public virtual object createId(EntityMetaData metaData, string @string)
{
Type type = metaData.IdType;
// According to JPA-spec all primitive types (and wrappers) are supported, String, util.Date, sql.Date,
// BigDecimal and BigInteger
if (type == typeof(Long) || type == typeof(long))
{
return(long.Parse(@string));
}
else if (type == typeof(string))
{
return(@string);
}
else if (type == typeof(Byte) || type == typeof(sbyte))
{
return(sbyte.Parse(@string));
}
else if (type == typeof(Short) || type == typeof(short))
{
return(short.Parse(@string));
}
else if (type == typeof(Integer) || type == typeof(int))
{
return(int.Parse(@string));
}
else if (type == typeof(Float) || type == typeof(float))
{
return(float.Parse(@string));
}
else if (type == typeof(Double) || type == typeof(double))
{
return(double.Parse(@string));
}
else if (type == typeof(Character) || type == typeof(char))
{
return(new char?(@string[0]));
}
else if (type == typeof(DateTime))
{
return(new DateTime(long.Parse(@string)));
}
else if (type == typeof(java.sql.Date))
{
return(new java.sql.Date(long.Parse(@string)));
}
else if (type == typeof(decimal))
{
return(new decimal(@string));
}
else if (type == typeof(BigInteger))
{
return(new BigInteger(@string));
}
else
{
//JAVA TO C# CONVERTER WARNING: The .NET Type.FullName property will not always yield results identical to the Java Class.getName method:
throw new ProcessEngineException("Unsupported Primary key type for JPA-Entity: " + type.FullName);
}
}
private object getIdValue(object value, EntityMetaData metaData)
{
try
{
if (metaData.IdMethod != null)
{
return(metaData.IdMethod.invoke(value));
}
else if (metaData.IdField != null)
{
return(metaData.IdField.get(value));
}
}
catch (System.ArgumentException iae)
{
throw new ProcessEngineException("Illegal argument exception when getting value from id method/field on JPAEntity", iae);
}
catch (IllegalAccessException iae)
{
throw new ProcessEngineException("Cannot access id method/field for JPA Entity", iae);
}
catch (InvocationTargetException ite)
{
throw new ProcessEngineException("Exception occured while getting value from id field/method on JPAEntity: " + ite.InnerException.Message, ite.InnerException);
}
// Fall trough when no method and field is set
throw new ProcessEngineException("Cannot get id from JPA Entity, no id method/field set");
}
public virtual string getJPAIdString(object value)
{
EntityMetaData metaData = getEntityMetaData(value.GetType());
if (!metaData.JPAEntity)
{
throw new ProcessEngineException("Object is not a JPA Entity: class='" + value.GetType() + "', " + value);
}
object idValue = getIdValue(value, metaData);
return(getIdString(idValue));
}
private EntityMetaData getEntityMetaData(Type clazz)
{
//JAVA TO C# CONVERTER WARNING: The .NET Type.FullName property will not always yield results identical to the Java Class.getName method:
EntityMetaData metaData = classMetaDatamap[clazz.FullName];
if (metaData == null)
{
// Class not present in meta-data map, create metaData for it and add
metaData = scanClass(clazz);
//JAVA TO C# CONVERTER WARNING: The .NET Type.FullName property will not always yield results identical to the Java Class.getName method:
classMetaDatamap[clazz.FullName] = metaData;
}
return(metaData);
}
public virtual string getJPAClassString(object value)
{
ensureNotNull("null value cannot be saved", "value", value);
EntityMetaData metaData = getEntityMetaData(value.GetType());
if (!metaData.JPAEntity)
{
throw new ProcessEngineException("Object is not a JPA Entity: class='" + value.GetType() + "', " + value);
}
// Extract the ID from the Entity instance using the metaData
//JAVA TO C# CONVERTER WARNING: The .NET Type.FullName property will not always yield results identical to the Java Class.getName method:
return(metaData.EntityClass.FullName);
}
public virtual object getJPAEntity(string className, string idString)
{
Type entityClass = null;
entityClass = ReflectUtil.loadClass(className);
EntityMetaData metaData = getEntityMetaData(entityClass);
ensureNotNull("Class is not a JPA-entity: " + className, "metaData", metaData);
// Create primary key of right type
object primaryKey = createId(metaData, idString);
return(findEntity(entityClass, primaryKey));
}
public virtual EntityMetaData scanClass(Type clazz)
{
EntityMetaData metaData = new EntityMetaData();
metaData.EntityClass = clazz;
// Class should have @Entity annotation
bool isEntity = isEntityAnnotationPresent(clazz);
metaData.JPAEntity = isEntity;
if (isEntity)
{
// Try to find a field annotated with @Id
System.Reflection.FieldInfo idField = getIdField(clazz);
if (idField != null)
{
metaData.IdField = idField;
}
else
{
// Try to find a method annotated with @Id
System.Reflection.MethodInfo idMethod = getIdMethod(clazz);
if (idMethod != null)
{
metaData.IdMethod = idMethod;
}
else
{
//JAVA TO C# CONVERTER WARNING: The .NET Type.FullName property will not always yield results identical to the Java Class.getName method:
throw new ProcessEngineException("Cannot find field or method with annotation @Id on class '" + clazz.FullName + "', only single-valued primary keys are supported on JPA-enities");
}
}
}
return(metaData);
}
