org.eclipse.jdt.core.dom.PrimitiveType Java Examples

/**
 * Creates the corresponding statement for the method invocation, based on
 * the return type.
 *
 * @param declaration the method declaration where the invocation statement
 *            is inserted
 * @param invocation the method invocation being encapsulated by the
 *            resulting statement
 * @return the corresponding statement
 */
protected Statement createMethodInvocation(final MethodDeclaration declaration, final MethodInvocation invocation) {
	Assert.isNotNull(declaration);
	Assert.isNotNull(invocation);
	Statement statement= null;
	final Type type= declaration.getReturnType2();
	if (type == null) {
		statement= createExpressionStatement(invocation);
	} else {
		if (type instanceof PrimitiveType) {
			final PrimitiveType primitive= (PrimitiveType) type;
			if (primitive.getPrimitiveTypeCode().equals(PrimitiveType.VOID)) {
				statement= createExpressionStatement(invocation);
			} else {
				statement= createReturnStatement(invocation);
			}
		} else {
			statement= createReturnStatement(invocation);
		}
	}
	return statement;
}
 

private Expression createShiftAssignment(Expression shift1, Expression shift2) {
	// (int)(element ^ (element >>> 32));
	// see implementation in Arrays.hashCode(), Double.hashCode() and
	// Long.hashCode()
	CastExpression ce= fAst.newCastExpression();
	ce.setType(fAst.newPrimitiveType(PrimitiveType.INT));

	InfixExpression unsignedShiftRight= fAst.newInfixExpression();
	unsignedShiftRight.setLeftOperand(shift1);
	unsignedShiftRight.setRightOperand(fAst.newNumberLiteral("32")); //$NON-NLS-1$
	unsignedShiftRight.setOperator(Operator.RIGHT_SHIFT_UNSIGNED);

	InfixExpression xor= fAst.newInfixExpression();
	xor.setLeftOperand(shift2);
	xor.setRightOperand(parenthesize(unsignedShiftRight));
	xor.setOperator(InfixExpression.Operator.XOR);

	ce.setExpression(parenthesize(xor));
	return ce;
}
 

public boolean isBooleanType(final Expression expression) {
  if ((expression instanceof BooleanLiteral)) {
    return true;
  }
  if ((expression instanceof SimpleName)) {
    final Type declType = this._aSTFlattenerUtils.findDeclaredType(((SimpleName)expression));
    if ((declType != null)) {
      boolean _matched = false;
      boolean _isPrimitiveType = declType.isPrimitiveType();
      if (_isPrimitiveType) {
        _matched=true;
        PrimitiveType.Code _primitiveTypeCode = ((PrimitiveType) declType).getPrimitiveTypeCode();
        return Objects.equal(_primitiveTypeCode, PrimitiveType.BOOLEAN);
      }
    }
  }
  return false;
}
 

public static boolean isGeneralizeTypeAvailable(final IJavaElement element) throws JavaModelException {
	if (element != null && element.exists()) {
		String type= null;
		if (element instanceof IMethod)
			type= ((IMethod) element).getReturnType();
		else if (element instanceof IField) {
			final IField field= (IField) element;
			if (JdtFlags.isEnum(field))
				return false;
			type= field.getTypeSignature();
		} else if (element instanceof ILocalVariable)
			return true;
		else if (element instanceof IType) {
			final IType clazz= (IType) element;
			if (JdtFlags.isEnum(clazz))
				return false;
			return true;
		}
		if (type == null || PrimitiveType.toCode(Signature.toString(type)) != null)
			return false;
		return true;
	}
	return false;
}
 

public static boolean isGeneralizeTypeAvailable(final IStructuredSelection selection) throws JavaModelException {
	if (selection.size() == 1) {
		final Object element= selection.getFirstElement();
		if (element instanceof IMethod) {
			final IMethod method= (IMethod) element;
			if (!method.exists())
				return false;
			final String type= method.getReturnType();
			if (PrimitiveType.toCode(Signature.toString(type)) == null)
				return Checks.isAvailable(method);
		} else if (element instanceof IField) {
			final IField field= (IField) element;
			if (!field.exists())
				return false;
			if (!JdtFlags.isEnum(field))
				return Checks.isAvailable(field);
		}
	}
	return false;
}
 

/**
 * Creates the corresponding statement for the method invocation, based on
 * the return type.
 *
 * @param declaration the method declaration where the invocation statement
 *            is inserted
 * @param invocation the method invocation being encapsulated by the
 *            resulting statement
 * @return the corresponding statement
 */
protected Statement createMethodInvocation(final MethodDeclaration declaration, final MethodInvocation invocation) {
	Assert.isNotNull(declaration);
	Assert.isNotNull(invocation);
	Statement statement= null;
	final Type type= declaration.getReturnType2();
	if (type == null)
		statement= createExpressionStatement(invocation);
	else {
		if (type instanceof PrimitiveType) {
			final PrimitiveType primitive= (PrimitiveType) type;
			if (primitive.getPrimitiveTypeCode().equals(PrimitiveType.VOID))
				statement= createExpressionStatement(invocation);
			else
				statement= createReturnStatement(invocation);
		} else
			statement= createReturnStatement(invocation);
	}
	return statement;
}
 

private void addNewConstructorToSubclass(AbstractTypeDeclaration subclass, CompilationUnitRewrite cuRewrite) {
	AST ast= subclass.getAST();
	MethodDeclaration newConstructor= ast.newMethodDeclaration();
	newConstructor.setName(ast.newSimpleName(subclass.getName().getIdentifier()));
	newConstructor.setConstructor(true);
	newConstructor.setJavadoc(null);
	newConstructor.modifiers().addAll(ASTNodeFactory.newModifiers(ast, getAccessModifier(subclass)));
	newConstructor.setReturnType2(ast.newPrimitiveType(PrimitiveType.VOID));
	Block body= ast.newBlock();
	newConstructor.setBody(body);
	SuperConstructorInvocation superCall= ast.newSuperConstructorInvocation();
	addArgumentsToNewSuperConstructorCall(superCall, cuRewrite);
	body.statements().add(superCall);

	String msg= RefactoringCoreMessages.ChangeSignatureRefactoring_add_constructor;
	TextEditGroup description= cuRewrite.createGroupDescription(msg);
	cuRewrite.getASTRewrite().getListRewrite(subclass, subclass.getBodyDeclarationsProperty()).insertFirst(newConstructor, description);

	// TODO use AbstractTypeDeclaration
}
 

private static IMember getMember(IStructuredSelection selection) throws JavaModelException {
	if (selection.size() != 1)
		return null;

	Object element= selection.getFirstElement();
	if (!(element instanceof IMember))
		return null;

	if (element instanceof IMethod) {
		IMethod method= (IMethod)element;
		String returnType= method.getReturnType();
		if (PrimitiveType.toCode(Signature.toString(returnType)) != null)
			return null;
		return method;
	} else if (element instanceof IField && !JdtFlags.isEnum((IMember) element)) {
		return (IField)element;
	}
	return null;
}
 

@Override
protected MethodDeclaration createMethodDeclaration(AST ast) {
  MethodDeclaration asyncMethodDecl = ast.newMethodDeclaration();

  // New method has same name as original
  String methodName = getSyncMethodDeclaration().getName().getIdentifier();
  asyncMethodDecl.setName(ast.newSimpleName(methodName));

  // Async method has void return type by default (the user can also use
  // Request or RequestBuilder as the return type to get more functionality).
  // TODO: investigate whether we can enter linked mode after the fix is
  // applied, so the user can choose what return type to use. See
  // LinkedCorrectionProposal, which is a subclass of
  // ASTRewriteCorrectionProposal.
  asyncMethodDecl.setReturnType2(ast.newPrimitiveType(PrimitiveType.VOID));

  addAsyncParameters(ast, asyncMethodDecl);

  // TODO: generate comments for new method

  return asyncMethodDecl;
}
 

private InstanceofExpr visit(InstanceofExpression node) {
	int startLine = _cunit.getLineNumber(node.getStartPosition());
	int endLine = _cunit.getLineNumber(node.getStartPosition() + node.getLength());
	InstanceofExpr instanceofExpr = new InstanceofExpr(startLine, endLine, node);
	
	Expr expression = (Expr) process(node.getLeftOperand());
	expression.setParent(instanceofExpr);
	instanceofExpr.setExpression(expression);
	
	instanceofExpr.setInstanceType(node.getRightOperand());
	
	AST ast = AST.newAST(AST.JLS8);
	Type exprType = ast.newPrimitiveType(PrimitiveType.BOOLEAN);
	instanceofExpr.setType(exprType);
	
	return instanceofExpr;
}
 

private static Type parsePreExprType(Expr expr, String operator){
	AST ast = AST.newAST(AST.JLS8);
	switch(operator){
	case "++":
	case "--":
		return ast.newPrimitiveType(PrimitiveType.INT);
	case "+":
	case "-":
		return expr.getType();
	case "~":
	case "!":
		return ast.newPrimitiveType(PrimitiveType.BOOLEAN);
	default :
		return null;
	}
}
 

public boolean visit(PrimitiveType type) {
	/*
	 * PrimitiveType: 
	    byte
	    short
	    char
	    int
	    long
	    float
	    double
	    boolean
	    void
	 */
	styledString.append(type.getPrimitiveTypeCode().toString(), determineDiffStyle(type, new StyledStringStyler(keywordStyle)));
	return false;
}
 

public static boolean isVoid(Type type) {
	if (type instanceof PrimitiveType) {
		return ((PrimitiveType) type).getPrimitiveTypeCode().equals(PrimitiveType.VOID);
	} else {
		return false;
	}
}
 

public static boolean isBoolean(Type type) {
	if (type instanceof PrimitiveType) {
		return ((PrimitiveType) type).getPrimitiveTypeCode().equals(PrimitiveType.BOOLEAN);
	} else {
		return false;
	}
}
 

public static String buildASTLabel(ASTNode node) {
	String label = node.getClass().getSimpleName();
	if (node instanceof Expression) {
		if (node.getClass().getSimpleName().endsWith("Literal")) {
			return label + "(" + node.toString() + ")";
		}
		int type = node.getNodeType();
		switch (type) {
		case ASTNode.INFIX_EXPRESSION:
			return label + "(" + ((InfixExpression) node).getOperator().toString() + ")";
		case ASTNode.SIMPLE_NAME:
			return label + "(" + node.toString() + ")";
		case ASTNode.POSTFIX_EXPRESSION:
			return label + "(" + ((PostfixExpression) node).getOperator().toString() + ")";
		case ASTNode.PREFIX_EXPRESSION:
			return label + "(" + ((PrefixExpression) node).getOperator().toString() + ")";
		default:
			break;
		}
	} else if (node instanceof Modifier) {
		return label + "(" + node.toString() + ")";
	} else if (node instanceof Type) {
		if (node instanceof PrimitiveType)
			return label + "(" + node.toString() + ")";
	} else if (node instanceof TextElement) {
		return label + "(" + node.toString() + ")";
	} else if (node instanceof TagElement) {
		String tag = ((TagElement) node).getTagName();
		if (tag == null)
			return label;
		return label + "(" + tag + ")";
	}
	return label;
}
 

private BoolLiteral visit(BooleanLiteral node) {
	int startLine = _cunit.getLineNumber(node.getStartPosition());
	int endLine = _cunit.getLineNumber(node.getStartPosition() + node.getLength());
	BoolLiteral literal = new BoolLiteral(startLine, endLine, node);
	literal.setValue(node.booleanValue());
	AST ast = AST.newAST(AST.JLS8);
	Type type = ast.newPrimitiveType(PrimitiveType.BOOLEAN);
	literal.setType(type);
	
	return literal;
}
 

public static ITypeBinding[] getNarrowingTypes(AST ast, ITypeBinding type) {
	ArrayList<ITypeBinding> res= new ArrayList<ITypeBinding>();
	res.add(type);
	if (type.isPrimitive()) {
		Code code= PrimitiveType.toCode(type.getName());
		for (int i= 0; i < CODE_ORDER.length && code != CODE_ORDER[i]; i++) {
			String typeName= CODE_ORDER[i].toString();
			res.add(ast.resolveWellKnownType(typeName));
		}
	}
	return res.toArray(new ITypeBinding[res.size()]);
}
 

private CharLiteral visit(CharacterLiteral node) {
	int startLine = _cunit.getLineNumber(node.getStartPosition());
	int endLine = _cunit.getLineNumber(node.getStartPosition() + node.getLength());
	CharLiteral charLiteral = new CharLiteral(startLine, endLine, node);
	
	charLiteral.setValue(node.charValue());
	
	AST ast = AST.newAST(AST.JLS8);
	Type type = ast.newPrimitiveType(PrimitiveType.CHAR);
	charLiteral.setType(type);
	
	return charLiteral;
}
 

public static ITypeBinding[] getRelaxingTypes(AST ast, ITypeBinding type) {
	ArrayList<ITypeBinding> res= new ArrayList<ITypeBinding>();
	res.add(type);
	if (type.isArray()) {
		res.add(ast.resolveWellKnownType("java.lang.Object")); //$NON-NLS-1$
		// The following two types are not available in some j2me implementations, see https://bugs.eclipse.org/bugs/show_bug.cgi?id=288060 :
		ITypeBinding serializable= ast.resolveWellKnownType("java.io.Serializable"); //$NON-NLS-1$
		if (serializable != null)
			res.add(serializable);
		ITypeBinding cloneable= ast.resolveWellKnownType("java.lang.Cloneable"); //$NON-NLS-1$
		if (cloneable != null)
			res.add(cloneable);
	} else if (type.isPrimitive()) {
		Code code= PrimitiveType.toCode(type.getName());
		boolean found= false;
		for (int i= 0; i < CODE_ORDER.length; i++) {
			if (found) {
				String typeName= CODE_ORDER[i].toString();
				res.add(ast.resolveWellKnownType(typeName));
			}
			if (code == CODE_ORDER[i]) {
				found= true;
			}
		}
	} else {
		collectRelaxingTypes(res, type);
	}
	return res.toArray(new ITypeBinding[res.size()]);
}
 

private void handleType(Type type) {
	if (type instanceof PrimitiveType) {
		visit((PrimitiveType) type);
	} else if (type instanceof ArrayType) {
		visit((ArrayType) type);
	} else if (type instanceof SimpleType) {
		visit((SimpleType) type);
	} else if (type instanceof QualifiedType) {
		visit((QualifiedType) type);
	} else if (type instanceof ParameterizedType) {
		visit((ParameterizedType) type);
	} else if (type instanceof WildcardType) {
		visit((WildcardType) type);
	}
}
 

/**
 * Returns true iff 'methodDeclaration' represents a void static method named 'main' that takes a
 * single String[] parameter.
 */
private static boolean isMainMethod(MethodDeclaration methodDeclaration) {
  // Is it static?
  if ((methodDeclaration.getModifiers() & Modifier.STATIC) == 0) {
    return false;
  }
  // Does it return void?
  Type returnType = methodDeclaration.getReturnType2();
  if (!returnType.isPrimitiveType()) {
    return false;
  }
  if (((PrimitiveType) returnType).getPrimitiveTypeCode() != PrimitiveType.VOID) {
    return false;
  }
  // Is it called 'main'?
  if (!"main".equals(methodDeclaration.getName().getIdentifier())) {
    return false;
  }
  // Does it have a single parameter?
  if (methodDeclaration.parameters().size() != 1) {
    return false;
  }

  // Is the parameter's type String[]?
  SingleVariableDeclaration pt =
      getOnlyElement((List<SingleVariableDeclaration>) methodDeclaration.parameters());
  IVariableBinding vb = pt.resolveBinding();
  if (vb == null) {
    return false;
  }
  ITypeBinding tb = vb.getType();
  return tb != null && "java.lang.String[]".equals(tb.getQualifiedName());
}
 

private PrimitiveType.Code getPrimitiveTypeCode(String type) {
	PrimitiveType.Code code= PrimitiveType.toCode(type);
	if (code != null) {
		return code;
	}
	if (fEnclosingElement != null && JavaModelUtil.is50OrHigher(fEnclosingElement.getJavaProject())) {
		if (code == PrimitiveType.SHORT) {
			if ("java.lang.Short".equals(type)) { //$NON-NLS-1$
				return code;
			}
		} else if (code == PrimitiveType.INT) {
			if ("java.lang.Integer".equals(type)) { //$NON-NLS-1$
				return code;
			}
		} else if (code == PrimitiveType.LONG) {
			if ("java.lang.Long".equals(type)) { //$NON-NLS-1$
				return code;
			}
		} else if (code == PrimitiveType.FLOAT) {
			if ("java.lang.Float".equals(type)) { //$NON-NLS-1$
				return code;
			}
		} else if (code == PrimitiveType.DOUBLE) {
			if ("java.lang.Double".equals(type)) { //$NON-NLS-1$
				return code;
			}
		} else if (code == PrimitiveType.CHAR) {
			if ("java.lang.Character".equals(type)) { //$NON-NLS-1$
				return code;
			}
		} else if (code == PrimitiveType.BYTE) {
			if ("java.lang.Byte".equals(type)) { //$NON-NLS-1$
				return code;
			}
		}
	}
	return null;
}
 

private Statement encapsulateInvocation(MethodDeclaration declaration, MethodInvocation invocation) {
	final Type type= declaration.getReturnType2();

	if (type == null || (type instanceof PrimitiveType && PrimitiveType.VOID.equals( ((PrimitiveType) type).getPrimitiveTypeCode())))
		return invocation.getAST().newExpressionStatement(invocation);

	ReturnStatement statement= invocation.getAST().newReturnStatement();
	statement.setExpression(invocation);
	return statement;
}
 

private static boolean isVoidArrayType(Type type){
	if (! type.isArrayType())
		return false;

	ArrayType arrayType= (ArrayType)type;
	if (! arrayType.getElementType().isPrimitiveType())
		return false;
	PrimitiveType primitiveType= (PrimitiveType) arrayType.getElementType();
	return (primitiveType.getPrimitiveTypeCode() == PrimitiveType.VOID);
}
 

private static Type parseSuperType(String superType, boolean isInterface) {
	if (! superType.trim().equals(superType)) {
		return null;
	}

	StringBuffer cuBuff= new StringBuffer();
	if (isInterface)
		cuBuff.append("class __X__ implements "); //$NON-NLS-1$
	else
		cuBuff.append("class __X__ extends "); //$NON-NLS-1$
	int offset= cuBuff.length();
	cuBuff.append(superType).append(" {}"); //$NON-NLS-1$

	ASTParser p= ASTParser.newParser(ASTProvider.SHARED_AST_LEVEL);
	p.setSource(cuBuff.toString().toCharArray());
	Map<String, String> options= new HashMap<String, String>();
	JavaModelUtil.setComplianceOptions(options, JavaModelUtil.VERSION_LATEST);
	p.setCompilerOptions(options);
	CompilationUnit cu= (CompilationUnit) p.createAST(null);
	ASTNode selected= NodeFinder.perform(cu, offset, superType.length());
	if (selected instanceof Name)
		selected= selected.getParent();
	if (selected.getStartPosition() != offset
			|| selected.getLength() != superType.length()
			|| ! (selected instanceof Type)
			|| selected instanceof PrimitiveType) {
		return null;
	}
	Type type= (Type) selected;

	String typeNodeRange= cuBuff.substring(type.getStartPosition(), ASTNodes.getExclusiveEnd(type));
	if (! superType.equals(typeNodeRange)){
		return null;
	}
	return type;
}
 

/**
 * Checks if the assignment needs a downcast and inserts it if necessary
 *
 * @param expression the right hand-side
 * @param expressionType the type of the right hand-side. Can be null
 * @param ast the AST
 * @param variableType the Type of the variable the expression will be assigned to
 * @param is50OrHigher if <code>true</code> java 5.0 code will be assumed
 * @return the casted expression if necessary
 */
private static Expression createNarrowCastIfNessecary(Expression expression, ITypeBinding expressionType, AST ast, ITypeBinding variableType, boolean is50OrHigher) {
	PrimitiveType castTo= null;
	if (variableType.isEqualTo(expressionType))
		return expression; //no cast for same type
	if (is50OrHigher) {
		if (ast.resolveWellKnownType("java.lang.Character").isEqualTo(variableType)) //$NON-NLS-1$
			castTo= ast.newPrimitiveType(PrimitiveType.CHAR);
		if (ast.resolveWellKnownType("java.lang.Byte").isEqualTo(variableType)) //$NON-NLS-1$
			castTo= ast.newPrimitiveType(PrimitiveType.BYTE);
		if (ast.resolveWellKnownType("java.lang.Short").isEqualTo(variableType)) //$NON-NLS-1$
			castTo= ast.newPrimitiveType(PrimitiveType.SHORT);
	}
	if (ast.resolveWellKnownType("char").isEqualTo(variableType)) //$NON-NLS-1$
		castTo= ast.newPrimitiveType(PrimitiveType.CHAR);
	if (ast.resolveWellKnownType("byte").isEqualTo(variableType)) //$NON-NLS-1$
		castTo= ast.newPrimitiveType(PrimitiveType.BYTE);
	if (ast.resolveWellKnownType("short").isEqualTo(variableType)) //$NON-NLS-1$
		castTo= ast.newPrimitiveType(PrimitiveType.SHORT);
	if (castTo != null) {
		CastExpression cast= ast.newCastExpression();
		if (NecessaryParenthesesChecker.needsParentheses(expression, cast, CastExpression.EXPRESSION_PROPERTY)) {
			ParenthesizedExpression parenthesized= ast.newParenthesizedExpression();
			parenthesized.setExpression(expression);
			cast.setExpression(parenthesized);
		} else
			cast.setExpression(expression);
		cast.setType(castTo);
		return cast;
	}
	return expression;
}
 

private boolean isPrimitiveType(ITypeBinding type, PrimitiveType.Code[] codes) {
	for (int i= 0; i < codes.length; i++) {
		PrimitiveType.Code code= codes[i];
		if (isPrimitiveType(type, code))
			return true;
	}
	return false;
}
 

/**
 * Returns an expression that is assignable to the given type. <code>null</code> is
 * returned if the type is the 'void' type.
 *
 * @param ast The AST to create the expression for
 * @param type The type of the returned expression
 * @param extraDimensions Extra dimensions to the type
 * @return the Null-literal for reference types, a boolean-literal for a boolean type, a number
 * literal for primitive types or <code>null</code> if the type is void.
 */
public static Expression newDefaultExpression(AST ast, Type type, int extraDimensions) {
	if (extraDimensions == 0 && type.isPrimitiveType()) {
		PrimitiveType primitiveType= (PrimitiveType) type;
		if (primitiveType.getPrimitiveTypeCode() == PrimitiveType.BOOLEAN) {
			return ast.newBooleanLiteral(false);
		} else if (primitiveType.getPrimitiveTypeCode() == PrimitiveType.VOID) {
			return null;
		} else {
			return ast.newNumberLiteral("0"); //$NON-NLS-1$
		}
	}
	return ast.newNullLiteral();
}
 

/**
 * @return a statement in form of <code>final int maxLen = 10;</code>
 */
protected VariableDeclarationStatement createMaxLenDeclaration() {
	VariableDeclarationFragment fragment= fAst.newVariableDeclarationFragment();
	fragment.setName(fAst.newSimpleName(fMaxLenVariableName));
	fragment.setInitializer(fAst.newNumberLiteral(String.valueOf(fContext.getLimitItemsValue())));
	VariableDeclarationStatement declExpression= fAst.newVariableDeclarationStatement(fragment);
	declExpression.setType(fAst.newPrimitiveType(PrimitiveType.INT));
	declExpression.modifiers().add(fAst.newModifier(ModifierKeyword.FINAL_KEYWORD));
	return declExpression;
}
 

private Statement createSimpleComparison(IVariableBinding binding) {
	if (isPrimitiveType(binding.getType(), PrimitiveType.FLOAT)) {
		return createReturningIfStatement(createFloatInvocation(getThisAccessForEquals(binding.getName())), createFloatInvocation(getOtherAccess(binding
				.getName())), Operator.NOT_EQUALS, false);
	} else if (isPrimitiveType(binding.getType(), PrimitiveType.DOUBLE)) {
		return createReturningIfStatement(createDoubleInvocation(getThisAccessForEquals(binding.getName())), createDoubleInvocation(getOtherAccess(binding
				.getName())), Operator.NOT_EQUALS, false);
	} else
		return createReturningIfStatement(getThisAccessForEquals(binding.getName()), getOtherAccess(binding.getName()), Operator.NOT_EQUALS, false);
}