下面列出了org.eclipse.jdt.core.dom.ExpressionStatement#getExpression ( ) 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。
private IExpressionFragment getSelectedExpression() throws JavaModelException {
if (fSelectedExpression != null) {
return fSelectedExpression;
}
IASTFragment selectedFragment = ASTFragmentFactory.createFragmentForSourceRange(new SourceRange(fSelectionStart, fSelectionLength), fCompilationUnitNode, fCu);
if (selectedFragment instanceof IExpressionFragment && !Checks.isInsideJavadoc(selectedFragment.getAssociatedNode())) {
fSelectedExpression = (IExpressionFragment) selectedFragment;
} else if (selectedFragment != null) {
if (selectedFragment.getAssociatedNode() instanceof ExpressionStatement) {
ExpressionStatement exprStatement = (ExpressionStatement) selectedFragment.getAssociatedNode();
Expression expression = exprStatement.getExpression();
fSelectedExpression = (IExpressionFragment) ASTFragmentFactory.createFragmentForFullSubtree(expression);
} else if (selectedFragment.getAssociatedNode() instanceof Assignment) {
Assignment assignment = (Assignment) selectedFragment.getAssociatedNode();
fSelectedExpression = (IExpressionFragment) ASTFragmentFactory.createFragmentForFullSubtree(assignment);
}
}
if (fSelectedExpression != null && Checks.isEnumCase(fSelectedExpression.getAssociatedExpression().getParent())) {
fSelectedExpression = null;
}
return fSelectedExpression;
}
private IExpressionFragment getSelectedExpression() throws JavaModelException {
if (fSelectedExpression != null) {
return fSelectedExpression;
}
IASTFragment selectedFragment = ASTFragmentFactory.createFragmentForSourceRange(new SourceRange(fSelectionStart, fSelectionLength), fCompilationUnitNode, fCu);
if (selectedFragment instanceof IExpressionFragment && !Checks.isInsideJavadoc(selectedFragment.getAssociatedNode())) {
fSelectedExpression = (IExpressionFragment) selectedFragment;
} else if (selectedFragment != null) {
if (selectedFragment.getAssociatedNode() instanceof ExpressionStatement) {
ExpressionStatement exprStatement = (ExpressionStatement) selectedFragment.getAssociatedNode();
Expression expression = exprStatement.getExpression();
fSelectedExpression = (IExpressionFragment) ASTFragmentFactory.createFragmentForFullSubtree(expression);
} else if (selectedFragment.getAssociatedNode() instanceof Assignment) {
Assignment assignment = (Assignment) selectedFragment.getAssociatedNode();
fSelectedExpression = (IExpressionFragment) ASTFragmentFactory.createFragmentForFullSubtree(assignment);
}
}
if (fSelectedExpression != null && Checks.isEnumCase(fSelectedExpression.getAssociatedExpression().getParent())) {
fSelectedExpression = null;
}
return fSelectedExpression;
}
private IExpressionFragment getSelectedExpression() throws JavaModelException {
if (fSelectedExpression != null)
return fSelectedExpression;
IASTFragment selectedFragment= ASTFragmentFactory.createFragmentForSourceRange(new SourceRange(fSelectionStart, fSelectionLength), fCompilationUnitNode, fCu);
if (selectedFragment instanceof IExpressionFragment && !Checks.isInsideJavadoc(selectedFragment.getAssociatedNode())) {
fSelectedExpression= (IExpressionFragment) selectedFragment;
} else if (selectedFragment != null) {
if (selectedFragment.getAssociatedNode() instanceof ExpressionStatement) {
ExpressionStatement exprStatement= (ExpressionStatement) selectedFragment.getAssociatedNode();
Expression expression= exprStatement.getExpression();
fSelectedExpression= (IExpressionFragment) ASTFragmentFactory.createFragmentForFullSubtree(expression);
} else if (selectedFragment.getAssociatedNode() instanceof Assignment) {
Assignment assignment= (Assignment) selectedFragment.getAssociatedNode();
fSelectedExpression= (IExpressionFragment) ASTFragmentFactory.createFragmentForFullSubtree(assignment);
}
}
if (fSelectedExpression != null && Checks.isEnumCase(fSelectedExpression.getAssociatedExpression().getParent())) {
fSelectedExpression= null;
}
return fSelectedExpression;
}
public FieldInstructionObject isSetter() {
if(getMethodBody() != null) {
List<AbstractStatement> abstractStatements = getMethodBody().getCompositeStatement().getStatements();
if(abstractStatements.size() == 1 && abstractStatements.get(0) instanceof StatementObject) {
StatementObject statementObject = (StatementObject)abstractStatements.get(0);
Statement statement = statementObject.getStatement();
if(statement instanceof ExpressionStatement) {
ExpressionStatement expressionStatement = (ExpressionStatement)statement;
if(expressionStatement.getExpression() instanceof Assignment && statementObject.getFieldInstructions().size() == 1 && statementObject.getMethodInvocations().size() == 0 &&
statementObject.getLocalVariableDeclarations().size() == 0 && statementObject.getLocalVariableInstructions().size() == 1 && this.constructorObject.parameterList.size() == 1) {
Assignment assignment = (Assignment)expressionStatement.getExpression();
if((assignment.getLeftHandSide() instanceof SimpleName || assignment.getLeftHandSide() instanceof FieldAccess) && assignment.getRightHandSide() instanceof SimpleName)
return statementObject.getFieldInstructions().get(0);
}
}
}
}
return null;
}
public static CUCorrectionProposal getAssignVariableProposal(CodeActionParams params, IInvocationContext context, boolean problemsAtLocation, Map formatterOptions, boolean returnAsCommand,
IProblemLocationCore[] locations)
throws CoreException {
ASTNode node = context.getCoveringNode();
Statement statement = ASTResolving.findParentStatement(node);
if (!(statement instanceof ExpressionStatement)) {
return null;
}
ExpressionStatement expressionStatement = (ExpressionStatement) statement;
Expression expression = expressionStatement.getExpression();
if (expression.getNodeType() == ASTNode.ASSIGNMENT) {
return null;
}
ITypeBinding typeBinding = expression.resolveTypeBinding();
typeBinding = Bindings.normalizeTypeBinding(typeBinding);
if (typeBinding == null) {
return null;
}
if (containsMatchingProblem(locations, IProblem.UnusedObjectAllocation)) {
return null;
}
final ICompilationUnit cu = context.getCompilationUnit();
int relevance;
if (context.getSelectionLength() == 0) {
relevance = IProposalRelevance.EXTRACT_LOCAL_ZERO_SELECTION;
} else if (problemsAtLocation) {
relevance = IProposalRelevance.EXTRACT_LOCAL_ERROR;
} else {
relevance = IProposalRelevance.EXTRACT_LOCAL;
}
if (returnAsCommand) {
return new AssignToVariableAssistCommandProposal(cu, JavaCodeActionKind.REFACTOR_ASSIGN_VARIABLE, AssignToVariableAssistProposal.LOCAL, expressionStatement, typeBinding, relevance, APPLY_REFACTORING_COMMAND_ID,
Arrays.asList(ASSIGN_VARIABLE_COMMAND, params));
} else {
return new AssignToVariableAssistProposal(cu, JavaCodeActionKind.REFACTOR_ASSIGN_VARIABLE, AssignToVariableAssistProposal.LOCAL, expressionStatement, typeBinding, relevance);
}
}
public static CUCorrectionProposal getAssignFieldProposal(CodeActionParams params, IInvocationContext context, boolean problemsAtLocation, Map formatterOptions, boolean returnAsCommand,
IProblemLocationCore[] locations) throws CoreException {
ASTNode node = context.getCoveringNode();
Statement statement = ASTResolving.findParentStatement(node);
if (!(statement instanceof ExpressionStatement)) {
return null;
}
ExpressionStatement expressionStatement = (ExpressionStatement) statement;
Expression expression = expressionStatement.getExpression();
if (expression.getNodeType() == ASTNode.ASSIGNMENT) {
return null;
}
ITypeBinding typeBinding = expression.resolveTypeBinding();
typeBinding = Bindings.normalizeTypeBinding(typeBinding);
if (typeBinding == null) {
return null;
}
if (containsMatchingProblem(locations, IProblem.UnusedObjectAllocation)) {
return null;
}
final ICompilationUnit cu = context.getCompilationUnit();
ASTNode type = ASTResolving.findParentType(expression);
if (type != null) {
int relevance;
if (context.getSelectionLength() == 0) {
relevance = IProposalRelevance.EXTRACT_LOCAL_ZERO_SELECTION;
} else if (problemsAtLocation) {
relevance = IProposalRelevance.EXTRACT_LOCAL_ERROR;
} else {
relevance = IProposalRelevance.EXTRACT_LOCAL;
}
if (returnAsCommand) {
return new AssignToVariableAssistCommandProposal(cu, JavaCodeActionKind.REFACTOR_ASSIGN_FIELD, AssignToVariableAssistProposal.FIELD, expressionStatement, typeBinding, relevance, APPLY_REFACTORING_COMMAND_ID,
Arrays.asList(ASSIGN_FIELD_COMMAND, params));
} else {
return new AssignToVariableAssistProposal(cu, JavaCodeActionKind.REFACTOR_ASSIGN_FIELD, AssignToVariableAssistProposal.FIELD, expressionStatement, typeBinding, relevance);
}
}
return null;
}
private boolean isAssigned(Statement statement, SimpleName name) {
if (statement instanceof ExpressionStatement) {
ExpressionStatement exstat= (ExpressionStatement) statement;
if (exstat.getExpression() instanceof Assignment) {
Assignment assignment= (Assignment) exstat.getExpression();
return assignment.getLeftHandSide() == name;
}
}
return false;
}
public static boolean getAssignToVariableProposals(IInvocationContext context, ASTNode node, IProblemLocation[] locations, Collection<ICommandAccess> resultingCollections) {
Statement statement= ASTResolving.findParentStatement(node);
if (!(statement instanceof ExpressionStatement)) {
return false;
}
ExpressionStatement expressionStatement= (ExpressionStatement) statement;
Expression expression= expressionStatement.getExpression();
if (expression.getNodeType() == ASTNode.ASSIGNMENT) {
return false; // too confusing and not helpful
}
ITypeBinding typeBinding= expression.resolveTypeBinding();
typeBinding= Bindings.normalizeTypeBinding(typeBinding);
if (typeBinding == null) {
return false;
}
if (resultingCollections == null) {
return true;
}
// don't add if already added as quick fix
if (containsMatchingProblem(locations, IProblem.UnusedObjectAllocation))
return false;
ICompilationUnit cu= context.getCompilationUnit();
AssignToVariableAssistProposal localProposal= new AssignToVariableAssistProposal(cu, AssignToVariableAssistProposal.LOCAL, expressionStatement, typeBinding, IProposalRelevance.ASSIGN_TO_LOCAL);
localProposal.setCommandId(ASSIGN_TO_LOCAL_ID);
resultingCollections.add(localProposal);
ASTNode type= ASTResolving.findParentType(expression);
if (type != null) {
AssignToVariableAssistProposal fieldProposal= new AssignToVariableAssistProposal(cu, AssignToVariableAssistProposal.FIELD, expressionStatement, typeBinding, IProposalRelevance.ASSIGN_TO_FIELD);
fieldProposal.setCommandId(ASSIGN_TO_FIELD_ID);
resultingCollections.add(fieldProposal);
}
return true;
}
private static ITypeBinding extractExpressionType(ExpressionStatement statement) {
Expression expression= statement.getExpression();
if (expression.getNodeType() == ASTNode.METHOD_INVOCATION
|| expression.getNodeType() == ASTNode.FIELD_ACCESS) {
return expression.resolveTypeBinding();
}
return null;
}
private boolean isAssigned(Statement statement, SimpleName name) {
if (statement instanceof ExpressionStatement) {
ExpressionStatement exstat= (ExpressionStatement) statement;
if (exstat.getExpression() instanceof Assignment) {
Assignment assignment= (Assignment) exstat.getExpression();
return assignment.getLeftHandSide() == name;
}
}
return false;
}
public static SimpleName isSetter(MethodDeclaration methodDeclaration) {
Block methodBody = methodDeclaration.getBody();
List<SingleVariableDeclaration> parameters = methodDeclaration.parameters();
if(methodBody != null) {
List<Statement> statements = methodBody.statements();
if(statements.size() == 1 && parameters.size() == 1) {
Statement statement = statements.get(0);
if(statement instanceof ExpressionStatement) {
ExpressionStatement expressionStatement = (ExpressionStatement)statement;
Expression expressionStatementExpression = expressionStatement.getExpression();
if(expressionStatementExpression instanceof Assignment) {
Assignment assignment = (Assignment)expressionStatementExpression;
Expression rightHandSide = assignment.getRightHandSide();
if(rightHandSide instanceof SimpleName) {
SimpleName rightHandSideSimpleName = (SimpleName)rightHandSide;
if(rightHandSideSimpleName.resolveBinding().isEqualTo(parameters.get(0).resolveBinding())) {
Expression leftHandSide = assignment.getLeftHandSide();
if(leftHandSide instanceof SimpleName) {
return (SimpleName)leftHandSide;
}
else if(leftHandSide instanceof FieldAccess) {
FieldAccess fieldAccess = (FieldAccess)leftHandSide;
return fieldAccess.getName();
}
}
}
}
}
}
}
return null;
}
public boolean match(ExpressionStatement node, Object other) {
if (AbstractControlStructureUtilities.hasOneConditionalExpression(node) != null && other instanceof IfStatement)
{
TernaryControlStructure nodeTernaryControlStructure = new TernaryControlStructure(node);
return ifMatch(nodeTernaryControlStructure, other);
}
else if(node.getExpression() instanceof Assignment && other instanceof VariableDeclarationStatement) {
VariableDeclarationStatement variableDeclarationStatement = (VariableDeclarationStatement)other;
List fragments = variableDeclarationStatement.fragments();
if(fragments.size() == 1) {
VariableDeclarationFragment fragment = (VariableDeclarationFragment)fragments.get(0);
Assignment assignment = (Assignment)node.getExpression();
Expression leftHandSide = assignment.getLeftHandSide();
if(leftHandSide instanceof SimpleName) {
SimpleName simpleName = (SimpleName)leftHandSide;
boolean variableMatch = safeSubtreeMatch(simpleName, fragment.getName());
boolean variableTypeMatch = false;
IBinding simpleNameBinding = simpleName.resolveBinding();
IBinding fragmentNameBinding = fragment.getName().resolveBinding();
if(simpleNameBinding.getKind() == IBinding.VARIABLE && fragmentNameBinding.getKind() == IBinding.VARIABLE) {
IVariableBinding simpleNameVariableBinding = (IVariableBinding)simpleNameBinding;
IVariableBinding fragmentNameVariableBinding = (IVariableBinding)fragmentNameBinding;
variableTypeMatch = simpleNameVariableBinding.getType().isEqualTo(fragmentNameVariableBinding.getType()) &&
simpleNameVariableBinding.getType().getQualifiedName().equals(fragmentNameVariableBinding.getType().getQualifiedName());
}
boolean initializerMatch = false;
boolean initializerTypeMatch = false;
Expression initializer = fragment.getInitializer();
Expression rightHandSide = assignment.getRightHandSide();
if(initializer != null && initializer.getNodeType() == rightHandSide.getNodeType()) {
initializerMatch = safeSubtreeMatch(rightHandSide, initializer);
initializerTypeMatch = initializer.resolveTypeBinding().isEqualTo(rightHandSide.resolveTypeBinding()) &&
initializer.resolveTypeBinding().getQualifiedName().equals(rightHandSide.resolveTypeBinding().getQualifiedName());
}
if(variableMatch && variableTypeMatch && initializerMatch && initializerTypeMatch) {
VariableDeclaration variableDeclaration = AbstractLoopUtilities.getVariableDeclaration(simpleName);
if(variableDeclaration != null && hasEmptyInitializer(variableDeclaration)) {
safeSubtreeMatch(variableDeclaration.getName(), fragment.getName());
List<ASTNode> astNodes = new ArrayList<ASTNode>();
astNodes.add(variableDeclaration);
ASTInformationGenerator.setCurrentITypeRoot(typeRoot1);
reportAdditionalFragments(astNodes, this.additionallyMatchedFragments1);
return true;
}
}
}
}
}
return super.match(node, other);
}
public boolean match(VariableDeclarationStatement node, Object other) {
List fragments = node.fragments();
if(fragments.size() == 1 && other instanceof ExpressionStatement) {
VariableDeclarationFragment fragment = (VariableDeclarationFragment)fragments.get(0);
ExpressionStatement expressionStatement = (ExpressionStatement)other;
Expression expression = expressionStatement.getExpression();
if(expression instanceof Assignment) {
Assignment assignment = (Assignment)expression;
Expression leftHandSide = assignment.getLeftHandSide();
if(leftHandSide instanceof SimpleName) {
SimpleName simpleName = (SimpleName)leftHandSide;
boolean variableMatch = safeSubtreeMatch(fragment.getName(), simpleName);
boolean variableTypeMatch = false;
IBinding simpleNameBinding = simpleName.resolveBinding();
IBinding fragmentNameBinding = fragment.getName().resolveBinding();
if(simpleNameBinding.getKind() == IBinding.VARIABLE && fragmentNameBinding.getKind() == IBinding.VARIABLE) {
IVariableBinding simpleNameVariableBinding = (IVariableBinding)simpleNameBinding;
IVariableBinding fragmentNameVariableBinding = (IVariableBinding)fragmentNameBinding;
variableTypeMatch = simpleNameVariableBinding.getType().isEqualTo(fragmentNameVariableBinding.getType()) &&
simpleNameVariableBinding.getType().getQualifiedName().equals(fragmentNameVariableBinding.getType().getQualifiedName());;
}
boolean initializerMatch = false;
boolean initializerTypeMatch = false;
Expression initializer = fragment.getInitializer();
Expression rightHandSide = assignment.getRightHandSide();
if(initializer != null && initializer.getNodeType() == rightHandSide.getNodeType()) {
initializerMatch = safeSubtreeMatch(initializer, rightHandSide);
initializerTypeMatch = initializer.resolveTypeBinding().isEqualTo(rightHandSide.resolveTypeBinding()) &&
initializer.resolveTypeBinding().getQualifiedName().equals(rightHandSide.resolveTypeBinding().getQualifiedName());
}
if(variableMatch && variableTypeMatch && initializerMatch && initializerTypeMatch) {
VariableDeclaration variableDeclaration = AbstractLoopUtilities.getVariableDeclaration(simpleName);
if(variableDeclaration != null && hasEmptyInitializer(variableDeclaration)) {
safeSubtreeMatch(fragment.getName(), variableDeclaration.getName());
List<ASTNode> astNodes = new ArrayList<ASTNode>();
astNodes.add(variableDeclaration);
ASTInformationGenerator.setCurrentITypeRoot(typeRoot2);
reportAdditionalFragments(astNodes, this.additionallyMatchedFragments2);
return true;
}
}
}
}
}
return super.match(node, other);
}