[forge-issues] [JBoss JIRA] (FORGE-481) JavaParser.parse gets confused on inner classes

JavaParser.parse gets confused on inner classes ----------------------------------------------- Key: FORGE-481 URL: https://issues.jboss.org/browse/FORGE-481 Project: Forge Issue Type: Bug Reporter: Richard Kennard Assignee: Sandro Sonntag Fix For: 1.0.2.Final While developing the AeroGear scaffold, I discovered that if I do... {noformat} // Generate ObjectMapperProviderTemplate.jv JavaClass objectMapperProvider = JavaParser.parse(JavaClass.class, this.objectMapperProviderTemplate.render(context)); objectMapperProvider.setPackage(serviceBean.getPackage()); result.add(ScaffoldUtil.createOrOverwrite(this.prompt, java.getJavaResource(objectMapperProvider), objectMapperProvider.toString(), true)); {noformat} ...with a ObjectMapperProviderTemplate.jv of... {noformat} import java.io.IOException; import java.lang.reflect.Method; import javax.persistence.Entity; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.ws.rs.ext.ContextResolver; import javax.ws.rs.ext.Provider; import org.codehaus.jackson.JsonGenerator; import org.codehaus.jackson.JsonParser; import org.codehaus.jackson.JsonProcessingException; import org.codehaus.jackson.map.DeserializationConfig; import org.codehaus.jackson.map.DeserializationContext; import org.codehaus.jackson.map.JsonSerializer; import org.codehaus.jackson.map.ObjectMapper; import org.codehaus.jackson.map.SerializationConfig; import org.codehaus.jackson.map.SerializerProvider; import org.codehaus.jackson.map.deser.BeanDeserializer; import org.codehaus.jackson.map.deser.CustomDeserializerFactory; import org.codehaus.jackson.map.deser.StdDeserializerProvider; import org.codehaus.jackson.map.introspect.BasicBeanDescription; import org.codehaus.jackson.map.ser.BeanSerializer; import org.codehaus.jackson.map.ser.CustomSerializerFactory; import org.codehaus.jackson.type.JavaType; /** * Custom JSON ObjectMapper that knows how to lookup JPA entities based on ids. */ @Provider public class ObjectMapperProvider implements ContextResolver<ObjectMapper> { private final ObjectMapper mapper; @PersistenceContext private EntityManager entityManager; public ObjectMapperProvider() { this.mapper = new ObjectMapper(); // Serialize CustomSerializerFactory serializer = new CustomSerializerFactory() { @Override protected JsonSerializer<Object> constructBeanSerializer( SerializationConfig config, BasicBeanDescription beanDesc) { BeanSerializer beanSerializer = (BeanSerializer) super .constructBeanSerializer(config, beanDesc); return new JpaSerializer(beanSerializer); } }; this.mapper.setSerializerFactory(serializer); // Deserialize this.mapper.setDeserializerProvider(new StdDeserializerProvider( new CustomDeserializerFactory() { protected BeanDeserializer constructBeanDeserializerInstance( DeserializationConfig config, JavaType type, BasicBeanDescription beanDesc) { return new JpaDeserializer(type); } })); } @Override public ObjectMapper getContext(Class<?> type) { return this.mapper; } // // Inner classes // private class JpaSerializer extends JsonSerializer<Object> { private BeanSerializer delegate; private Method serializeFields; public JpaSerializer(BeanSerializer delegate) { this.delegate = delegate; try { this.serializeFields = BeanSerializer.class.getDeclaredMethod( "serializeFields", Object.class, JsonGenerator.class, SerializerProvider.class); } catch (Exception e) { throw new RuntimeException(e); } this.serializeFields.setAccessible(true); } @Override public void serialize(Object value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonProcessingException { jgen.writeStartObject(); // Special support for toString... provider.getKeySerializer().serialize("toString", jgen, provider); provider.findTypedValueSerializer(String.class, true).serialize( value.toString(), jgen, provider); // ...then delegate try { this.serializeFields.invoke(this.delegate, value, jgen, provider); } catch (Exception e) { throw new IOException(e); } jgen.writeEndObject(); } } private class JpaDeserializer extends BeanDeserializer { public JpaDeserializer(JavaType type) { super(type); } public Object deserializeFromString(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException { // Special support for JPA entities... if (this.getBeanClass().isAnnotationPresent(Entity.class)) { return ObjectMapperProvider.this.entityManager.find( this.getBeanClass(), Long.valueOf(jp.getText())); } // ...or delegate return super.deserializeFromString(jp, ctxt); } } } {noformat} ...then it ends up creating a Java file called JpaDeserializer.java, not ObjectMapperProvider.java. If I do... {noformat} // Generate ObjectMapperProviderTemplate.jv JavaClass objectMapperProvider = JavaParser.parse(JavaClass.class, this.objectMapperProviderTemplate.render(context)); objectMapperProvider.setPackage(serviceBean.getPackage()); result.add(ScaffoldUtil.createOrOverwrite(this.prompt, java.getJavaResource(serviceBean.getPackage() + ".ObjectMapperProvider.java"), objectMapperProvider.toString(), true)); {noformat} ...then it's fine.