org.camunda.spin.impl.json.jackson.format.JacksonJsonDataFormatMapper.java Source code

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Here is the source code for org.camunda.spin.impl.json.jackson.format.JacksonJsonDataFormatMapper.java

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/* 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.camunda.spin.impl.json.jackson.format;

import java.io.IOException;

import org.camunda.spin.impl.json.jackson.JacksonJsonLogger;
import org.camunda.spin.spi.DataFormatMapper;

import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.TypeFactory;

public class JacksonJsonDataFormatMapper implements DataFormatMapper {

    private static final JacksonJsonLogger LOG = JacksonJsonLogger.JSON_TREE_LOGGER;

    protected JacksonJsonDataFormat format;

    public JacksonJsonDataFormatMapper(JacksonJsonDataFormat format) {
        this.format = format;
    }

    public boolean canMap(Object parameter) {
        ObjectMapper objectMapper = format.getObjectMapper();
        if (parameter != null) {
            return objectMapper.canSerialize(parameter.getClass());
        } else {
            return false;
        }
    }

    public String getCanonicalTypeName(Object object) {
        return format.getCanonicalTypeName(object);
    }

    public Object mapJavaToInternal(Object parameter) {
        ObjectMapper mapper = format.getObjectMapper();
        try {
            return mapper.valueToTree(parameter);
        } catch (IllegalArgumentException e) {
            throw LOG.unableToMapInput(parameter, e);
        }
    }

    public <T> T mapInternalToJava(Object parameter, Class<T> type) {
        JavaType javaType = TypeFactory.defaultInstance().constructType(type);
        T result = mapInternalToJava(parameter, javaType);
        return result;
    }

    public <T> T mapInternalToJava(Object parameter, String typeIdentifier) {
        JavaType javaType = format.constructJavaTypeFromCanonicalString(typeIdentifier);
        T result = mapInternalToJava(parameter, javaType);
        return result;
    }

    public <C> C mapInternalToJava(Object parameter, JavaType type) {
        JsonNode jsonNode = (JsonNode) parameter;
        ObjectMapper mapper = format.getObjectMapper();
        try {
            return mapper.readValue(mapper.treeAsTokens(jsonNode), type);
        } catch (IOException e) {
            throw LOG.unableToDeserialize(jsonNode, type, e);
        }
    }

}