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

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Here is the source code for org.camunda.spin.impl.json.jackson.format.ListJacksonJsonTypeDetector.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.util.List;

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

public class ListJacksonJsonTypeDetector extends AbstractJacksonJsonTypeDetector {

    public boolean canHandle(Object object) {
        return object instanceof List;
    }

    public String detectType(Object object) {
        return constructType(object).toCanonical();
    }

    protected JavaType constructType(Object object) {
        TypeFactory typeFactory = TypeFactory.defaultInstance();

        if (object instanceof List && !((List<?>) object).isEmpty()) {
            List<?> list = (List<?>) object;
            Object firstElement = list.get(0);
            return typeFactory.constructCollectionType(list.getClass(), constructType(firstElement));

        } else {
            return typeFactory.constructType(object.getClass());
        }
    }

}