@Override
public void endVisit(JMethodCall x, Context ctx) {
JMethod target = x.getTarget();
JDeclaredType type = target.getEnclosingType();
if (type instanceof JClassType) {
JClassType cType = (JClassType) type;
if (target == enumNameMethod
|| target == enumToStringMethod
|| target == enumValueOfMethod) {
warn(x);
} else if (cType.isEnumOrSubclass() != null) {
if ("valueOf".equals(target.getName())) {
/*
* Check for calls to the auto-generated
* EnumSubType.valueOf(String). Note, the check of the signature for
* the single String arg version is to avoid flagging user-defined
* overloaded versions of the method, which are presumably ok.
*/
List<JParameter> jParameters = target.getParams();
if (jParameters.size() == 1 && jParameters.get(0).getType() == stringType) {
warn(x);
}
}
}
}
}
private static JMethod createEmptyMethodFromExample(
JDeclaredType inType, JMethod exampleMethod, boolean isAbstract) {
JMethod emptyMethod =
new JMethod(
exampleMethod.getSourceInfo(),
exampleMethod.getName(),
inType,
exampleMethod.getType(),
isAbstract,
false,
false,
exampleMethod.getAccess());
emptyMethod.addThrownExceptions(exampleMethod.getThrownExceptions());
emptyMethod.setSynthetic();
// Copy parameters.
for (JParameter param : exampleMethod.getParams()) {
emptyMethod.addParam(
new JParameter(
param.getSourceInfo(),
param.getName(),
param.getType(),
param.isFinal(),
param.isThis(),
emptyMethod));
}
JMethodBody body = new JMethodBody(exampleMethod.getSourceInfo());
emptyMethod.setBody(body);
emptyMethod.freezeParamTypes();
inType.addMethod(emptyMethod);
return emptyMethod;
}
public EnumNameCallChecker(JProgram jprogram, TreeLogger logger) {
this.logger = logger;
this.enumNameMethod = jprogram.getIndexedMethod("Enum.name");
this.enumToStringMethod = jprogram.getIndexedMethod("Enum.toString");
this.classType = jprogram.getIndexedType("Class");
this.enumType = jprogram.getIndexedType("Enum");
this.stringType = jprogram.getIndexedType("String");
/*
* Find the correct version of enumValueOfMethod.
*
* Note: it doesn't work to check against a ref returned by
* jprogram.getIndexedMethod("Enum.valueOf"), since there are 2 different
* versions of Enum.valueOf in our jre emulation library, and the indexed
* ref won't reliably flag the public instance, which is the one we want
* here (i.e. Enum.valueOf(Class<T>,String)). The other version is
* protected, but is called by the generated constructors for sub-classes
* of Enum, and we don't want to warn for those cases.
*/
JMethod foundMethod = null;
List<JMethod> enumMethods = enumType.getMethods();
for (JMethod enumMethod : enumMethods) {
if ("valueOf".equals(enumMethod.getName())) {
List<JParameter> jParameters = enumMethod.getParams();
if (jParameters.size() == 2
&& jParameters.get(0).getType() == classType
&& jParameters.get(1).getType() == stringType) {
foundMethod = enumMethod;
break;
}
}
}
this.enumValueOfMethod = foundMethod;
}
/** Returns a description for a member suitable for reporting errors to the users. */
public static String getReadableDescription(JMember member) {
if (member instanceof JField) {
return String.format(
"%s %s.%s",
getReadableDescription(member.getType()),
getReadableDescription(member.getEnclosingType()),
member.getName());
}
JMethod method = (JMethod) member;
String printableDescription = "";
if (!method.isConstructor()) {
printableDescription += getReadableDescription(method.getType()) + " ";
}
printableDescription +=
String.format(
"%s.%s(%s)",
getReadableDescription(method.getEnclosingType()),
method.getName(),
Joiner.on(", ")
.join(
Iterables.transform(
method.getOriginalParamTypes(),
new Function<JType, String>() {
@Override
public String apply(JType type) {
return getReadableDescription(type);
}
})));
return printableDescription;
}
public JExpression doRebind(String clsName, ReflectionGeneratorContext params)
throws UnableToCompleteException {
// generate
params.getLogger().log(Type.INFO, "Binding magic class for " + clsName);
// JType type = params.getClazz().getRefType();
JDeclaredType type =
params.getAst().searchForTypeBySource(params.getClazz().getRefType().getName());
StandardGeneratorContext ctx = params.getGeneratorContext();
Class<? extends Generator> generator = MagicClassGenerator.class;
String result =
ctx.runGenerator(params.getLogger(), generator, SourceUtil.toSourceName(type.getName()));
ctx.finish(params.getLogger());
params.getLogger().log(Type.INFO, "Generated Class Enhancer: " + result);
JDeclaredType success = params.getAst().searchForTypeBySource(result);
// Okay, we've generated the correct magic class subtype;
// Now pull off its static accessor method to grab our generated class.
for (JMethod method : success.getMethods()) {
if (method.isStatic() && method.getName().equals("enhanceClass")) {
JMethodCall call = new JMethodCall(method.getSourceInfo(), null, method);
call.addArg(params.getClazz().makeStatement().getExpr());
return call;
}
}
params.getLogger().log(Type.ERROR, "Unable to load " + result + ".enhanceClass()");
throw new UnableToCompleteException();
}
private static boolean isNewMethod(HasEnclosingType member) {
if (member instanceof JMethod) {
JMethod method = (JMethod) member;
return method.getName().equals(JsniRef.NEW);
}
assert member instanceof JField;
return false;
}
/**
* Return the JSNI signature for a member. Leave off the return type for a method signature, so as
* to match what a user would type in as a JsniRef.
*/
private static String getJsniSignature(HasEnclosingType member, boolean wildcardParams) {
if (member instanceof JField) {
return ((JField) member).getName();
}
JMethod method = (JMethod) member;
if (wildcardParams) {
return method.getName() + "(" + JsniRef.WILDCARD_PARAM_LIST + ")";
} else {
return JProgram.getJsniSig(method, false);
}
}
private static void setJsPropertyProperties(JMethod method) {
String methodName = method.getName();
if (startsWithCamelCase(methodName, "set")) {
String jsName = Introspector.decapitalize(methodName.substring(3));
method.setJsPropertyInfo(jsName, JsPropertyAccessorType.SETTER);
} else if (startsWithCamelCase(methodName, "get")) {
String jsName = Introspector.decapitalize(methodName.substring(3));
method.setJsPropertyInfo(jsName, JsPropertyAccessorType.GETTER);
} else if (startsWithCamelCase(methodName, "is")) {
String jsName = Introspector.decapitalize(methodName.substring(2));
method.setJsPropertyInfo(jsName, JsPropertyAccessorType.GETTER);
} else {
method.setJsPropertyInfo(INVALID_JSNAME, JsPropertyAccessorType.UNDEFINED);
}
}
private static void setJsPropertyProperties(JMethod method) {
String methodName = method.getName();
if (startsWithCamelCase(methodName, "set")) {
method.setJsPropertyType(JsPropertyType.SET);
method.setJsMemberName(Introspector.decapitalize(methodName.substring(3)));
} else if (startsWithCamelCase(methodName, "get")) {
method.setJsPropertyType(JsPropertyType.GET);
method.setJsMemberName(Introspector.decapitalize(methodName.substring(3)));
} else if (startsWithCamelCase(methodName, "is")) {
method.setJsPropertyType(JsPropertyType.GET);
method.setJsMemberName(Introspector.decapitalize(methodName.substring(2)));
} else {
method.setJsPropertyType(JsPropertyType.UNDEFINED);
}
}
/**
* For each member with the given name, find the most derived members for each JSNI reference that
* match it. For wildcard JSNI references, there will in general be more than one match. This
* method does not ignore synthetic methods.
*/
private static void findMostDerivedMembers(
LinkedHashMap<String, LinkedHashMap<String, HasEnclosingType>> matchesBySig,
JDeclaredType targetType,
String memberName,
boolean addConstructors) {
/*
* Analyze superclasses and interfaces first. More derived members will thus
* be seen later.
*/
if (targetType instanceof JClassType) {
JClassType targetClass = (JClassType) targetType;
if (targetClass.getSuperClass() != null) {
findMostDerivedMembers(matchesBySig, targetClass.getSuperClass(), memberName, false);
}
}
for (JDeclaredType intf : targetType.getImplements()) {
findMostDerivedMembers(matchesBySig, intf, memberName, false);
}
// Get the methods on this class/interface.
for (JMethod method : targetType.getMethods()) {
if (method.getName().equals(memberName)) {
if (addConstructors || !method.getName().equals(JsniRef.NEW)) {
addMember(matchesBySig, method, getJsniSignature(method, false));
addMember(matchesBySig, method, getJsniSignature(method, true));
}
}
}
// Get the fields on this class/interface.
for (JField field : targetType.getFields()) {
if (field.getName().equals(memberName)) {
addMember(matchesBySig, field, field.getName());
}
}
}
/**
* Java8 Method References such as String::equalsIgnoreCase should produce inner class names that
* are a function of the samInterface (e.g. Runnable), the method being referred to, and the
* qualifying disposition (this::foo vs Class::foo if foo is an instance method)
*/
public static String classNameForMethodReference(
JType cuType,
JInterfaceType functionalInterface,
JMethod referredMethod,
boolean hasReceiver) {
String prefix =
classNamePrefixForMethodReference(
cuType.getPackageName(),
cuType.getName(),
functionalInterface.getName(),
referredMethod.getEnclosingType().getName(),
referredMethod.getName(),
hasReceiver);
return StringInterner.get().intern(constructManglingSignature(referredMethod, prefix));
}