下面列出了org.eclipse.jdt.core.dom.ASTNode#PREFIX_EXPRESSION 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
public static char buildLabelForVector(ASTNode node) {
char label = (char) node.getNodeType();
if (node instanceof Expression) {
if (node.getClass().getSimpleName().endsWith("Literal")) {
return (char) (label | (node.toString().hashCode() << 7));
}
int type = node.getNodeType();
switch (type) {
case ASTNode.INFIX_EXPRESSION:
return (char) (label | (((InfixExpression) node).getOperator().toString().hashCode() << 7));
case ASTNode.SIMPLE_NAME:
return (char) (label | (node.toString().hashCode() << 7));
case ASTNode.POSTFIX_EXPRESSION:
return (char) (label | (((PostfixExpression) node).getOperator().toString().hashCode() << 7));
case ASTNode.PREFIX_EXPRESSION:
return (char) (label | (((PrefixExpression) node).getOperator().toString().hashCode() << 7));
default:
break;
}
} else if (node instanceof Modifier) {
return (char) (label | (node.toString().hashCode() << 7));
} else if (node instanceof Type) {
if (node instanceof PrimitiveType)
return (char) (label | (node.toString().hashCode() << 7));
} else if (node instanceof TextElement) {
return (char) (label | (node.toString().hashCode() << 7));
} else if (node instanceof TagElement) {
String tag = ((TagElement) node).getTagName();
if (tag != null)
return (char) (label | (((TagElement) node).getTagName().hashCode() << 7));
}
return label;
}
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 static boolean expressionTypeNeedsParentheses(Expression expression) {
int type= expression.getNodeType();
return type == ASTNode.INFIX_EXPRESSION
|| type == ASTNode.CONDITIONAL_EXPRESSION
|| type == ASTNode.PREFIX_EXPRESSION
|| type == ASTNode.POSTFIX_EXPRESSION
|| type == ASTNode.CAST_EXPRESSION
|| type == ASTNode.INSTANCEOF_EXPRESSION
|| type == ASTNode.ARRAY_CREATION
|| type == ASTNode.ASSIGNMENT;
}
public static boolean isWriteAccess(Name selectedNode) {
ASTNode curr= selectedNode;
ASTNode parent= curr.getParent();
while (parent != null) {
switch (parent.getNodeType()) {
case ASTNode.QUALIFIED_NAME:
if (((QualifiedName) parent).getQualifier() == curr) {
return false;
}
break;
case ASTNode.FIELD_ACCESS:
if (((FieldAccess) parent).getExpression() == curr) {
return false;
}
break;
case ASTNode.SUPER_FIELD_ACCESS:
break;
case ASTNode.ASSIGNMENT:
return ((Assignment) parent).getLeftHandSide() == curr;
case ASTNode.VARIABLE_DECLARATION_FRAGMENT:
case ASTNode.SINGLE_VARIABLE_DECLARATION:
return ((VariableDeclaration) parent).getName() == curr;
case ASTNode.POSTFIX_EXPRESSION:
return true;
case ASTNode.PREFIX_EXPRESSION:
PrefixExpression.Operator op= ((PrefixExpression) parent).getOperator();
return op == PrefixExpression.Operator.DECREMENT || op == PrefixExpression.Operator.INCREMENT;
default:
return false;
}
curr= parent;
parent= curr.getParent();
}
return false;
}
private Expression convert(org.eclipse.jdt.core.dom.Expression expression) {
switch (expression.getNodeType()) {
case ASTNode.ARRAY_ACCESS:
return convert((org.eclipse.jdt.core.dom.ArrayAccess) expression);
case ASTNode.ARRAY_CREATION:
return convert((org.eclipse.jdt.core.dom.ArrayCreation) expression);
case ASTNode.ARRAY_INITIALIZER:
return convert((org.eclipse.jdt.core.dom.ArrayInitializer) expression);
case ASTNode.ASSIGNMENT:
return convert((org.eclipse.jdt.core.dom.Assignment) expression);
case ASTNode.BOOLEAN_LITERAL:
return convert((org.eclipse.jdt.core.dom.BooleanLiteral) expression);
case ASTNode.CAST_EXPRESSION:
return convert((org.eclipse.jdt.core.dom.CastExpression) expression);
case ASTNode.CHARACTER_LITERAL:
return convert((org.eclipse.jdt.core.dom.CharacterLiteral) expression);
case ASTNode.CLASS_INSTANCE_CREATION:
return convert((org.eclipse.jdt.core.dom.ClassInstanceCreation) expression);
case ASTNode.CONDITIONAL_EXPRESSION:
return convert((org.eclipse.jdt.core.dom.ConditionalExpression) expression);
case ASTNode.EXPRESSION_METHOD_REFERENCE:
return convert((org.eclipse.jdt.core.dom.ExpressionMethodReference) expression);
case ASTNode.CREATION_REFERENCE:
return convert((org.eclipse.jdt.core.dom.CreationReference) expression);
case ASTNode.TYPE_METHOD_REFERENCE:
return convert((org.eclipse.jdt.core.dom.TypeMethodReference) expression);
case ASTNode.SUPER_METHOD_REFERENCE:
return convert((org.eclipse.jdt.core.dom.SuperMethodReference) expression);
case ASTNode.FIELD_ACCESS:
return convert((org.eclipse.jdt.core.dom.FieldAccess) expression);
case ASTNode.INFIX_EXPRESSION:
return convert((org.eclipse.jdt.core.dom.InfixExpression) expression);
case ASTNode.INSTANCEOF_EXPRESSION:
return convert((org.eclipse.jdt.core.dom.InstanceofExpression) expression);
case ASTNode.LAMBDA_EXPRESSION:
return convert((org.eclipse.jdt.core.dom.LambdaExpression) expression);
case ASTNode.METHOD_INVOCATION:
return convert((org.eclipse.jdt.core.dom.MethodInvocation) expression);
case ASTNode.NULL_LITERAL:
return NullLiteral.get();
case ASTNode.NUMBER_LITERAL:
return convert((org.eclipse.jdt.core.dom.NumberLiteral) expression);
case ASTNode.PARENTHESIZED_EXPRESSION:
return convert((org.eclipse.jdt.core.dom.ParenthesizedExpression) expression);
case ASTNode.POSTFIX_EXPRESSION:
return convert((org.eclipse.jdt.core.dom.PostfixExpression) expression);
case ASTNode.PREFIX_EXPRESSION:
return convert((org.eclipse.jdt.core.dom.PrefixExpression) expression);
case ASTNode.QUALIFIED_NAME:
return convert((org.eclipse.jdt.core.dom.QualifiedName) expression);
case ASTNode.SIMPLE_NAME:
return convert((org.eclipse.jdt.core.dom.SimpleName) expression);
case ASTNode.STRING_LITERAL:
return convert((org.eclipse.jdt.core.dom.StringLiteral) expression);
case ASTNode.SUPER_FIELD_ACCESS:
return convert((org.eclipse.jdt.core.dom.SuperFieldAccess) expression);
case ASTNode.SUPER_METHOD_INVOCATION:
return convert((org.eclipse.jdt.core.dom.SuperMethodInvocation) expression);
case ASTNode.THIS_EXPRESSION:
return convert((org.eclipse.jdt.core.dom.ThisExpression) expression);
case ASTNode.TYPE_LITERAL:
return convert((org.eclipse.jdt.core.dom.TypeLiteral) expression);
case ASTNode.VARIABLE_DECLARATION_EXPRESSION:
return convert((org.eclipse.jdt.core.dom.VariableDeclarationExpression) expression);
default:
throw internalCompilerError(
"Unexpected type for Expression: %s", expression.getClass().getName());
}
}
private void parseExpression(MethodInfo methodInfo, Expression expression) {
if (expression == null) {
return;
}//System.out.println(expression.toString()+" "+Annotation.nodeClassForType(expression.getNodeType()));
if (expression.getNodeType() == ASTNode.ARRAY_INITIALIZER) {
List<Expression> expressions = ((ArrayInitializer) expression).expressions();
for (Expression expression2 : expressions) {
parseExpression(methodInfo, expression2);
}
}
if (expression.getNodeType() == ASTNode.CAST_EXPRESSION) {
parseExpression(methodInfo, ((CastExpression) expression).getExpression());
}
if (expression.getNodeType() == ASTNode.CONDITIONAL_EXPRESSION) {
parseExpression(methodInfo, ((ConditionalExpression) expression).getExpression());
parseExpression(methodInfo, ((ConditionalExpression) expression).getElseExpression());
parseExpression(methodInfo, ((ConditionalExpression) expression).getThenExpression());
}
if (expression.getNodeType() == ASTNode.INFIX_EXPRESSION) {
parseExpression(methodInfo, ((InfixExpression) expression).getLeftOperand());
parseExpression(methodInfo, ((InfixExpression) expression).getRightOperand());
}
if (expression.getNodeType() == ASTNode.INSTANCEOF_EXPRESSION) {
parseExpression(methodInfo, ((InstanceofExpression) expression).getLeftOperand());
}
if (expression.getNodeType() == ASTNode.PARENTHESIZED_EXPRESSION) {
parseExpression(methodInfo, ((ParenthesizedExpression) expression).getExpression());
}
if (expression.getNodeType() == ASTNode.POSTFIX_EXPRESSION) {
parseExpression(methodInfo, ((PostfixExpression) expression).getOperand());
}
if (expression.getNodeType() == ASTNode.PREFIX_EXPRESSION) {
parseExpression(methodInfo, ((PrefixExpression) expression).getOperand());
}
if (expression.getNodeType() == ASTNode.THIS_EXPRESSION) {
parseExpression(methodInfo, ((ThisExpression) expression).getQualifier());
}
if (expression.getNodeType() == ASTNode.METHOD_INVOCATION) {
List<Expression> arguments = ((MethodInvocation) expression).arguments();
IMethodBinding methodBinding = ((MethodInvocation) expression).resolveMethodBinding();
if (methodBinding != null)
methodInfo.methodCalls.add(methodBinding);
for (Expression exp : arguments)
parseExpression(methodInfo, exp);
parseExpression(methodInfo, ((MethodInvocation) expression).getExpression());
}
if (expression.getNodeType() == ASTNode.ASSIGNMENT) {
parseExpression(methodInfo, ((Assignment) expression).getLeftHandSide());
parseExpression(methodInfo, ((Assignment) expression).getRightHandSide());
}
if (expression.getNodeType() == ASTNode.QUALIFIED_NAME) {
if (((QualifiedName) expression).getQualifier().resolveTypeBinding() != null) {
String name = ((QualifiedName) expression).getQualifier().resolveTypeBinding().getQualifiedName() + "." + ((QualifiedName) expression).getName().getIdentifier();
methodInfo.fieldUsesSet.add(name);
}
parseExpression(methodInfo, ((QualifiedName) expression).getQualifier());
}
}
/**
* Resolve the binding (<em>not</em> the type binding) for the expression or a nested expression
* (e.g. nested in parentheses, cast, ...).
*
* @param expression an expression node
* @param goIntoCast iff <code>true</code>, go into a CastExpression's expression to resolve
* @return the expression binding, or <code>null</code> if the expression has no binding or the
* binding could not be resolved
*
* @see StubUtility#getVariableNameSuggestions(int, IJavaProject, ITypeBinding, Expression, java.util.Collection)
* @since 3.5
*/
public static IBinding resolveExpressionBinding(Expression expression, boolean goIntoCast) {
//TODO: search for callers of resolve*Binding() methods and replace with call to this method
// similar to StubUtility#getVariableNameSuggestions(int, IJavaProject, ITypeBinding, Expression, Collection)
switch (expression.getNodeType()) {
case ASTNode.SIMPLE_NAME:
case ASTNode.QUALIFIED_NAME:
return ((Name) expression).resolveBinding();
case ASTNode.FIELD_ACCESS:
return ((FieldAccess) expression).resolveFieldBinding();
case ASTNode.SUPER_FIELD_ACCESS:
return ((SuperFieldAccess) expression).resolveFieldBinding();
case ASTNode.METHOD_INVOCATION:
return ((MethodInvocation) expression).resolveMethodBinding();
case ASTNode.SUPER_METHOD_INVOCATION:
return ((SuperMethodInvocation) expression).resolveMethodBinding();
case ASTNode.CLASS_INSTANCE_CREATION:
return ((ClassInstanceCreation) expression).resolveConstructorBinding();
case ASTNode.MARKER_ANNOTATION:
case ASTNode.SINGLE_MEMBER_ANNOTATION:
case ASTNode.NORMAL_ANNOTATION:
return ((Annotation) expression).resolveAnnotationBinding();
case ASTNode.ARRAY_ACCESS:
return resolveExpressionBinding(((ArrayAccess) expression).getArray(), goIntoCast);
case ASTNode.CAST_EXPRESSION:
if (goIntoCast) {
return resolveExpressionBinding(((CastExpression) expression).getExpression(), true);
} else {
return null;
}
case ASTNode.PARENTHESIZED_EXPRESSION:
return resolveExpressionBinding(((ParenthesizedExpression) expression).getExpression(), goIntoCast);
case ASTNode.PREFIX_EXPRESSION:
return resolveExpressionBinding(((PrefixExpression) expression).getOperand(), goIntoCast);
case ASTNode.POSTFIX_EXPRESSION:
return resolveExpressionBinding(((PostfixExpression) expression).getOperand(), goIntoCast);
default:
return null;
}
}
/**
* Converts an assignment, postfix expression or prefix expression into an assignable equivalent expression using the getter.
*
* @param node the assignment/prefix/postfix node
* @param astRewrite the astRewrite to use
* @param getterExpression the expression to insert for read accesses or <code>null</code> if such an expression does not exist
* @param variableType the type of the variable that the result will be assigned to
* @param is50OrHigher <code>true</code> if a 5.0 or higher environment can be used
* @return an expression that can be assigned to the type variableType with node being replaced by a equivalent expression using the getter
*/
public static Expression getAssignedValue(ASTNode node, ASTRewrite astRewrite, Expression getterExpression, ITypeBinding variableType, boolean is50OrHigher) {
InfixExpression.Operator op= null;
AST ast= astRewrite.getAST();
if (isNotInBlock(node))
return null;
if (node.getNodeType() == ASTNode.ASSIGNMENT) {
Assignment assignment= ((Assignment) node);
Expression rightHandSide= assignment.getRightHandSide();
Expression copiedRightOp= (Expression) astRewrite.createCopyTarget(rightHandSide);
if (assignment.getOperator() == Operator.ASSIGN) {
ITypeBinding rightHandSideType= rightHandSide.resolveTypeBinding();
copiedRightOp= createNarrowCastIfNessecary(copiedRightOp, rightHandSideType, ast, variableType, is50OrHigher);
return copiedRightOp;
}
if (getterExpression != null) {
InfixExpression infix= ast.newInfixExpression();
infix.setLeftOperand(getterExpression);
infix.setOperator(ASTNodes.convertToInfixOperator(assignment.getOperator()));
ITypeBinding infixType= infix.resolveTypeBinding();
if (NecessaryParenthesesChecker.needsParenthesesForRightOperand(rightHandSide, infix, variableType)) {
ParenthesizedExpression p= ast.newParenthesizedExpression();
p.setExpression(copiedRightOp);
copiedRightOp= p;
}
infix.setRightOperand(copiedRightOp);
return createNarrowCastIfNessecary(infix, infixType, ast, variableType, is50OrHigher);
}
} else if (node.getNodeType() == ASTNode.POSTFIX_EXPRESSION) {
PostfixExpression po= (PostfixExpression) node;
if (po.getOperator() == PostfixExpression.Operator.INCREMENT)
op= InfixExpression.Operator.PLUS;
if (po.getOperator() == PostfixExpression.Operator.DECREMENT)
op= InfixExpression.Operator.MINUS;
} else if (node.getNodeType() == ASTNode.PREFIX_EXPRESSION) {
PrefixExpression pe= (PrefixExpression) node;
if (pe.getOperator() == PrefixExpression.Operator.INCREMENT)
op= InfixExpression.Operator.PLUS;
if (pe.getOperator() == PrefixExpression.Operator.DECREMENT)
op= InfixExpression.Operator.MINUS;
}
if (op != null && getterExpression != null) {
return createInfixInvocationFromPostPrefixExpression(op, getterExpression, ast, variableType, is50OrHigher);
}
return null;
}
/**
* Remove the field or variable declaration including the initializer.
* @param rewrite the AST rewriter to use
* @param reference a reference to the variable to remove
* @param group the text edit group to use
*/
private void removeVariableReferences(ASTRewrite rewrite, SimpleName reference, TextEditGroup group) {
ASTNode parent= reference.getParent();
while (parent instanceof QualifiedName) {
parent= parent.getParent();
}
if (parent instanceof FieldAccess) {
parent= parent.getParent();
}
int nameParentType= parent.getNodeType();
if (nameParentType == ASTNode.ASSIGNMENT) {
Assignment assignment= (Assignment) parent;
Expression rightHand= assignment.getRightHandSide();
ASTNode assignParent= assignment.getParent();
if (assignParent.getNodeType() == ASTNode.EXPRESSION_STATEMENT && rightHand.getNodeType() != ASTNode.ASSIGNMENT) {
removeVariableWithInitializer(rewrite, rightHand, assignParent, group);
} else {
rewrite.replace(assignment, rewrite.createCopyTarget(rightHand), group);
}
} else if (nameParentType == ASTNode.SINGLE_VARIABLE_DECLARATION) {
rewrite.remove(parent, group);
} else if (nameParentType == ASTNode.VARIABLE_DECLARATION_FRAGMENT) {
VariableDeclarationFragment frag= (VariableDeclarationFragment) parent;
ASTNode varDecl= frag.getParent();
List<VariableDeclarationFragment> fragments;
if (varDecl instanceof VariableDeclarationExpression) {
fragments= ((VariableDeclarationExpression) varDecl).fragments();
} else if (varDecl instanceof FieldDeclaration) {
fragments= ((FieldDeclaration) varDecl).fragments();
} else {
fragments= ((VariableDeclarationStatement) varDecl).fragments();
}
Expression initializer = frag.getInitializer();
ArrayList<Expression> sideEffects= new ArrayList<Expression>();
if (initializer != null) {
initializer.accept(new SideEffectFinder(sideEffects));
}
boolean sideEffectInitializer= sideEffects.size() > 0;
if (fragments.size() == fUnusedNames.length) {
if (fForceRemove) {
rewrite.remove(varDecl, group);
return;
}
if (parent.getParent() instanceof FieldDeclaration) {
rewrite.remove(varDecl, group);
return;
}
if (sideEffectInitializer) {
Statement[] wrapped= new Statement[sideEffects.size()];
for (int i= 0; i < wrapped.length; i++) {
Expression sideEffect= sideEffects.get(i);
Expression movedInit= (Expression) rewrite.createMoveTarget(sideEffect);
wrapped[i]= rewrite.getAST().newExpressionStatement(movedInit);
}
StatementRewrite statementRewrite= new StatementRewrite(rewrite, new ASTNode[] { varDecl });
statementRewrite.replace(wrapped, group);
} else {
rewrite.remove(varDecl, group);
}
} else {
if (fForceRemove) {
rewrite.remove(frag, group);
return;
}
//multiple declarations in one line
ASTNode declaration = parent.getParent();
if (declaration instanceof FieldDeclaration) {
rewrite.remove(frag, group);
return;
}
if (declaration instanceof VariableDeclarationStatement) {
splitUpDeclarations(rewrite, group, frag, (VariableDeclarationStatement) declaration, sideEffects);
rewrite.remove(frag, group);
return;
}
if (declaration instanceof VariableDeclarationExpression) {
//keep constructors and method invocations
if (!sideEffectInitializer){
rewrite.remove(frag, group);
}
}
}
} else if (nameParentType == ASTNode.POSTFIX_EXPRESSION || nameParentType == ASTNode.PREFIX_EXPRESSION) {
Expression expression= (Expression)parent;
ASTNode expressionParent= expression.getParent();
if (expressionParent.getNodeType() == ASTNode.EXPRESSION_STATEMENT) {
removeStatement(rewrite, expressionParent, group);
} else {
rewrite.remove(expression, group);
}
}
}