/*
* 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 com.addthis.codec.jackson;
import java.util.Iterator;
import com.fasterxml.jackson.databind.BeanDescription;
import com.fasterxml.jackson.databind.DeserializationConfig;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.deser.BeanDeserializerBase;
import com.fasterxml.jackson.databind.deser.BeanDeserializerModifier;
import com.fasterxml.jackson.databind.deser.SettableBeanProperty;
import com.fasterxml.jackson.databind.deser.std.DelegatingDeserializer;
import com.fasterxml.jackson.databind.deser.std.EnumDeserializer;
import com.fasterxml.jackson.databind.deser.std.MapDeserializer;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.fasterxml.jackson.databind.type.MapType;
import com.typesafe.config.Config;
import com.typesafe.config.ConfigValue;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class CodecBeanDeserializerModifier extends BeanDeserializerModifier {
private static final Logger log = LoggerFactory.getLogger(CodecBeanDeserializerModifier.class);
private final Config globalDefaults;
private final boolean modifyEnum;
public CodecBeanDeserializerModifier(Config globalDefaults) {
this.globalDefaults = globalDefaults;
this.modifyEnum = globalDefaults.getBoolean("addthis.codec.jackson.ignore.enum-case");
}
@Override public JsonDeserializer<?> modifyDeserializer(DeserializationConfig config,
BeanDescription beanDesc,
JsonDeserializer<?> deserializer) {
if (deserializer instanceof DelegatingDeserializer) {
JsonDeserializer<?> delegatee = ((DelegatingDeserializer) deserializer).getDelegatee();
JsonDeserializer<?> replacementDelegatee = modifyDeserializer(config, beanDesc, delegatee);
return deserializer.replaceDelegatee(replacementDelegatee);
} else if (deserializer instanceof BeanDeserializerBase) {
BeanDeserializerBase beanDeserializer = (BeanDeserializerBase) deserializer;
ObjectNode fieldDefaults = config.getNodeFactory().objectNode();
Iterator<SettableBeanProperty> propertyIterator = beanDeserializer.properties();
while (propertyIterator.hasNext()) {
SettableBeanProperty prop = propertyIterator.next();
Class<?> declaringClass = prop.getMember().getDeclaringClass();
String canonicalClassName = declaringClass.getCanonicalName();
if ((canonicalClassName != null) && globalDefaults.hasPath(canonicalClassName)) {
Config declarerDefaults = globalDefaults.getConfig(canonicalClassName);
String propertyName = prop.getName();
if (declarerDefaults.hasPath(propertyName)) {
ConfigValue defaultValue = declarerDefaults.getValue(propertyName);
JsonNode fieldDefault = Jackson.configConverter(defaultValue);
fieldDefaults.set(propertyName, fieldDefault);
}
}
}
return new CodecBeanDeserializer(beanDeserializer, fieldDefaults);
} else {
return deserializer;
}
}
@Override public JsonDeserializer<?> modifyMapDeserializer(DeserializationConfig config,
MapType type,
BeanDescription beanDesc,
JsonDeserializer<?> deserializer) {
if (deserializer instanceof DelegatingDeserializer) {
JsonDeserializer<?> delegatee = ((DelegatingDeserializer) deserializer).getDelegatee();
JsonDeserializer<?> replacementDelegatee = modifyMapDeserializer(config, type, beanDesc, delegatee);
return deserializer.replaceDelegatee(replacementDelegatee);
} else if (deserializer.getClass() == MapDeserializer.class) {
return new KeyReportingMapDeserializer((MapDeserializer) deserializer);
} else {
return deserializer;
}
}
@Override public JsonDeserializer<?> modifyEnumDeserializer(DeserializationConfig config,
JavaType type,
BeanDescription beanDesc,
JsonDeserializer<?> deserializer) {
if (deserializer instanceof DelegatingDeserializer) {
JsonDeserializer<?> delegatee = ((DelegatingDeserializer) deserializer).getDelegatee();
JsonDeserializer<?> replacementDelegatee = modifyEnumDeserializer(config, type, beanDesc, delegatee);
return deserializer.replaceDelegatee(replacementDelegatee);
} else if (modifyEnum && (deserializer instanceof EnumDeserializer)) {
return new CaseIgnoringEnumDeserializer((EnumDeserializer) deserializer);
} else {
return deserializer;
}
}
}