jadex.rules.state.io.xml.OAVObjectReaderHandler Maven / Gradle / Ivy
package jadex.rules.state.io.xml;
import java.util.List;
import java.util.Map;
import jadex.commons.SReflect;
import jadex.commons.transformation.BasicTypeConverter;
import jadex.commons.transformation.IStringObjectConverter;
import jadex.rules.state.IOAVState;
import jadex.rules.state.OAVAttributeType;
import jadex.rules.state.OAVJavaType;
import jadex.rules.state.OAVObjectType;
import jadex.xml.AttributeInfo;
import jadex.xml.IPostProcessor;
import jadex.xml.SXML;
import jadex.xml.StackElement;
import jadex.xml.SubobjectInfo;
import jadex.xml.TypeInfo;
import jadex.xml.bean.IBeanObjectCreator;
import jadex.xml.reader.AReadContext;
import jadex.xml.reader.IObjectReaderHandler;
import jadex.xml.reader.LinkData;
import jadex.xml.stax.QName;
/**
* Handler for reading XML into OAV objects.
*/
public class OAVObjectReaderHandler implements IObjectReaderHandler
{
//-------- constants --------
/** Key of the state in the user context map. */
public static final String CONTEXT_STATE = "state";
//-------- constructors --------
/**
* Create a new handler.
*/
public OAVObjectReaderHandler()
{
}
//-------- methods --------
/**
* Get the most specific mapping info.
* @param tag The tag.
* @param fullpath The full path.
* @return The most specific mapping info.
*/
public TypeInfo getTypeInfo(Object object, QName[] fullpath, AReadContext context)
{
return null;
}
/**
* Create an object for the current tag.
* @param type The object type to create.
* @param root Flag, if object should be root object.
* @param context The context.
* @return The created object (or null for none).
*/
public Object createObject(Object type, boolean root, AReadContext context, Map rawattributes) throws Exception
{
Object ret = null;
IOAVState state = (IOAVState)((Map)context.getUserContext()).get(CONTEXT_STATE);
if(type instanceof TypeInfo)
type = ((TypeInfo)type).getTypeInfo();
if(type instanceof OAVObjectType)
{
ret = root? state.createRootObject((OAVObjectType)type): state.createObject((OAVObjectType)type);
}
else if(type instanceof Class)
{
Class clazz = (Class)type;
if(!BasicTypeConverter.isBuiltInType(clazz))
{
// Must have empty constructor.
ret = clazz.newInstance();
}
}
else if(type instanceof IBeanObjectCreator)
{
ret = ((IBeanObjectCreator)type).createObject(context, rawattributes);
}
else if(type instanceof QName)
{
// System.out.println("here: "+typeinfo);
QName tag = (QName)type;
OAVObjectType oavtype = state.getTypeModel().getObjectType(tag.getLocalPart());
if(oavtype!=null)
{
ret = root? state.createRootObject(oavtype): state.createObject(oavtype);
}
}
return ret;
}
/**
* Get the object type
* @param object The object.
* @return The object type.
*/
public Object getObjectType(Object object, AReadContext context)
{
return ((IOAVState)context).getType(object);
}
/**
* Convert an object to another type of object.
*/
public Object convertContentObject(String object, QName tag, AReadContext context) throws Exception
{
Object ret = object;
if(tag.getNamespaceURI().startsWith(SXML.PROTOCOL_TYPEINFO))
{
String clazzname = tag.getNamespaceURI().substring(8)+"."+tag.getLocalPart();
Class clazz = SReflect.classForName0(clazzname, context.getClassLoader());
if(clazz!=null)
{
if(!BasicTypeConverter.isBuiltInType(clazz))
throw new RuntimeException("No converter known for: "+clazz);
ret = BasicTypeConverter.getBasicStringConverter(clazz).convertString(object, context);
}
}
// todo: also support OAVObjectTypes as tagname for conversion?
// else
// {
// IOAVState state = (IOAVState)context;
//
// OAVObjectType type = state.getTypeModel().getObjectType(tag.getLocalPart());
// if(type!=null)
// {
// ret = state.createObject(type);
// Collection attrs = type.getDeclaredAttributeTypes();
// }
// }
return ret;
}
/**
* Handle the attribute of an object.
* @param object The object.
* @param attrname The attribute name.
* @param attrval The attribute value.
* @param attrinfo The attribute info.
* @param context The context.
*/
public void handleAttributeValue(Object object, QName xmlattrname, List attrpath, String attrval,
Object attrinfo, AReadContext context) throws Exception
{
// todo: implement idref!
// if(xmlattrname!=null && xmlattrname.getLocalPart().equals("ref"))
// System.out.println("ref: "+xmlattrname);
// If attrval==null only set if default value available.
if(attrval==null && !(attrinfo instanceof AttributeInfo && ((AttributeInfo)attrinfo).getAccessInfo().getDefaultValue()!=null))
return;
IOAVState state = (IOAVState)((Map)context.getUserContext()).get(CONTEXT_STATE);
OAVAttributeType attrtype = null;
Object val = attrval;
if(attrinfo instanceof AttributeInfo)
{
AttributeInfo info = (AttributeInfo)attrinfo;
attrtype = (OAVAttributeType)info.getAttributeIdentifier();
if(val==null && info.getAccessInfo().getDefaultValue()!=null)
{
val = info.getAccessInfo().getDefaultValue();
}
else
{
IStringObjectConverter conv = ((AttributeInfo)info).getConverter();
if(conv!=null)
{
val = conv.convertString(attrval, null);
}
}
}
else if(attrinfo instanceof OAVAttributeType)
{
attrtype = (OAVAttributeType)attrinfo;
}
else if(attrinfo!=null)
{
StackElement se = context.getTopStackElement();
context.getReporter().report("Unknown attribute info: "+attrinfo, "attribute error", context, se.getLocation());
}
// Search attribute in type and supertypes.
if(attrtype==null)
{
int pathidx = 0;
String tmpname = xmlattrname.getLocalPart();
do
{
// System.out.println("tmpname: "+tmpname);
String attrnameplu = tmpname.endsWith("y")? tmpname.substring(0, tmpname.length()-1)+"ies": tmpname+"s";
// Search in object type and all super types
OAVObjectType tmptype = state.getType(object);
while(attrtype==null && tmptype!=null)
{
String tmpnamesin = tmptype.getName()+"_has_"+tmpname;
String tmpnameplu = tmptype.getName()+"_has_"+attrnameplu;
attrtype = tmptype.getDeclaredAttributeType0(tmpnamesin);
if(attrtype==null)
attrtype = tmptype.getDeclaredAttributeType0(tmpnameplu);
if(attrtype==null)
tmptype = tmptype.getSupertype();
}
// Search for outer tags
if(attrpath!=null && attrpath.size()>pathidx)
tmpname = ((QName)attrpath.get(pathidx)).getLocalPart();
pathidx++;
}
while(attrtype==null && attrpath!=null && attrpath.size()>=pathidx);
}
if(attrtype!=null)
{
try
{
Object arg = val instanceof String && attrtype.getType() instanceof OAVJavaType
&& BasicTypeConverter.isBuiltInType(((OAVJavaType)attrtype.getType()).getClazz())?
BasicTypeConverter.getBasicStringConverter((((OAVJavaType)attrtype.getType()).getClazz()))
.convertString(attrval, null): val;
setAttributeValue(state, object, attrtype, arg);
}
catch(Exception e)
{
StackElement se = context.getTopStackElement();
context.getReporter().report(e.toString(), "attribute error", context, se.getLocation());
}
}
else
{
StackElement se = context.getTopStackElement();
context.getReporter().report("Unhandled attribute: "+object+", "+xmlattrname+", "+attrpath, "unhandled attribute", context, se.getLocation());
}
}
/**
* Link an object to its parent.
* @param object The object.
* @param parent The parent object.
* @param linkinfo The link info.
* @param tagname The current tagname (for name guessing).
* @param context The context.
*/
public void linkObject(Object elem, Object parent, Object linkinfo, QName[] pathname, AReadContext context) throws Exception
{
IOAVState state = (IOAVState)((Map)context.getUserContext()).get(CONTEXT_STATE);
// int idx = pathname.lastIndexOf("/");
// String tagname = idx!=-1? pathname.substring(idx+1): pathname;
String tagname = pathname[pathname.length-1].getLocalPart();
// System.out.println("link: "+elem+" "+parent);
// Find attribute where to set/add the child element.
boolean linked = false;
OAVAttributeType attrtype = null;
if(linkinfo instanceof SubobjectInfo)
{
SubobjectInfo info = (SubobjectInfo)linkinfo;
// if(!(info.getAccessInfo().getObjectIdentifier() instanceof OAVAttributeType))
// {
// System.out.println("kldg");
// }
attrtype = (OAVAttributeType)info.getAccessInfo().getObjectIdentifier();
// todo:?
// IStringObjectConverter conv = info.getConverter();
// if(conv!=null)
// elem = conv.convertString(elem, null);
}
else if(linkinfo instanceof OAVAttributeType)
{
attrtype = (OAVAttributeType)linkinfo;
}
if(attrtype!=null)
{
setAttributeValue(state, parent, attrtype, elem);
linked= true;
}
if(!linked)
{
linked = internalLinkObjects(tagname, elem, parent, state);
}
if(!linked && !(state.getType(elem) instanceof OAVJavaType
&& BasicTypeConverter.isBuiltInType(((OAVJavaType)state.getType(elem)).getClazz())))
{
linked = internalLinkObjects(state.getType(elem).getName(), elem, parent, state);
}
if(!linked)
{
context.getReporter().report("Could not link: "+elem+" "+parent, "Could not link", context, context.getLocation());
// throw new RuntimeException("Could not link: "+elem+" "+parent);
}
}
/**
* Bulk link an object to its parent.
* @param parent The parent object.
* @param children The children objects (link datas).
* @param context The context.
* @param classloader The classloader.
* @param rootobject The root object.
*/
public void bulkLinkObjects(Object parent, List children, AReadContext context) throws Exception
{
// System.out.println("bulk link for: "+parent+" "+children);
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