org.mayocat.jackson.OptionalStringDeserializer.java Source code

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Here is the source code for org.mayocat.jackson.OptionalStringDeserializer.java

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/*
 * Copyright (c) 2012, Mayocat <hello@mayocat.org>
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
package org.mayocat.jackson;

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 com.google.common.base.Optional;
import com.google.common.base.Strings;
import java.io.IOException;

/**
 * @version $Id: fbdf749476089ee1a46f42bc134292dee2d3aec9 $
 */
public class OptionalStringDeserializer extends JsonDeserializer<Optional<String>> {
    @Override
    public Optional<String> deserialize(JsonParser jsonParser, DeserializationContext deserializationContext)
            throws IOException, JsonProcessingException {
        if (Strings.isNullOrEmpty(jsonParser.getValueAsString())) {
            return Optional.absent();
        }
        return Optional.fromNullable(jsonParser.getValueAsString());
    }
}