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UnmodifiableSet Deserializer added to support Jackson 2.7+ #4078

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Original file line number Diff line number Diff line change
@@ -0,0 +1,61 @@
/*
* Copyright 2015-2016 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.security.jackson2;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;

import java.io.IOException;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

/**
* Custom deserializer for {@link UnmodifiableSetMixin}.
*
* @author Jitendra Singh
* @see UnmodifiableSetMixin
* @since 4.2
*/
class UnmodifiableSetDeserializer extends JsonDeserializer<Set> {

@Override
public Set deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
ObjectMapper mapper = (ObjectMapper) jp.getCodec();
JsonNode node = mapper.readTree(jp);
Set<Object> resultSet = new HashSet<Object>();
if (node != null) {
if (node instanceof ArrayNode) {
ArrayNode arrayNode = (ArrayNode) node;
Iterator<JsonNode> nodeIterator = arrayNode.iterator();
while (nodeIterator.hasNext()) {
JsonNode elementNode = nodeIterator.next();
resultSet.add(mapper.readValue(elementNode.toString(), Object.class));
}
} else {
resultSet.add(mapper.readValue(node.toString(), Object.class));
}
}
return Collections.unmodifiableSet(resultSet);
}
}
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;

import java.util.Set;

Expand All @@ -31,11 +32,13 @@
* </pre>
*
* @author Jitendra Singh
* @see UnmodifiableSetDeserializer
* @see CoreJackson2Module
* @see SecurityJacksonModules
* @since 4.2
*/
@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY)
@JsonDeserialize(using = UnmodifiableSetDeserializer.class)
class UnmodifiableSetMixin {

/**
Expand Down