com.cedarsoft.serialization.jackson.test.RoleSerializer.java Source code

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Here is the source code for com.cedarsoft.serialization.jackson.test.RoleSerializer.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.test;

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

import javax.annotation.Nonnull;
import java.io.IOException;

/**
 * @author Johannes Schneider (<a href="mailto:js@cedarsoft.com">js@cedarsoft.com</a>)
 */
public class RoleSerializer extends AbstractJacksonSerializer<Role> {

    public static final String PROPERTY_ID = "id";

    public static final String PROPERTY_DESCRIPTION = "description";

    public RoleSerializer() {
        super("role", VersionRange.from(1, 0, 0).to());
    }

    @Override
    public void serialize(@Nonnull JsonGenerator serializeTo, @Nonnull Role object, @Nonnull Version formatVersion)
            throws IOException, VersionException, JsonProcessingException {
        serializeTo.writeNumberField(PROPERTY_ID, object.getId());
        serializeTo.writeStringField(PROPERTY_DESCRIPTION, object.getDescription());
    }

    @Nonnull
    @Override
    public Role deserialize(@Nonnull JsonParser deserializeFrom, @Nonnull Version formatVersion)
            throws IOException, VersionException, JsonProcessingException {
        int id = -1;
        String description = null;

        JacksonParserWrapper parser = new JacksonParserWrapper(deserializeFrom);

        while (parser.nextToken() == JsonToken.FIELD_NAME) {
            String currentName = parser.getCurrentName();

            if (currentName.equals(PROPERTY_ID)) {
                parser.nextToken(JsonToken.VALUE_NUMBER_INT);
                id = parser.getIntValue();
                continue;
            }

            if (currentName.equals(PROPERTY_DESCRIPTION)) {
                parser.nextToken(JsonToken.VALUE_STRING);
                description = parser.getText();
                continue;
            }

            throw new IllegalStateException("Unexpected field reached <" + currentName + ">");
        }

        //Verify
        parser.verifyDeserialized(id, PROPERTY_ID);
        parser.verifyDeserialized(description, PROPERTY_DESCRIPTION);
        assert description != null;

        parser.verifyCurrentToken(JsonToken.END_OBJECT);
        return new Role(id, description);
    }
}