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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
/** Class with helper methods for field and method lookups using java.lang.invoke. */
public class JLI {
public static boolean canDiscoverWithLookupFindGetter(
MethodHandles.Lookup lookup, Class<?> klass, String fieldName, Class<?> fieldType) {
try {
return lookup.findGetter(klass, fieldName, fieldType) != null;
} catch (NoSuchFieldException e) {
return false;
} catch (IllegalAccessException e) {
return true;
}
}
public static boolean canDiscoverWithLookupFindSetter(
MethodHandles.Lookup lookup, Class<?> klass, String fieldName, Class<?> fieldType) {
try {
return lookup.findSetter(klass, fieldName, fieldType) != null;
} catch (NoSuchFieldException e) {
return false;
} catch (IllegalAccessException e) {
return true;
}
}
public static boolean canDiscoverWithLookupFindStaticGetter(
MethodHandles.Lookup lookup, Class<?> klass, String fieldName, Class<?> fieldType) {
try {
return lookup.findStaticGetter(klass, fieldName, fieldType) != null;
} catch (NoSuchFieldException e) {
return false;
} catch (IllegalAccessException e) {
return true;
}
}
public static boolean canDiscoverWithLookupFindStaticSetter(
MethodHandles.Lookup lookup, Class<?> klass, String fieldName, Class<?> fieldType) {
try {
return lookup.findStaticSetter(klass, fieldName, fieldType) != null;
} catch (NoSuchFieldException e) {
return false;
} catch (IllegalAccessException e) {
return true;
}
}
public static boolean canDiscoverWithLookupFindConstructor(
MethodHandles.Lookup lookup, Class<?> klass, MethodType methodType) {
try {
return lookup.findConstructor(klass, methodType) != null;
} catch (NoSuchMethodException e) {
return false;
} catch (IllegalAccessException e) {
return true;
}
}
public static boolean canDiscoverWithLookupFindVirtual(
MethodHandles.Lookup lookup, Class<?> klass, String methodName, MethodType methodType) {
try {
return lookup.findVirtual(klass, methodName, methodType) != null;
} catch (NoSuchMethodException e) {
return false;
} catch (IllegalAccessException e) {
return true;
}
}
public static boolean canDiscoverWithLookupFindStatic(
MethodHandles.Lookup lookup, Class<?> klass, String methodName, MethodType methodType) {
try {
return lookup.findStatic(klass, methodName, methodType) != null;
} catch (NoSuchMethodException e) {
return false;
} catch (IllegalAccessException e) {
return true;
}
}
}
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