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from xml.dom.minidom import Document |
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from niprov.format import Format |
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## Decided not to go with prov python lib as it depends on lxml which depends on c binaries |
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class XmlFormat(Format): |
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def __init__(self, dependencies): |
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super(XmlFormat, self).__init__(dependencies) |
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self.fileExtension = 'xml' |
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def serializeSingle(self, item): |
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return self.serializeList([item]) |
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def serializeList(self, itemOrList): |
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prov = 'http://www.w3.org/ns/prov#' |
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nfo = 'http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#' |
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dct = 'http://purl.org/dc/terms/' |
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dom = Document() |
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doc = dom.createElementNS(prov, 'prov:document') |
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doc.setAttribute('xmlns:prov', prov) |
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doc.setAttribute('xmlns:nfo', nfo) |
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doc.setAttribute('xmlns:dct', dct) |
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dom.appendChild(doc) |
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for i, item in enumerate(itemOrList): |
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entity = dom.createElementNS(prov, 'prov:entity') |
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entityId = 'niprov:file'+str(i) |
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entity.setAttribute('id', entityId) |
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fileUrl = dom.createElementNS(nfo, 'nfo:fileUrl') |
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fileUrlVal = dom.createTextNode(item.location.toUrl()) |
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fileUrl.appendChild(fileUrlVal) |
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entity.appendChild(fileUrl) |
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if 'size' in item.provenance: |
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fileSize = dom.createElementNS(nfo, 'nfo:fileSize') |
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fileSizeVal = dom.createTextNode(str(item.provenance['size'])) |
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fileSize.appendChild(fileSizeVal) |
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entity.appendChild(fileSize) |
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if 'created' in item.provenance: |
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fileLastMod = dom.createElementNS(nfo, 'nfo:fileLastModified') |
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fileLastModVal = dom.createTextNode(item.provenance['created'].isoformat()) |
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fileLastMod.appendChild(fileLastModVal) |
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entity.appendChild(fileLastMod) |
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if 'hash' in item.provenance: |
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fileHash = dom.createElementNS(nfo, 'nfo:FileHash') |
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hashId = entityId+'.hash' |
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fileHash.setAttribute('id', hashId) |
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hashAlgo = dom.createElementNS(nfo, 'nfo:hashAlgorithm') |
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hashAlgoVal = dom.createTextNode('MD5') |
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hashAlgo.appendChild(hashAlgoVal) |
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fileHash.appendChild(hashAlgo) |
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hashValue = dom.createElementNS(nfo, 'nfo:hashValue') |
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hashValueVal = dom.createTextNode(item.provenance['hash']) |
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hashValue.appendChild(hashValueVal) |
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fileHash.appendChild(hashValue) |
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hasHash = dom.createElementNS(nfo, 'nfo:hasHash') |
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hasHashVal = dom.createTextNode(hashId) |
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hasHash.appendChild(hasHashVal) |
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entity.appendChild(hasHash) |
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doc.appendChild(fileHash) |
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if 'transformation' in item.provenance: |
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act = dom.createElementNS(prov, 'prov:activity') |
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activityId = entityId+'.xform' |
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act.setAttribute('id', activityId) |
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actTitle = dom.createElementNS(dct, 'dct:title') |
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actTitleVal = dom.createTextNode(item.provenance['transformation']) |
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actTitle.appendChild(actTitleVal) |
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act.appendChild(actTitle) |
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doc.appendChild(act) |
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wasGen = dom.createElementNS(prov, 'prov:wasGeneratedBy') |
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entityRef = dom.createElementNS(prov, 'prov:entity') |
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entityRef.setAttribute('prov:ref', entityId) |
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wasGen.appendChild(entityRef) |
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activityRef = dom.createElementNS(prov, 'prov:activity') |
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activityRef.setAttribute('prov:ref', activityId) |
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wasGen.appendChild(activityRef) |
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doc.appendChild(wasGen) |
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if 'created' in item.provenance: |
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wasGenTime = dom.createElementNS(prov, 'prov:time') |
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wasGenTimeVal = dom.createTextNode(item.provenance['created'].isoformat()) |
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wasGenTime.appendChild(wasGenTimeVal) |
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wasGen.appendChild(wasGenTime) |
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doc.appendChild(entity) |
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return dom.toprettyxml(encoding="UTF-8") |
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ilogue /
niprov
