org.dswarm.graph.json.deserializer.PredicateDeserializer.java Source code

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Here is the source code for org.dswarm.graph.json.deserializer.PredicateDeserializer.java

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/**
 * Copyright (C) 2013  2015 SLUB Dresden & Avantgarde Labs GmbH (<code@dswarm.org>)
 *
 * 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.dswarm.graph.json.deserializer;

import java.io.IOException;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;

import org.dswarm.graph.json.Predicate;

public class PredicateDeserializer extends JsonDeserializer<Predicate> {

    @Override
    public Predicate deserialize(final JsonParser jp, final DeserializationContext ctxt)
            throws IOException, JsonProcessingException {

        final String predicateUri = jp.getValueAsString();

        if (predicateUri == null) {

            return null;
        }

        return new Predicate(predicateUri);
    }
}