/**
* 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.couchdb.io;
import com.cedarsoft.couchdb.core.ActionFailedException;
import com.cedarsoft.serialization.jackson.JacksonParserWrapper;
import com.cedarsoft.serialization.jackson.JacksonSupport;
import com.cedarsoft.version.VersionException;
import com.fasterxml.jackson.core.JsonEncoding;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import org.apache.commons.io.input.TeeInputStream;
import javax.annotation.Nonnull;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
*
*/
public class ActionFailedExceptionSerializer {
@Nonnull
public static final String PROPERTY_ERROR = "error";
@Nonnull
public static final String PROPERTY_REASON = "reason";
public void serialize( @Nonnull ActionFailedException object, @Nonnull OutputStream out ) throws IOException {
JsonFactory jsonFactory = JacksonSupport.getJsonFactory();
JsonGenerator generator = jsonFactory.createJsonGenerator( out, JsonEncoding.UTF8 );
generator.writeStartObject();
serialize( generator, object );
generator.writeEndObject();
generator.close();
}
@Nonnull
public ActionFailedException deserialize( int status, @Nonnull InputStream in ) throws VersionException, IOException {
try ( MaxLengthByteArrayOutputStream teedOut = new MaxLengthByteArrayOutputStream(); TeeInputStream teeInputStream = new TeeInputStream( in, teedOut ) ) {
JsonFactory jsonFactory = JacksonSupport.getJsonFactory();
JsonParser parser = jsonFactory.createJsonParser( teeInputStream );
JacksonParserWrapper parserWrapper = new JacksonParserWrapper( parser );
parserWrapper.nextToken( JsonToken.START_OBJECT );
String error = null;
String reason = null;
while ( parser.nextToken() == JsonToken.FIELD_NAME ) {
String currentName = parser.getCurrentName();
if ( currentName.equals( PROPERTY_ERROR ) ) {
parserWrapper.nextToken( JsonToken.VALUE_STRING );
error = parser.getText();
continue;
}
if ( currentName.equals( PROPERTY_REASON ) ) {
parserWrapper.nextToken( JsonToken.VALUE_STRING );
reason = parser.getText();
continue;
}
throw new IllegalStateException( "Unexpected field reached <" + currentName + ">" );
}
parserWrapper.verifyDeserialized( error, PROPERTY_ERROR );
parserWrapper.verifyDeserialized( reason, PROPERTY_REASON );
assert reason != null;
assert error != null;
parserWrapper.ensureObjectClosed();
return new ActionFailedException( status, error, reason, teedOut.toByteArray() );
}
}
public void serialize( @Nonnull JsonGenerator serializeTo, @Nonnull ActionFailedException object ) throws IOException {
serializeTo.writeStringField( PROPERTY_ERROR, object.getError() );
serializeTo.writeStringField( PROPERTY_REASON, object.getReason() );
}
}