org.pentaho.metaverse.impl.model.kettle.json.KettleObjectMapper.java Source code

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/*! ******************************************************************************
 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2017 by Hitachi Vantara : http://www.pentaho.com
 *
 *******************************************************************************
 *
 * 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.
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package org.pentaho.metaverse.impl.model.kettle.json;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.Version;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import org.apache.commons.collections.CollectionUtils;

import java.io.IOException;
import java.util.List;

/**
 * User: RFellows Date: 2/16/15
 */
public class KettleObjectMapper {

    private ObjectMapper mapper;
    private SimpleModule transModule;

    public KettleObjectMapper(List<StdSerializer> serializers, List<StdDeserializer> deserializers) {
        mapper = new ObjectMapper();
        mapper.enable(SerializationFeature.INDENT_OUTPUT);
        mapper.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);
        mapper.enable(SerializationFeature.WRAP_EXCEPTIONS);

        transModule = new SimpleModule("PDIModule", new Version(1, 0, 0, null));

        if (!CollectionUtils.isEmpty(serializers)) {
            for (StdSerializer serializer : serializers) {
                transModule.addSerializer(serializer);
            }
        }

        if (!CollectionUtils.isEmpty(deserializers)) {
            for (StdDeserializer deserializer : deserializers) {
                transModule.addDeserializer(deserializer.getValueClass(), deserializer);
            }
        }

        mapper.registerModule(transModule);
    }

    public <T> T readValue(String json, Class<T> clazz) throws IOException {
        return mapper.readValue(json, clazz);
    }

    public String writeValueAsString(Object obj) throws JsonProcessingException {
        return mapper.writeValueAsString(obj);
    }
}