/** {@inheritDoc} */
@Override
public Object invoke(final Object proxy, final Method method, final Object[] args)
throws Throwable {
unwrapArgs(method.getParameterTypes(), args);
if (!mixinHandlers.isEmpty()) {
MethodSignature methodSignature = MethodSignature.forMethod(method);
if (mixinHandlers.containsKey(methodSignature)) {
return mixinHandlers.get(methodSignature).invoke(proxy, method, args);
}
}
final InvocationHandler invocationHandler = handlers.get(MethodSignature.forMethod(method));
if (invocationHandler != null) {
try {
return invocationHandler.invoke(proxy, method, args);
} catch (XPathExpressionException e) {
throw new XBPathException(e, method, "??");
}
}
throw new IllegalArgumentException(
"I don't known how to invoke method "
+ method
+ ". Did you forget to add a XB*-annotation or to register a mixin?");
}
public static boolean isReceiverType(
PsiType functionalInterfaceType,
PsiClass containingClass,
@Nullable PsiMethod referencedMethod) {
final PsiClassType.ClassResolveResult resolveResult =
PsiUtil.resolveGenericsClassInType(functionalInterfaceType);
final MethodSignature function = LambdaUtil.getFunction(resolveResult.getElement());
if (function != null) {
final int interfaceMethodParamsLength = function.getParameterTypes().length;
if (interfaceMethodParamsLength > 0) {
final PsiType firstParamType =
resolveResult.getSubstitutor().substitute(function.getParameterTypes()[0]);
boolean isReceiver =
isReceiverType(
firstParamType,
containingClass,
PsiUtil.resolveGenericsClassInType(firstParamType).getSubstitutor());
if (isReceiver) {
if (referencedMethod == null) {
if (interfaceMethodParamsLength == 1) return true;
return false;
}
if (referencedMethod.getParameterList().getParametersCount()
!= interfaceMethodParamsLength - 1) {
return false;
}
return true;
}
}
}
return false;
}
@NotNull
private static List<PsiMethod> findMethodsBySignature(
@NotNull PsiClass aClass,
@NotNull PsiMethod patternMethod,
boolean checkBases,
boolean stopOnFirst) {
final PsiMethod[] methodsByName = aClass.findMethodsByName(patternMethod.getName(), checkBases);
if (methodsByName.length == 0) return Collections.emptyList();
final List<PsiMethod> methods = new SmartList<PsiMethod>();
final MethodSignature patternSignature = patternMethod.getSignature(PsiSubstitutor.EMPTY);
for (final PsiMethod method : methodsByName) {
final PsiClass superClass = method.getContainingClass();
final PsiSubstitutor substitutor;
if (checkBases && !aClass.equals(superClass)) {
substitutor =
TypeConversionUtil.getSuperClassSubstitutor(superClass, aClass, PsiSubstitutor.EMPTY);
} else {
substitutor = PsiSubstitutor.EMPTY;
}
final MethodSignature signature = method.getSignature(substitutor);
if (signature.equals(patternSignature)) {
methods.add(method);
if (stopOnFirst) {
break;
}
}
}
return methods;
}
@Override
public final boolean permitsStaticMethod(Method method, Object[] args) {
for (MethodSignature s : staticMethodSignatures()) {
if (s.matches(method)) {
return true;
}
}
return false;
}
@Nullable
public static PsiMethod findMethodBySignature(
GrTypeDefinition grType, PsiMethod patternMethod, boolean checkBases) {
final MethodSignature patternSignature = patternMethod.getSignature(PsiSubstitutor.EMPTY);
for (PsiMethod method : findMethodsByName(grType, patternMethod.getName(), checkBases, false)) {
MethodSignature signature = getSignatureForInheritor(method, grType);
if (patternSignature.equals(signature)) return method;
}
return null;
}
private <T> Cursor<T> executeForCursor(SqlSession sqlSession, Object[] args) {
Cursor<T> result;
Object param = method.convertArgsToSqlCommandParam(args);
if (method.hasRowBounds()) {
RowBounds rowBounds = method.extractRowBounds(args);
result = sqlSession.<T>selectCursor(command.getName(), param, rowBounds);
} else {
result = sqlSession.<T>selectCursor(command.getName(), param);
}
return result;
}
private <K, V> Map<K, V> executeForMap(SqlSession sqlSession, Object[] args) {
Map<K, V> result;
Object param = method.convertArgsToSqlCommandParam(args);
if (method.hasRowBounds()) {
RowBounds rowBounds = method.extractRowBounds(args);
result = sqlSession.<K, V>selectMap(command.getName(), param, method.getMapKey(), rowBounds);
} else {
result = sqlSession.<K, V>selectMap(command.getName(), param, method.getMapKey());
}
return result;
}
public static PsiType[] getErasedParameterTypes(MethodSignature signature) {
PsiType[] parameterTypes = signature.getParameterTypes();
if (parameterTypes.length == 0) return PsiType.EMPTY_ARRAY;
PsiSubstitutor substitutor = signature.getSubstitutor();
PsiType[] erasedTypes = new PsiType[parameterTypes.length];
for (int i = 0; i < parameterTypes.length; i++) {
erasedTypes[i] =
TypeConversionUtil.erasure(substitutor.substitute(parameterTypes[i]), substitutor);
}
return erasedTypes;
}
@Nullable
public static PsiMethod findMethodBySignature(
@NotNull PsiClass aClass, @NotNull MethodSignature methodSignature, boolean checkBases) {
String name = methodSignature.isConstructor() ? aClass.getName() : methodSignature.getName();
List<Pair<PsiMethod, PsiSubstitutor>> pairs =
aClass.findMethodsAndTheirSubstitutorsByName(name, checkBases);
for (Pair<PsiMethod, PsiSubstitutor> pair : pairs) {
PsiMethod method = pair.first;
PsiSubstitutor substitutor = pair.second;
MethodSignature foundMethodSignature = method.getSignature(substitutor);
if (methodSignature.equals(foundMethodSignature)) return method;
}
return null;
}
@Override
public int computeHashCode(final MethodSignature signature) {
int result = signature.isConstructor() ? 0 : signature.getName().hashCode();
PsiType[] parameterTypes = signature.getParameterTypes();
result += 37 * parameterTypes.length;
PsiType firstParamType = parameterTypes.length == 0 ? null : parameterTypes[0];
if (firstParamType != null) {
firstParamType = TypeConversionUtil.erasure(firstParamType, signature.getSubstitutor());
assert firstParamType != null : parameterTypes[0];
result = 31 * result + firstParamType.hashCode();
}
return result;
}
private Map<MethodSignature, InvocationHandler> getDefaultInvokers(
final Object defaultInvokerObject) {
final ReflectionInvoker reflectionInvoker = new ReflectionInvoker(defaultInvokerObject);
final Map<MethodSignature, InvocationHandler> invokers =
new HashMap<MethodSignature, InvocationHandler>();
for (Method m : DOMAccess.class.getMethods()) {
if (m.getAnnotation(XBWrite.class) == null) {
invokers.put(MethodSignature.forMethod(m), reflectionInvoker);
}
}
invokers.put(MethodSignature.forVoidMethod("toString"), reflectionInvoker);
invokers.put(MethodSignature.forSingleParam("equals", Object.class), reflectionInvoker);
invokers.put(MethodSignature.forVoidMethod("hashCode"), reflectionInvoker);
return invokers; // Collections.unmodifiableMap(invokers);
}
@Nullable
private static List<MethodSignature> hasSubsignature(List<MethodSignature> signatures) {
for (MethodSignature signature : signatures) {
boolean subsignature = true;
for (MethodSignature methodSignature : signatures) {
if (!signature.equals(methodSignature)) {
if (!MethodSignatureUtil.isSubsignature(signature, methodSignature)) {
subsignature = false;
break;
}
}
}
if (subsignature) return Collections.singletonList(signature);
}
return signatures;
}
@Nullable
private static PsiMethod doFindMethodInSuperClassBySignatureInDerived(
@NotNull PsiClass superClass,
@NotNull PsiSubstitutor superSubstitutor,
@NotNull MethodSignature signature,
final boolean checkDeep) {
final String name = signature.getName();
final PsiMethod[] methods = superClass.findMethodsByName(name, false);
for (final PsiMethod method : methods) {
if (isSubsignature(method.getSignature(superSubstitutor), signature)) {
return method;
}
}
if (checkDeep) {
final PsiClass clazz = superClass.getSuperClass();
if (clazz != null && clazz != superClass) {
PsiSubstitutor substitutor1 =
TypeConversionUtil.getSuperClassSubstitutor(clazz, superClass, superSubstitutor);
return doFindMethodInSuperClassBySignatureInDerived(clazz, substitutor1, signature, true);
}
}
return null;
}
private static PsiMethod[] findMethodsBySignature(
GrTypeDefinition grType,
PsiMethod patternMethod,
boolean checkBases,
boolean includeSynthetic) {
ArrayList<PsiMethod> result = new ArrayList<PsiMethod>();
final MethodSignature patternSignature = patternMethod.getSignature(PsiSubstitutor.EMPTY);
for (PsiMethod method :
findMethodsByName(grType, patternMethod.getName(), checkBases, includeSynthetic)) {
MethodSignature signature = getSignatureForInheritor(method, grType);
if (patternSignature.equals(signature)) {
result.add(method);
}
}
return result.toArray(new PsiMethod[result.size()]);
}
private void executeWithResultHandler(SqlSession sqlSession, Object[] args) {
MappedStatement ms = sqlSession.getConfiguration().getMappedStatement(command.getName());
if (void.class.equals(ms.getResultMaps().get(0).getType())) {
throw new BindingException(
"method "
+ command.getName()
+ " needs either a @ResultMap annotation, a @ResultType annotation,"
+ " or a resultType attribute in XML so a ResultHandler can be used as a parameter.");
}
Object param = method.convertArgsToSqlCommandParam(args);
if (method.hasRowBounds()) {
RowBounds rowBounds = method.extractRowBounds(args);
sqlSession.select(command.getName(), param, rowBounds, method.extractResultHandler(args));
} else {
sqlSession.select(command.getName(), param, method.extractResultHandler(args));
}
}
@Test
public void getInterceptionHandler_whenCallIsNotRecognized_shouldReturnDoNothingHandler()
throws Exception {
MethodSignature methodSignature = MethodSignature.parse("java/lang/Object/unknownMethod()V");
Function<Object, Object> handler = shadowWrangler.getInterceptionHandler(methodSignature);
assertThat(handler).isNotNull().isSameAs(ShadowWrangler.DO_NOTHING_HANDLER);
assertThat(handler.call(null)).isNull();
}
public static boolean isSubsignature(
MethodSignature superSignature, MethodSignature subSignature) {
if (subSignature == superSignature) return true;
if (!areSignaturesEqualLightweight(superSignature, subSignature)) return false;
PsiSubstitutor unifyingSubstitutor =
getSuperMethodSignatureSubstitutor(subSignature, superSignature);
if (checkSignaturesEqualInner(superSignature, subSignature, unifyingSubstitutor)) return true;
if (subSignature.getTypeParameters().length > 0) return false;
final PsiType[] subParameterTypes = subSignature.getParameterTypes();
final PsiType[] superParameterTypes = superSignature.getParameterTypes();
for (int i = 0; i < subParameterTypes.length; i++) {
PsiType type1 = subParameterTypes[i];
PsiType type2 = TypeConversionUtil.erasure(superParameterTypes[i]);
if (!Comparing.equal(type1, type2)) return false;
}
return true;
}
private <E> Object executeForMany(SqlSession sqlSession, Object[] args) {
List<E> result;
Object param = method.convertArgsToSqlCommandParam(args);
if (method.hasRowBounds()) {
RowBounds rowBounds = method.extractRowBounds(args);
result = sqlSession.<E>selectList(command.getName(), param, rowBounds);
} else {
result = sqlSession.<E>selectList(command.getName(), param);
}
// issue #510 Collections & arrays support
if (!method.getReturnType().isAssignableFrom(result.getClass())) {
if (method.getReturnType().isArray()) {
return convertToArray(result);
} else {
return convertToDeclaredCollection(sqlSession.getConfiguration(), result);
}
}
return result;
}
/**
* Adds a method to the class which bridges from the service method to the corresponding method in
* the filter interface. The next service (either another Bridge, or the terminator at the end of
* the pipeline) is passed to the filter).
*/
private void addBridgeMethod(int position, MethodSignature ms, MethodSignature fms) {
StringBuffer buffer = new StringBuffer(100);
if (ms.getReturnType() != void.class) buffer.append("return ");
buffer.append("_filter.");
buffer.append(ms.getName());
buffer.append("(");
boolean comma = false;
int filterParameterCount = fms.getParameterTypes().length;
for (int i = 0; i < position; i++) {
if (comma) buffer.append(", ");
buffer.append("$");
// Add one to the index to get the parameter symbol ($0 is the implicit
// this parameter).
buffer.append(i + 1);
comma = true;
}
if (comma) buffer.append(", ");
// _next is the variable in -this- Bridge that points to the -next- Bridge
// or the terminator for the pipeline. The filter is expected to reinvoke the
// method on the _next that's passed to it.
buffer.append("_next");
for (int i = position + 1; i < filterParameterCount; i++) {
buffer.append(", $");
buffer.append(i);
}
buffer.append(");");
// This should work, unless the exception types turn out to not be compatble. We still
// don't do a check on that, and not sure that Javassist does either!
_classFab.addMethod(Modifier.PUBLIC, ms, buffer.toString());
}
private static boolean checkSignaturesEqualInner(
@NotNull MethodSignature subSignature,
@NotNull MethodSignature superSignature,
final PsiSubstitutor unifyingSubstitutor) {
if (unifyingSubstitutor == null) return false;
if (!areErasedParametersEqual(subSignature, superSignature)) return false;
final PsiType[] subParameterTypes = subSignature.getParameterTypes();
final PsiType[] superParameterTypes = superSignature.getParameterTypes();
for (int i = 0; i < subParameterTypes.length; i++) {
final PsiType type1 = unifyingSubstitutor.substitute(subParameterTypes[i]);
final PsiType type2 = unifyingSubstitutor.substitute(superParameterTypes[i]);
if (!Comparing.equal(type1, type2)) {
return false;
}
}
return true;
}
@Test
public void
getInterceptionHandler_whenInterceptingElderOnLinkedHashMap_shouldReturnNonDoNothingHandler()
throws Exception {
MethodSignature methodSignature =
MethodSignature.parse("java/util/LinkedHashMap/eldest()Ljava/lang/Object");
Function<Object, Object> handler = shadowWrangler.getInterceptionHandler(methodSignature);
assertThat(handler).isNotSameAs(ShadowWrangler.DO_NOTHING_HANDLER);
}
@Override
public void genCyan(
PWInterface pw, boolean printInMoreThanOneLine, CyanEnv cyanEnv, boolean genFunctions) {
if (cyanEnv.getCreatingInstanceGenericPrototype()) {
pw.print(cyanEnv.formalGenericParamToRealParam(methodName.getSymbolString()));
} else {
pw.print(methodName.getSymbolString());
}
super.genCyan(pw, printInMoreThanOneLine, cyanEnv, genFunctions);
}
@Nullable
private static PsiSubstitutor getSuperMethodSignatureSubstitutorImpl(
@NotNull MethodSignature methodSignature, @NotNull MethodSignature superSignature) {
// normalize generic method declarations: correlate type parameters
// todo: correlate type params by name?
PsiTypeParameter[] methodTypeParameters = methodSignature.getTypeParameters();
PsiTypeParameter[] superTypeParameters = superSignature.getTypeParameters();
// both methods are parameterized and number of parameters mismatch
if (methodTypeParameters.length != superTypeParameters.length) return null;
PsiSubstitutor result = superSignature.getSubstitutor();
for (int i = 0; i < methodTypeParameters.length; i++) {
PsiTypeParameter methodTypeParameter = methodTypeParameters[i];
PsiElementFactory factory =
JavaPsiFacade.getInstance(methodTypeParameter.getProject()).getElementFactory();
result = result.put(superTypeParameters[i], factory.createType(methodTypeParameter));
}
return result;
}
@Nullable
private static PsiMethod getMethod(PsiClass psiClass, MethodSignature methodSignature) {
final PsiMethod[] methodsByName = psiClass.findMethodsByName(methodSignature.getName(), true);
for (PsiMethod psiMethod : methodsByName) {
if (MethodSignatureUtil.areSignaturesEqual(
getMethodSignature(psiMethod, psiClass, psiMethod.getContainingClass()),
methodSignature)) {
return psiMethod;
}
}
return null;
}
public static boolean areSignaturesEqualLightweight(
@NotNull MethodSignature sig1, @NotNull MethodSignature sig2) {
final boolean isConstructor1 = sig1.isConstructor();
final boolean isConstructor2 = sig2.isConstructor();
if (isConstructor1 != isConstructor2) return false;
if (!isConstructor1
|| !(sig1 instanceof HierarchicalMethodSignature
|| sig2 instanceof HierarchicalMethodSignature)) {
final String name1 = sig1.getName();
final String name2 = sig2.getName();
if (!name1.equals(name2)) return false;
}
final PsiType[] parameterTypes1 = sig1.getParameterTypes();
final PsiType[] parameterTypes2 = sig2.getParameterTypes();
if (parameterTypes1.length != parameterTypes2.length) return false;
// optimization: check for really different types in method parameters
for (int i = 0; i < parameterTypes1.length; i++) {
final PsiType type1 = parameterTypes1[i];
final PsiType type2 = parameterTypes2[i];
if (type1 instanceof PsiPrimitiveType != type2 instanceof PsiPrimitiveType) return false;
if (type1 instanceof PsiPrimitiveType && !type1.equals(type2)) return false;
}
return true;
}
/**
* @param methodSignature method signature
* @param superMethodSignature super method signature
* @return null if signatures do not match
*/
@Nullable
public static PsiSubstitutor getSuperMethodSignatureSubstitutor(
@NotNull MethodSignature methodSignature, @NotNull MethodSignature superMethodSignature) {
PsiSubstitutor result =
getSuperMethodSignatureSubstitutorImpl(methodSignature, superMethodSignature);
if (result == null) return null;
PsiTypeParameter[] methodTypeParameters = methodSignature.getTypeParameters();
PsiTypeParameter[] superTypeParameters = superMethodSignature.getTypeParameters();
PsiSubstitutor methodSubstitutor = methodSignature.getSubstitutor();
// check bounds
for (int i = 0; i < methodTypeParameters.length; i++) {
PsiTypeParameter methodTypeParameter = methodTypeParameters[i];
PsiTypeParameter superTypeParameter = superTypeParameters[i];
final Set<PsiType> methodSupers = new HashSet<PsiType>();
for (PsiClassType methodSuper : methodTypeParameter.getSuperTypes()) {
methodSupers.add(methodSubstitutor.substitute(methodSuper));
}
final Set<PsiType> superSupers = new HashSet<PsiType>();
for (PsiClassType superSuper : superTypeParameter.getSuperTypes()) {
superSupers.add(
methodSubstitutor.substitute(
PsiUtil.captureToplevelWildcards(
result.substitute(superSuper), methodTypeParameter)));
}
methodSupers.remove(
PsiType.getJavaLangObject(
methodTypeParameter.getManager(), methodTypeParameter.getResolveScope()));
superSupers.remove(
PsiType.getJavaLangObject(
superTypeParameter.getManager(), superTypeParameter.getResolveScope()));
if (!methodSupers.equals(superSupers)) return null;
}
return result;
}
private static boolean hasReceiver(
@NotNull PsiMethodReferenceExpression methodRef,
@NotNull PsiMethod method,
PsiType functionalInterfaceType) {
final PsiClassType.ClassResolveResult resolveResult =
PsiUtil.resolveGenericsClassInType(functionalInterfaceType);
final PsiMethod interfaceMethod = LambdaUtil.getFunctionalInterfaceMethod(resolveResult);
final MethodSignature signature =
interfaceMethod != null
? interfaceMethod.getSignature(
LambdaUtil.getSubstitutor(interfaceMethod, resolveResult))
: null;
if (signature == null) {
return false;
}
final PsiType[] parameterTypes = signature.getParameterTypes();
final QualifierResolveResult qualifierResolveResult = getQualifierResolveResult(methodRef);
return (method.getParameterList().getParametersCount() + 1 == parameterTypes.length
|| method.isVarArgs()
&& parameterTypes.length > 0
&& !method.hasModifierProperty(PsiModifier.STATIC))
&& hasReceiver(parameterTypes, qualifierResolveResult, methodRef);
}
private void fixupSignature(MethodSignature signature) throws IOException {
int classNameIndex = signature.getClassNameIndex();
String dottedName = constantPool.getUtf8(classNameIndex).getString().replace("/", ".");
signature.setClassNameIndex(getOrInsertUtf8(dottedName));
signature.setMethodNameIndex(
getOrInsertString(signature.getMethodNameIndex())); // will be a String resource now
signature.setClassNameIndex(
getOrInsertString(signature.getClassNameIndex())); // will be a String resource now
}
private Map<String, Integer> getOrInsertPrimitiveWrapperMethods(MethodSignature signature)
throws IOException {
Map<String, Integer> methodRefs = new HashMap<String, Integer>();
int valueOfString = getOrInsertUtf8("valueOf");
for (String paramType : signature.getParamTypes()) {
char baseType = paramType.charAt(0);
Class wrapperClass = getWrapperClass(baseType);
if (wrapperClass != null) {
int wrapperMethod = getOrInsertPrimitiveWrappeMethod(wrapperClass, baseType, valueOfString);
methodRefs.put(paramType, wrapperMethod);
}
}
return methodRefs;
}
private Object rowCountResult(int rowCount) {
final Object result;
if (method.returnsVoid()) {
result = null;
} else if (Integer.class.equals(method.getReturnType())
|| Integer.TYPE.equals(method.getReturnType())) {
result = Integer.valueOf(rowCount);
} else if (Long.class.equals(method.getReturnType())
|| Long.TYPE.equals(method.getReturnType())) {
result = Long.valueOf(rowCount);
} else if (Boolean.class.equals(method.getReturnType())
|| Boolean.TYPE.equals(method.getReturnType())) {
result = Boolean.valueOf(rowCount > 0);
} else {
throw new BindingException(
"Mapper method '"
+ command.getName()
+ "' has an unsupported return type: "
+ method.getReturnType());
}
return result;
}
