UnaryExpression) expression; if ((unaryExpression.bits & ASTNode.OperatorMASK) >> ASTNode.OperatorSHIFT == OperatorIds.MINUS) { if (unaryExpression.expression instanceof Literal) { Literal subExpression = (Literal) unaryExpression.expression; subExpression.computeConstant(); return Util.getNegativeAnnotationMemberValue(memberValuePair, subExpression.constant); } } memberValuePair.valueKind = IMemberValuePair.K_UNKNOWN; return null; } else { memberValuePair.valueKind = IMemberValuePair.K_UNKNOWN; return null; } }
@Override public void endVisit(NullLiteral x, BlockScope scope) { push(JNullLiteral.INSTANCE); }
@Override public boolean visit(NullLiteral node, BlockScope scope) { setGeneratedBy(node, source); applyOffsetExpression(node); return super.visit(node, scope); }
