Java tutorial
/** * Copyright 2015 The Javaslang 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 javaslang.jackson.datatype.deserialize; import com.fasterxml.jackson.core.JsonParser; import com.fasterxml.jackson.core.JsonToken; import com.fasterxml.jackson.databind.DeserializationContext; import com.fasterxml.jackson.databind.JavaType; import javaslang.Tuple; import javaslang.Tuple2; import javaslang.collection.HashMap; import javaslang.collection.LinkedHashMap; import javaslang.collection.Map; import javaslang.collection.TreeMap; import java.io.IOException; class MapDeserializer extends MaplikeDeserializer<Map<?, ?>> { private static final long serialVersionUID = 1L; MapDeserializer(JavaType valueType) { super(valueType); } @Override public Map<?, ?> deserialize(JsonParser p, DeserializationContext ctxt) throws IOException { final java.util.List<Tuple2<Object, Object>> result = new java.util.ArrayList<>(); while (p.nextToken() != JsonToken.END_OBJECT) { String name = p.getCurrentName(); Object key = keyDeserializer.deserializeKey(name, ctxt); p.nextToken(); result.add(Tuple.of(key, valueDeserializer.deserialize(p, ctxt))); } if (TreeMap.class.isAssignableFrom(handledType())) { return TreeMap.ofEntries(keyComparator, result); } if (LinkedHashMap.class.isAssignableFrom(handledType())) { return LinkedHashMap.ofEntries(result); } // default deserialization [...] -> Map return HashMap.ofEntries(result); } }