/**
* 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.generator.jackson.output.serializer;
import com.cedarsoft.codegen.CodeGenerator;
import com.cedarsoft.codegen.Expressions;
import com.cedarsoft.codegen.NamingSupport;
import com.cedarsoft.codegen.model.DomainObjectDescriptor;
import com.cedarsoft.codegen.model.FieldDeclarationInfo;
import com.cedarsoft.codegen.model.FieldWithInitializationInfo;
import com.cedarsoft.serialization.generator.common.output.serializer.AbstractNamespaceBasedGenerator;
import com.cedarsoft.serialization.generator.common.output.serializer.AbstractXmlGenerator;
import com.cedarsoft.serialization.generator.common.output.serializer.SerializeToGenerator;
import com.cedarsoft.serialization.jackson.AbstractJacksonSerializer;
import com.cedarsoft.serialization.jackson.JacksonParserWrapper;
import com.sun.codemodel.JClass;
import com.sun.codemodel.JDefinedClass;
import com.sun.codemodel.JExpr;
import com.sun.codemodel.JMethod;
import com.sun.codemodel.JMod;
import com.sun.codemodel.JStatement;
import com.sun.codemodel.JVar;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.JsonProcessingException;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* Generator for stax mate based parsers
*/
public class JacksonGenerator extends AbstractNamespaceBasedGenerator {
public static final String METHOD_NAME_CLOSE_OBJECT = "closeObject";
@Nonnull
private final List<SerializeToGenerator> generators = new ArrayList<SerializeToGenerator>();
/**
* Creates a new generator
*
* @param codeGenerator the code generator
*/
public JacksonGenerator( @Nonnull CodeGenerator codeGenerator ) {
super( codeGenerator );
generators.add( new AsFieldGenerator( codeGenerator ) );
generators.add( new ArrayElementGenerator( codeGenerator ) );
generators.add( new DelegateGenerator( codeGenerator ) );
}
@Nonnull
@Override
protected String getNamespace( @Nonnull String domainObjectType ) {
int lastIndex = domainObjectType.lastIndexOf( '.' );
String simpleName;
if ( lastIndex == -1 ) {
simpleName = domainObjectType;
} else {
simpleName = domainObjectType.substring( lastIndex + 1 );
}
return NamingSupport.createXmlElementName( simpleName );
}
@Nonnull
@Override
protected JMethod createConstructor( @Nonnull JDefinedClass serializerClass, @Nonnull DomainObjectDescriptor domainObjectDescriptor ) {
JMethod constructor = serializerClass.constructor( JMod.PUBLIC );
constructor.body()
.invoke( METHOD_SUPER ).arg( getNamespace( domainObjectDescriptor.getQualifiedName() ) )
.arg( createDefaultVersionRangeInvocation( AbstractXmlGenerator.VERSION, AbstractXmlGenerator.VERSION ) );
return constructor;
}
@Nonnull
@Override
protected Map<FieldWithInitializationInfo, JVar> fillDeSerializationMethods( @Nonnull DomainObjectDescriptor domainObjectDescriptor, @Nonnull JDefinedClass serializerClass, @Nonnull JMethod serializeMethod, @Nonnull JMethod deserializeMethod ) {
try {
return super.fillDeSerializationMethods( domainObjectDescriptor, serializerClass, serializeMethod, deserializeMethod );
} finally {
//Call closeTag( deserializeFrom ); on deserialize
deserializeMethod.body().directStatement( "//Finally closing element" );
deserializeMethod.body().directStatement( "parser.closeObject();" ); //wrapper is somewhere hidden...
}
}
@Override
protected JVar createDeserializeWrapper( @Nonnull JMethod deserializeMethod, @Nonnull JVar deserializeFrom ) {
JClass wrapperType = codeGenerator.ref( JacksonParserWrapper.class );
return deserializeMethod.body().decl( wrapperType, "parser", JExpr._new( wrapperType ).arg( deserializeFrom ) );
}
@Override
@Nonnull
protected JVar appendDeserializeStatement( @Nonnull JDefinedClass serializerClass, @Nonnull JMethod deserializeMethod, @Nonnull JVar deserializeFrom, @Nullable JVar wrapper, @Nonnull JVar formatVersion, @Nonnull FieldWithInitializationInfo fieldInfo ) {
assert wrapper != null;
deserializeMethod.body().directStatement( "//" + fieldInfo.getSimpleName() );
SerializeToGenerator serializeToHandler = getGenerator( fieldInfo );
Expressions readExpressions = serializeToHandler.createReadFromDeserializeFromExpression( this, serializerClass, deserializeFrom, wrapper, formatVersion, fieldInfo );
//Add the (optional) statements before
for ( JStatement expression : readExpressions.getBefore() ) {
deserializeMethod.body().add( expression );
}
//The field
JVar field = deserializeMethod.body().decl( serializeToHandler.generateFieldType( fieldInfo ), fieldInfo.getSimpleName(), readExpressions.getExpression() );
//Add the optional statements after
for ( JStatement expression : readExpressions.getAfter() ) {
deserializeMethod.body().add( expression );
}
return field;
}
@Override
protected void appendSerializeStatement( @Nonnull JDefinedClass serializerClass, @Nonnull JMethod serializeMethod, @Nonnull JVar serializeTo, @Nonnull JVar object, @Nonnull JVar formatVersion, @Nonnull FieldWithInitializationInfo fieldInfo ) {
serializeMethod.body().directStatement( "//" + fieldInfo.getSimpleName() );
SerializeToGenerator serializeToHandler = getGenerator( fieldInfo );
serializeMethod.body().add( serializeToHandler.createAddToSerializeToExpression( this, serializerClass, serializeTo, fieldInfo, object, formatVersion ) );
}
@Nonnull
@Override
protected JClass createSerializerExtendsExpression( @Nonnull JClass domainType ) {
return codeGenerator.ref( AbstractJacksonSerializer.class ).narrow( domainType );
}
@Override
@Nonnull
protected Class<?> getExceptionType() {
return JsonProcessingException.class;
}
@Override
@Nonnull
protected Class<?> getSerializeFromType() {
return JsonParser.class;
}
@Override
@Nonnull
protected Class<?> getSerializeToType() {
return JsonGenerator.class;
}
@Nonnull
protected SerializeToGenerator getGenerator( @Nonnull FieldDeclarationInfo fieldInfo ) {
for ( SerializeToGenerator generator : generators ) {
if ( generator.canHandle( fieldInfo ) ) {
return generator;
}
}
throw new IllegalStateException( "No generator found for " + fieldInfo );
}
}