/*
* Copyright 2002-2011 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
*
* 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.
*/
package org.springframework.core.convert;
import java.lang.annotation.Annotation;
import org.springframework.core.GenericCollectionTypeResolver;
import org.springframework.core.MethodParameter;
/**
* @author Keith Donald
* @since 3.1
*/
class ParameterDescriptor extends AbstractDescriptor {
private final MethodParameter methodParameter;
public ParameterDescriptor(MethodParameter methodParameter) {
super(methodParameter.getParameterType());
if (methodParameter.getNestingLevel() != 1) {
throw new IllegalArgumentException("MethodParameter argument must have its nestingLevel set to 1");
}
this.methodParameter = methodParameter;
}
private ParameterDescriptor(Class<?> type, MethodParameter methodParameter) {
super(type);
this.methodParameter = methodParameter;
}
@Override
public Annotation[] getAnnotations() {
if (this.methodParameter.getParameterIndex() == -1) {
return TypeDescriptor.nullSafeAnnotations(this.methodParameter.getMethodAnnotations());
}
else {
return TypeDescriptor.nullSafeAnnotations(this.methodParameter.getParameterAnnotations());
}
}
@Override
protected Class<?> resolveCollectionElementType() {
return GenericCollectionTypeResolver.getCollectionParameterType(this.methodParameter);
}
@Override
protected Class<?> resolveMapKeyType() {
return GenericCollectionTypeResolver.getMapKeyParameterType(this.methodParameter);
}
@Override
protected Class<?> resolveMapValueType() {
return GenericCollectionTypeResolver.getMapValueParameterType(this.methodParameter);
}
@Override
protected AbstractDescriptor nested(Class<?> type, int typeIndex) {
MethodParameter methodParameter = new MethodParameter(this.methodParameter);
methodParameter.increaseNestingLevel();
methodParameter.setTypeIndexForCurrentLevel(typeIndex);
return new ParameterDescriptor(type, methodParameter);
}
}