keycloakjar.org.springframework.beans.factory.aot.AutowiredArgumentsCodeGenerator Maven / Gradle / Ivy
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/*
* Copyright 2002-2022 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.springframework.beans.factory.aot;
import java.lang.reflect.Constructor;
import java.lang.reflect.Executable;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.function.Predicate;
import org.springframework.javapoet.CodeBlock;
import org.springframework.util.Assert;
import org.springframework.util.ReflectionUtils;
/**
* Code generator to apply {@link AutowiredArguments}.
*
* Generates code in the form: {@code args.get(0), args.get(1)} or
* {@code args.get(0, String.class), args.get(1, Integer.class)}
*
*
The simpler form is only used if the target method or constructor is
* unambiguous.
*
* @author Phillip Webb
* @author Stephane Nicoll
* @since 6.0
*/
public class AutowiredArgumentsCodeGenerator {
private final Class target;
private final Executable executable;
public AutowiredArgumentsCodeGenerator(Class target, Executable executable) {
this.target = target;
this.executable = executable;
}
public CodeBlock generateCode(Class[] parameterTypes) {
return generateCode(parameterTypes, 0, "args");
}
public CodeBlock generateCode(Class[] parameterTypes, int startIndex) {
return generateCode(parameterTypes, startIndex, "args");
}
public CodeBlock generateCode(Class[] parameterTypes, int startIndex,
String variableName) {
Assert.notNull(parameterTypes, "'parameterTypes' must not be null");
Assert.notNull(variableName, "'variableName' must not be null");
boolean ambiguous = isAmbiguous();
CodeBlock.Builder code = CodeBlock.builder();
for (int i = startIndex; i < parameterTypes.length; i++) {
code.add((i != startIndex) ? ", " : "");
if (!ambiguous) {
code.add("$L.get($L)", variableName, i - startIndex);
}
else {
code.add("$L.get($L, $T.class)", variableName, i - startIndex,
parameterTypes[i]);
}
}
return code.build();
}
private boolean isAmbiguous() {
if (this.executable instanceof Constructor constructor) {
return Arrays.stream(this.target.getDeclaredConstructors())
.filter(Predicate.not(constructor::equals))
.anyMatch(this::hasSameParameterCount);
}
if (this.executable instanceof Method method) {
return Arrays.stream(ReflectionUtils.getAllDeclaredMethods(this.target))
.filter(Predicate.not(method::equals))
.filter(candidate -> candidate.getName().equals(method.getName()))
.anyMatch(this::hasSameParameterCount);
}
return true;
}
private boolean hasSameParameterCount(Executable executable) {
return this.executable.getParameterCount() == executable.getParameterCount();
}
}