private TypeBinding getTypeFromSignature(String typeSignature, Scope scope) {
TypeBinding assignableTypeBinding = null;
TypeVariableBinding[] typeVariables = Binding.NO_TYPE_VARIABLES;
ReferenceContext referenceContext = scope.referenceContext();
if (referenceContext instanceof AbstractMethodDeclaration) {
AbstractMethodDeclaration methodDeclaration = (AbstractMethodDeclaration) referenceContext;
TypeParameter[] typeParameters = methodDeclaration.typeParameters();
if (typeParameters != null && typeParameters.length > 0) {
int length = typeParameters.length;
int count = 0;
typeVariables = new TypeVariableBinding[length];
for (int i = 0; i < length; i++) {
if (typeParameters[i].binding != null) {
typeVariables[count++] = typeParameters[i].binding;
}
}
if (count != length) {
System.arraycopy(
typeVariables, 0, typeVariables = new TypeVariableBinding[count], 0, count);
}
}
}
CompilationUnitDeclaration previousUnitBeingCompleted =
this.lookupEnvironment.unitBeingCompleted;
this.lookupEnvironment.unitBeingCompleted = this.compilationUnitDeclaration;
// {ObjectTeams: protect call into the compiler
/* orig:
try {
:giro */
try (Config config =
Dependencies.setup(this, this.parser, this.lookupEnvironment, true, true)) {
// orig:
SignatureWrapper wrapper =
new SignatureWrapper(replacePackagesDot(typeSignature.toCharArray()));
// FIXME(stephan): do we interpret type annotations here?
assignableTypeBinding =
this.lookupEnvironment.getTypeFromTypeSignature(
wrapper,
typeVariables,
this.assistScope.enclosingClassScope().referenceContext.binding,
null,
ITypeAnnotationWalker.EMPTY_ANNOTATION_WALKER);
assignableTypeBinding =
BinaryTypeBinding.resolveType(assignableTypeBinding, this.lookupEnvironment, true);
} catch (AbortCompilation e) {
assignableTypeBinding = null;
} finally {
this.lookupEnvironment.unitBeingCompleted = previousUnitBeingCompleted;
}
return assignableTypeBinding;
}
public boolean canUseDiamond(String[] parameterTypes, char[] fullyQualifiedTypeName) {
TypeBinding guessedType = null;
char[][] cn = CharOperation.splitOn('.', fullyQualifiedTypeName);
Scope scope = this.assistScope;
if (scope.compilerOptions().sourceLevel < ClassFileConstants.JDK1_7) return false;
// If no LHS or return type expected, then we can safely use diamond
char[][] expectedTypekeys = this.completionContext.getExpectedTypesKeys();
if (expectedTypekeys == null || expectedTypekeys.length == 0) return true;
// Next, find out whether any of the constructor parameters are the same as one of the
// class type variables. If yes, diamond cannot be used.
TypeReference ref;
if (cn.length == 1) {
ref = new SingleTypeReference(cn[0], 0);
} else {
ref = new QualifiedTypeReference(cn, new long[cn.length]);
}
// {ObjectTeams: protect call into the compiler
try (Config config =
Dependencies.setup(this, this.parser, this.lookupEnvironment, true, true)) {
// orig:
switch (scope.kind) {
case Scope.METHOD_SCOPE:
case Scope.BLOCK_SCOPE:
guessedType = ref.resolveType((BlockScope) scope);
break;
case Scope.CLASS_SCOPE:
guessedType = ref.resolveType((ClassScope) scope);
break;
}
// :giro
}
// SH}
if (guessedType != null && guessedType.isValidBinding()) {
// the erasure must be used because guessedType can be a RawTypeBinding
guessedType = guessedType.erasure();
TypeVariableBinding[] typeVars = guessedType.typeVariables();
for (int i = 0; i < parameterTypes.length; i++) {
for (int j = 0; j < typeVars.length; j++) {
if (CharOperation.equals(parameterTypes[i].toCharArray(), typeVars[j].sourceName))
return false;
}
}
return true;
}
return false;
}
public IJavaElement[] getVisibleElements(String typeSignature) {
// {ObjectTeams: might call into the compiler (e.g., isCompatibleWith), so give at least minimal
// protection:
try (Config config =
Dependencies.setup(this, this.parser, this.lookupEnvironment, true, true)) {
// SH}
if (this.assistScope == null) return new IJavaElement[0];
if (!this.hasComputedVisibleElementBindings) {
computeVisibleElementBindings();
}
TypeBinding assignableTypeBinding = null;
if (typeSignature != null) {
assignableTypeBinding = getTypeFromSignature(typeSignature, this.assistScope);
if (assignableTypeBinding == null) return new IJavaElement[0];
}
int length =
this.visibleLocalVariables.size()
+ this.visibleFields.size()
+ this.visibleMethods.size();
if (length == 0) return new IJavaElement[0];
IJavaElement[] result = new IJavaElement[length];
int elementCount = 0;
int size = this.visibleLocalVariables.size();
if (size > 0) {
next:
for (int i = 0; i < size; i++) {
try {
LocalVariableBinding binding =
(LocalVariableBinding) this.visibleLocalVariables.elementAt(i);
if (binding.type == null
|| (assignableTypeBinding != null
&& !binding.type.isCompatibleWith(assignableTypeBinding))) continue next;
JavaElement localVariable = getJavaElement(binding);
if (localVariable != null) result[elementCount++] = localVariable;
} catch (AbortCompilation e) {
// log the exception and proceed
Util.logRepeatedMessage(e.getKey(), e);
}
}
}
size = this.visibleFields.size();
if (size > 0) {
next:
for (int i = 0; i < size; i++) {
try {
FieldBinding binding = (FieldBinding) this.visibleFields.elementAt(i);
if (assignableTypeBinding != null
&& !binding.type.isCompatibleWith(assignableTypeBinding)) continue next;
if (this.assistScope.isDefinedInSameUnit(binding.declaringClass)) {
JavaElement field = getJavaElementOfCompilationUnit(binding);
if (field != null) result[elementCount++] = field;
} else {
JavaElement field = Util.getUnresolvedJavaElement(binding, this.owner, EmptyNodeMap);
if (field != null) result[elementCount++] = field.resolved(binding);
}
} catch (AbortCompilation e) {
// log the exception and proceed
Util.logRepeatedMessage(e.getKey(), e);
}
}
}
size = this.visibleMethods.size();
if (size > 0) {
next:
for (int i = 0; i < size; i++) {
try {
MethodBinding binding = (MethodBinding) this.visibleMethods.elementAt(i);
if (assignableTypeBinding != null
&& !binding.returnType.isCompatibleWith(assignableTypeBinding)) continue next;
if (this.assistScope.isDefinedInSameUnit(binding.declaringClass)) {
JavaElement method = getJavaElementOfCompilationUnit(binding);
if (method != null) result[elementCount++] = method;
} else {
JavaElement method = Util.getUnresolvedJavaElement(binding, this.owner, EmptyNodeMap);
if (method != null) result[elementCount++] = method.resolved(binding);
}
} catch (AbortCompilation e) {
// log the exception and proceed
Util.logRepeatedMessage(e.getKey(), e);
}
}
}
if (elementCount != result.length) {
System.arraycopy(result, 0, result = new IJavaElement[elementCount], 0, elementCount);
}
return result;
// {ObjectTeams: cleanup:
}
// SH}
}
