org.openrewrite.java.tree.TypeUtils Maven / Gradle / Ivy
/*
* Copyright 2020 the original author or authors.
*
* 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
*
* https://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.
*/
package org.openrewrite.java.tree;
import org.openrewrite.internal.lang.Nullable;
import java.util.Arrays;
import java.util.List;
import static java.util.Collections.emptyList;
public class TypeUtils {
private TypeUtils() {
}
public static List getVisibleSupertypeMembers(@Nullable JavaType type) {
JavaType.Class classType = TypeUtils.asClass(type);
return classType == null ? emptyList() : classType.getVisibleSupertypeMembers();
}
public static boolean isString(@Nullable JavaType type) {
return type instanceof JavaType.Class && "java.lang.String".equals(((JavaType.Class) type).getFullyQualifiedName());
}
public static boolean isOfClassType(@Nullable JavaType type, String fqn) {
JavaType.Class classType = asClass(type);
return classType != null && classType.getFullyQualifiedName().equals(fqn);
}
public static boolean isAssignableTo(@Nullable JavaType to, @Nullable JavaType from) {
if(from == JavaType.Class.OBJECT) {
return to == JavaType.Class.OBJECT;
}
JavaType.Class classTo = asClass(to);
JavaType.Class classFrom = asClass(from);
if (classTo == null || classFrom == null) {
return false;
}
if (classTo.getFullyQualifiedName().equals(classFrom.getFullyQualifiedName()) ||
isAssignableTo(to, classFrom.getSupertype()) ||
classFrom.getInterfaces().stream().anyMatch(i -> isAssignableTo(to, i))) {
return true;
}
try {
Class classFromReflect = Class.forName(classFrom.getFullyQualifiedName(), false, TypeUtils.class.getClassLoader());
if(classFromReflect.getSuperclass() != null && isAssignableTo(to, JavaType.Class.build(classFromReflect.getSuperclass().getName()))) {
return true;
}
return Arrays.stream(classFromReflect.getInterfaces()).anyMatch(i -> isAssignableTo(to, JavaType.Class.build(i.getName())));
} catch (ClassNotFoundException ignored) {
return false;
}
}
@Nullable
public static JavaType.Class asClass(@Nullable JavaType type) {
return type instanceof JavaType.Class ? (JavaType.Class) type : null;
}
@Nullable
public static JavaType.Array asArray(@Nullable JavaType type) {
return type instanceof JavaType.Array ? (JavaType.Array) type : null;
}
@Nullable
public static JavaType.GenericTypeVariable asGeneric(@Nullable JavaType type) {
return type instanceof JavaType.GenericTypeVariable ? (JavaType.GenericTypeVariable) type : null;
}
@Nullable
public static JavaType.Method asMethod(@Nullable JavaType type) {
return type instanceof JavaType.Method ? (JavaType.Method) type : null;
}
@Nullable
public static JavaType.Primitive asPrimitive(@Nullable JavaType type) {
return type instanceof JavaType.Primitive ? (JavaType.Primitive) type : null;
}
@Nullable
public static JavaType.FullyQualified asFullyQualified(@Nullable JavaType type) {
return type instanceof JavaType.FullyQualified ? (JavaType.FullyQualified) type : null;
}
public static boolean hasElementType(@Nullable JavaType type, String fullyQualifiedName) {
if (type instanceof JavaType.Array) {
return hasElementType(((JavaType.Array) type).getElemType(), fullyQualifiedName);
}
if (type instanceof JavaType.Class) {
return ((JavaType.Class) type).getFullyQualifiedName().equals(fullyQualifiedName);
}
if (type instanceof JavaType.GenericTypeVariable) {
return ((JavaType.GenericTypeVariable) type).getFullyQualifiedName().equals(fullyQualifiedName);
}
return false;
}
static boolean deepEquals(List ts1, List ts2) {
if (ts1.size() != ts2.size()) {
return false;
}
for (int i = 0; i < ts1.size(); i++) {
JavaType t1 = ts1.get(i);
JavaType t2 = ts2.get(i);
if (t1 == null) {
if (t2 != null) {
return false;
}
} else if (!deepEquals(t1, t2)) {
return false;
}
}
return true;
}
static boolean deepEquals(@Nullable JavaType t, @Nullable JavaType t2) {
return t == null ? t2 == null : t.deepEquals(t2);
}
}