com.basistech.rosette.dm.jackson.DmTypeIdResolver.java Source code

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Here is the source code for com.basistech.rosette.dm.jackson.DmTypeIdResolver.java

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/*
* Copyright 2014 Basis Technology Corp.
*
* 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.basistech.rosette.dm.jackson;

import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.databind.DatabindContext;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.jsontype.impl.TypeIdResolverBase;

/**
 * Jackson custom type info resolver for the data model.
 */
public class DmTypeIdResolver extends TypeIdResolverBase {

    @Override
    public void init(JavaType javaType) {
        //
    }

    @Override
    public String idFromValue(Object o) {
        return idFromValueAndType(o, o.getClass());
    }

    @Override
    public String idFromValueAndType(Object o, Class<?> aClass) {
        KnownAttribute attribute = KnownAttribute.getAttributeForClass(o.getClass());
        return attribute.key();
    }

    @Override
    public JavaType typeFromId(DatabindContext context, String id) {
        KnownAttribute attribute = KnownAttribute.getAttributeForKey(id);
        if (attribute == null) {
            attribute = KnownAttribute.UNKNOWN; // extension mechanism, build a BaseAttribute.
        }
        return context.constructType(attribute.attributeClass());
    }

    @Override
    public JsonTypeInfo.Id getMechanism() {
        return JsonTypeInfo.Id.CUSTOM;
    }
}