com.cedarsoft.serialization.jackson.NullSerializer.java Source code

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Here is the source code for com.cedarsoft.serialization.jackson.NullSerializer.java

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/**
 * Copyright (C) cedarsoft GmbH.
 *
 * Licensed under the GNU General Public License version 3 (the "License")
 * with Classpath Exception; you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *         http://www.cedarsoft.org/gpl3ce
 *         (GPL 3 with Classpath Exception)
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 3 only, as
 * published by the Free Software Foundation. cedarsoft GmbH designates this
 * particular file as subject to the "Classpath" exception as provided
 * by cedarsoft GmbH in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 3 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 3 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact cedarsoft GmbH, 72810 Gomaringen, Germany,
 * or visit www.cedarsoft.com if you need additional information or
 * have any questions.
 */

package com.cedarsoft.serialization.jackson;

import com.cedarsoft.serialization.SerializationException;
import com.cedarsoft.version.Version;
import com.cedarsoft.version.VersionException;
import com.cedarsoft.version.VersionRange;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.JsonToken;

import javax.annotation.Nullable;

import javax.annotation.Nonnull;
import javax.inject.Inject;
import java.io.IOException;
import java.io.InputStream;

/**
 *
 * @noinspection RefusedBequest, NullableProblems
 */
public class NullSerializer extends AbstractJacksonSerializer<Void> {
    @Nonnull
    public static final NullSerializer INSTANCE = new NullSerializer();

    @Inject
    public NullSerializer() {
        super("void", VersionRange.single(1, 0, 0));
    }

    @Override
    public void serialize(@Nonnull JsonGenerator serializeTo, @Nullable Void object, @Nonnull Version formatVersion)
            throws IOException, VersionException, JsonProcessingException {
        serializeTo.writeNull();
    }

    @Nonnull
    @Override
    public Void deserialize(@Nonnull JsonParser deserializeFrom, @Nonnull Version formatVersion)
            throws IOException, VersionException, JsonProcessingException {
        throw new UnsupportedOperationException();
    }

    @Nullable
    @Override
    public Void deserialize(@Nonnull JsonParser parser)
            throws IOException, JsonProcessingException, SerializationException {
        JacksonParserWrapper parserWrapper = new JacksonParserWrapper(parser);
        parserWrapper.nextToken();
        parserWrapper.verifyCurrentToken(JsonToken.VALUE_NULL);
        //noinspection ConstantConditions
        return null;
    }

    @Nullable
    @Override
    public Void deserialize(@Nonnull InputStream in) throws IOException, VersionException {
        //noinspection ConstantConditions
        return null;
    }

    @Override
    public boolean isObjectType() {
        return false;
    }
}