/*
* 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 java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
import org.springframework.core.GenericCollectionTypeResolver;
/**
* @author Keith Donald
* @since 2.0
*/
class FieldDescriptor extends AbstractDescriptor {
private final Field field;
private final int nestingLevel;
private Map<Integer, Integer> typeIndexesPerLevel;
public FieldDescriptor(Field field) {
super(field.getType());
this.field = field;
this.nestingLevel = 1;
}
private FieldDescriptor(Class<?> type, Field field, int nestingLevel, int typeIndex, Map<Integer, Integer> typeIndexesPerLevel) {
super(type);
this.field = field;
this.nestingLevel = nestingLevel;
this.typeIndexesPerLevel = typeIndexesPerLevel;
this.typeIndexesPerLevel.put(nestingLevel, typeIndex);
}
@Override
public Annotation[] getAnnotations() {
return TypeDescriptor.nullSafeAnnotations(this.field.getAnnotations());
}
@Override
protected Class<?> resolveCollectionElementType() {
return GenericCollectionTypeResolver.getCollectionFieldType(this.field, this.nestingLevel, this.typeIndexesPerLevel);
}
@Override
protected Class<?> resolveMapKeyType() {
return GenericCollectionTypeResolver.getMapKeyFieldType(this.field, this.nestingLevel, this.typeIndexesPerLevel);
}
@Override
protected Class<?> resolveMapValueType() {
return GenericCollectionTypeResolver.getMapValueFieldType(this.field, this.nestingLevel, this.typeIndexesPerLevel);
}
@Override
protected AbstractDescriptor nested(Class<?> type, int typeIndex) {
if (this.typeIndexesPerLevel == null) {
this.typeIndexesPerLevel = new HashMap<Integer, Integer>(4);
}
return new FieldDescriptor(type, this.field, this.nestingLevel + 1, typeIndex, this.typeIndexesPerLevel);
}
}