private EPCObject findParent(string key, ref List <KeyValuePair <string, EPCObject> > parentChild, ref EPCObject epcObj, Dictionary <string, EPCObject> objList, List <EPCObject> listObjects)
{
// match the key to the value
for (int i = 0; i < parentChild.Count;)
{
if (parentChild[i].Value.Equals(key))
{
String name = parentChild[i].Key;;
EPCObject parent = getEPCObject(name, listObjects);
parent.EpcFileName = name;
parent.Children.Add(epcObj);
parentChild.RemoveAt(i);
findParent(name, ref parentChild, ref parent, objList, listObjects);
if (!objList.ContainsKey(key))
{
objList.Add(key, epcObj);
}
// return the new created object.
return(parent);
}
else
{
i++;
}
}
if (!objList.ContainsKey(key))
{
objList.Add(key, epcObj);
}
return(epcObj);
}
private EPCObject regroup(int index, List <KeyValuePair <string, EPCObject> > parentChild, Dictionary <string, EPCObject> objList, List <EPCObject> listObjects)
{
EPCObject topObject = null;
EPCObject epcObj = null;
bool loop = false;
if (index > parentChild.Count - 1)
{
return(topObject);
}
String key = parentChild[index].Key;
epcObj = getEPCObject(key, listObjects);
// prevent the loop that key exist in chain of values.
// find child value when the key is same
findChild(key, ref parentChild, ref epcObj, objList, listObjects);
// find the value is the key of parent.
topObject = findParent(key, ref parentChild, ref epcObj, objList, listObjects);
if (loop)
{
throw new Exception("the parent child relationship in EPC file has loop recurrence!");
}
return(topObject);
}
private void findChild(string key, ref List <KeyValuePair <string, EPCObject> > parentChild, ref EPCObject epcObj, Dictionary <string, EPCObject> objList, List <EPCObject> listObjects)
{
if (objList.ContainsKey(key))
{
epcObj = objList[key];
}
else
{
for (int i = 0; i < parentChild.Count;)
{
// if key match
if (parentChild[i].Key.Equals(key))
{
if (epcObj.Children == null)
{
epcObj.Children = new List <EPCObject>();
}
//create sub level object child
String name = parentChild[i].Value.EpcFileName;;
//child.EpcFileName = name;
EPCObject child = getEPCObject(name, listObjects);
if (child != null)
{
// prevent duplicate item and add the child object to epcobject.
if (!isExists(epcObj.Children, name))
{
epcObj.Children.Add(child);
}
// remove from parentchild list.
parentChild.RemoveAt(i);
// build the child heiarchy structure.
findChild(child.EpcFileName, ref parentChild, ref child, objList, listObjects);
// if store doesn't contain, add
if (!objList.ContainsKey(child.EpcFileName))
{
objList.Add(child.EpcFileName, child);
}
}
else
{
break;
}
}
else
{
i++;
}
}
}
// add the epcobject back.
if (!objList.ContainsKey(key))
{
objList.Add(key, epcObj);
}
}
/// <summary>
/// base on the parant and child string pair, this function try to create the hiearchy structure
/// the topObjectList contains only root parent object.
/// objList is dictionary that help speed the algorithm- if the parent -child already form, no longer need to reform again.
/// </summary>
/// <param name="parentChild"> key value pair with parent and child string</param>
/// <param name="listObjects"> referencing epcobject collection </param>
/// <returns>root hierarchy object collection.</returns>
private Dictionary <string, EPCObject> sortHierarchy(List <KeyValuePair <string, EPCObject> > parentChild, List <EPCObject> listObjects)
{
Dictionary <string, EPCObject> topObjectList = new Dictionary <string, EPCObject>();
Dictionary <string, EPCObject> objList = new Dictionary <string, EPCObject>();
for (int i = 0; i < parentChild.Count; i++)
{
EPCObject top = regroup(i, parentChild, objList, listObjects);
if (!topObjectList.ContainsKey(top.EpcFileName))
{
topObjectList.Add(top.EpcFileName, top);
}
//parentChild.RemoveAt(i);
}
if (objList.Count > 0)
{
objList.Clear();
}
return(topObjectList);
}
/// <summary>
/// loadInstance is to handle the energistcs data instance.
/// </summary>
/// <param name="epcObject"></param>
/// <returns></returns>
public static Object loadInstance(EPCObject epcObject)
{
if (epcObject == null)
{
return(null);
}
ObjectHandle demoObject = createInance(epcObject);
if (demoObject != null)
{
string xmlcontent = EPCReader.createInstance().getEPCFIleText(epcObject.PackageFile, epcObject.Uri.ToString());
// only load the xml , we can confirm the uuid from real document , otherwise it derieves from the filename.
epcObject.Uuid = getUuid(epcObject.EPCObjectType, xmlcontent);
// convert the stream to the energistics object.
Type type = demoObject.Unwrap().GetType();
Object partEnergisticsObject = EnergisticsConverter.XmlToObject(type, xmlcontent, Encoding.UTF8);
return(partEnergisticsObject);
}
else
{
return(null);
}
}
// read file property in core.xml, find out the creator, datatime...
// read [content_types].xml, find out the total file contains in the zip.
// read _rels folder, find out the files relationship, find out the child of objects.
// .rels contains define the ocreproperties.
public EPCDataView readEPCFile(String epcPathFile)
{
// must has [content_Types].xml
// /_rels/.rels must contain at least the metadata/core-properties and target. which resqml example doesnt' following.
// core properties should contains creator, created, version description, id, title
Dictionary <string, EPCObject> TopObjectList = new Dictionary <string, EPCObject>();
List <EPCObject> listObjects = new List <EPCObject>();
EPCCoreProperty epcCore = new EPCCoreProperty();
List <KeyValuePair <String, EPCObject> > parentChild = new List <KeyValuePair <String, EPCObject> >();
try
{
using (ZipPackage package = (ZipPackage)Package.Open(epcPathFile, FileMode.Open, FileAccess.Read))
{
PackageRelationshipCollection packageRels = package.GetRelationships();
//package Rels must contains id "CoreProperties" property. getTargetUri directory.
String sourceURI = "";
String coreURI = getCorePropertyURI(packageRels, ref sourceURI);
PackagePartCollection packageParts = package.GetParts();
foreach (PackagePart packagepart in packageParts)
{
// match the coreURI.
// find the coreProperty
if ((packagepart.Uri != null) && (packagepart.Uri.Equals(sourceURI + coreURI)))
{
epcCore.Creator = packagepart.Package.PackageProperties.Creator;
epcCore.Created = packagepart.Package.PackageProperties.Created;
epcCore.Version = packagepart.Package.PackageProperties.Version;
epcCore.Description = packagepart.Package.PackageProperties.Description;
epcCore.Identifier = packagepart.Package.PackageProperties.Identifier;
epcCore.Keywords = packagepart.Package.PackageProperties.Keywords;
epcCore.Title = packagepart.Package.PackageProperties.Title;
}
else
{
// create each epcobject for package part
if (isPart(packagepart))
{
EPCObject epcObject = new EPCObject();
String epcContentType = "";
String version = "";
String epcObjectType = "";
EPCPartValidator.parseContentType(packagepart.ContentType, ref epcContentType, ref version, ref epcObjectType);
epcObject.EpcContentType = epcContentType;
epcObject.EPCObjectType = epcObjectType;
epcObject.SchemaVersion = version;
epcObject.PackageFile = epcPathFile;
epcObject.EpcFileName = this.getfilename(packagepart.Uri.ToString());
epcObject.Uuid = this.getuuid(packagepart.Uri.ToString());
epcObject.Uri = packagepart.Uri;
listObjects.Add(epcObject);
//get rest relationship items
PackageRelationshipCollection partRels = null;
try
{
if (packagepart != null)
{
partRels = packagepart.GetRelationships();
}
}
catch (Exception e)
{
Console.WriteLine("warning : " + e.Message);
}
if (partRels != null)
{
// create pair key for relationships parent and child
foreach (PackageRelationship partsRel in partRels)
{
EPCRelationshipType epcrelType = EPCPartValidator.getRelationshipType(partsRel.RelationshipType);
// conver the target and source into the parent and child table.
if ((epcrelType == EPCRelationshipType.destinationObject) ||
(epcrelType == EPCRelationshipType.mlToExternalPartProxy) ||
(epcrelType == EPCRelationshipType.destinationMedia) ||
(epcrelType == EPCRelationshipType.externalResource) ||
(epcrelType == EPCRelationshipType.chunkedPart)
)
{
string name = getfilename(packagepart.Uri.ToString());
//string childname = getfilename(partsRel.TargetUri.ToString());
EPCObject obj = new EPCObject();
obj.TargetMode = partsRel.TargetMode;;
obj.EpcFileName = partsRel.TargetUri.ToString();
if ((obj.TargetMode == TargetMode.External) && (obj.EpcFileName.EndsWith(".h5")))
{
obj.HDF5 = true;
epcObject.EpcFileName = obj.EpcFileName;
epcObject.HDF5 = true;
}
KeyValuePair <string, EPCObject> pair = new KeyValuePair <string, EPCObject>(name, obj);
if (!isDuplicated(parentChild, pair))
{
parentChild.Add(pair);
}
//else
//Console.WriteLine("source already add in. skip ...");
}
if ((epcrelType == EPCRelationshipType.sourceObject) ||
(epcrelType == EPCRelationshipType.extenalPartProxyToMI) ||
(epcrelType == EPCRelationshipType.sourceMedia))
{
string name = getfilename(partsRel.TargetUri.ToString());
string childname = getfilename(packagepart.Uri.ToString());
EPCObject obj = new EPCObject();
obj.TargetMode = partsRel.TargetMode;;
obj.EpcFileName = childname;
KeyValuePair <string, EPCObject> pair = new KeyValuePair <string, EPCObject>(name, obj);
if (!isDuplicated(parentChild, pair))
{
parentChild.Add(pair);
}
//else
//Console.WriteLine("source already add in. skip ...");
}
}
}
}
}
}
//sort the hierachy from the pair
listObjects.Sort(new EPCObjectComparer());
TopObjectList = sortHierarchy(parentChild, listObjects);
// assign to dataviewer.
EPCDataView dataviewer = new EPCDataView();
dataviewer.TopObjectList = TopObjectList;
dataviewer.ListObjects = listObjects;
dataviewer.EpcCoreProperty = epcCore;
return(dataviewer);
}
}catch (Exception e)
{
throw new Exception(String.Format("the file is not validate EPC file : {0} ", e.Message));
}
}
/// <summary>
/// create the object bese on the contenttype "resqml, witsml, prodml" and version
/// </summary>
/// <param name="epcObject"></param>
/// <returns></returns>
private static ObjectHandle createInance(EPCObject epcObject)
{
// the content type is energistcs standard
// create the instance from the name.
String assemblyName = "";
String className = "";
// resqml
if (epcObject.EpcContentType.Equals(RESQML))
{
assemblyName = "Energistics.DataAccess";
//here need to change in future.
if (epcObject.SchemaVersion == "2.0")
{
className = "Energistics.DataAccess.RESQML201";
epcObject.EPCObjectType = epcObject.EPCObjectType.Replace("obj_", "");
}
if (epcObject.SchemaVersion == "1.1")
{
className = "Energistics.DataAccess.RESQML110";
}
}
else //prodml
if (epcObject.EpcContentType.Equals(PRODML))
{
assemblyName = "Energistics.DataAccess";
if (epcObject.SchemaVersion == "2.0")
{
className = "Energistics.DataAccess.PRODML200";
epcObject.EPCObjectType = epcObject.EPCObjectType.Replace("obj_", "");
}
if (epcObject.SchemaVersion.Contains("1.2"))
{
className = "Energistics.DataAccess.PRODML122";
}
if (epcObject.SchemaVersion.Contains("1.3"))
{
className = "Energistics.DataAccess.PRODML131";
}
}
else //witsml
if (epcObject.EpcContentType.Equals(WITSML))
{
assemblyName = "Energistics.DataAccess";
if (epcObject.SchemaVersion == "2.0")
{
className = "Energistics.DataAccess.WITSML200";
epcObject.EPCObjectType = epcObject.EPCObjectType.Replace("obj_", "");
}
if (epcObject.SchemaVersion.Contains("1.3.1"))
{
className = "Energistics.DataAccess.WITSML131";
}
if (epcObject.SchemaVersion.Contains("1.4.1"))
{
className = "Energistics.DataAccess.WITSML141";
}
}
else
{
Console.WriteLine("none -energistics object is defined." + epcObject.EPCObjectType);
return(null);
}
String objname = epcObject.EPCObjectType;
ObjectHandle demoObject = createInstance(assemblyName, className, objname);
if (demoObject == null)
{
throw new Exception("can't initialize the class.");
}
return(demoObject);
}
