rdf/base/src/rdfTriplesSerializer.cpp@b8a032363ba2 (annotated)
rdf/base/src/rdfTriplesSerializer.cpp
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "nsIOutputStream.h" |
| michael@0 | 7 | #include "nsReadableUtils.h" |
| michael@0 | 8 | #include "nsCRT.h" |
| michael@0 | 9 | #include "nsCOMPtr.h" |
| michael@0 | 10 | #include "nsString.h" |
| michael@0 | 11 | #include "nsPrintfCString.h" |
| michael@0 | 12 | #include "nsIBufferedStreams.h" |
| michael@0 | 13 | #include "nsNetCID.h" |
| michael@0 | 14 | #include "nsComponentManagerUtils.h" |
| michael@0 | 15 | |
| michael@0 | 16 | #include "rdfISerializer.h" |
| michael@0 | 17 | #include "rdfIDataSource.h" |
| michael@0 | 18 | #include "rdfITripleVisitor.h" |
| michael@0 | 19 | |
| michael@0 | 20 | #include "nsIRDFResource.h" |
| michael@0 | 21 | #include "nsIRDFLiteral.h" |
| michael@0 | 22 | #include "mozilla/Attributes.h" |
| michael@0 | 23 | |
| michael@0 | 24 | class TriplesVisitor MOZ_FINAL : public rdfITripleVisitor |
| michael@0 | 25 | { |
| michael@0 | 26 | public: |
| michael@0 | 27 | TriplesVisitor(nsIOutputStream* aOut) : mOut(aOut) {} |
| michael@0 | 28 | NS_DECL_RDFITRIPLEVISITOR |
| michael@0 | 29 | NS_DECL_ISUPPORTS |
| michael@0 | 30 | protected: |
| michael@0 | 31 | nsresult writeResource(nsIRDFResource* aResource); |
| michael@0 | 32 | nsIOutputStream* mOut; |
| michael@0 | 33 | }; |
| michael@0 | 34 | |
| michael@0 | 35 | NS_IMPL_ISUPPORTS(TriplesVisitor, rdfITripleVisitor) |
| michael@0 | 36 | |
| michael@0 | 37 | nsresult |
| michael@0 | 38 | TriplesVisitor::writeResource(nsIRDFResource *aResource) |
| michael@0 | 39 | { |
| michael@0 | 40 | nsCString res; |
| michael@0 | 41 | uint32_t writeCount, wroteCount; |
| michael@0 | 42 | mOut->Write("<", 1, &wroteCount); |
| michael@0 | 43 | NS_ENSURE_TRUE(wroteCount == 1, NS_ERROR_FAILURE); |
| michael@0 | 44 | nsresult rv = aResource->GetValueUTF8(res); |
| michael@0 | 45 | NS_ENSURE_SUCCESS(rv, rv); |
| michael@0 | 46 | writeCount = res.Length(); |
| michael@0 | 47 | mOut->Write(res.get(), writeCount, &wroteCount); |
| michael@0 | 48 | NS_ENSURE_TRUE(writeCount == wroteCount, NS_ERROR_FAILURE); |
| michael@0 | 49 | mOut->Write("> ", 2, &wroteCount); |
| michael@0 | 50 | NS_ENSURE_TRUE(wroteCount == 2, NS_ERROR_FAILURE); |
| michael@0 | 51 | return NS_OK; |
| michael@0 | 52 | } |
| michael@0 | 53 | |
| michael@0 | 54 | NS_IMETHODIMP |
| michael@0 | 55 | TriplesVisitor::Visit(nsIRDFNode *aSubject, nsIRDFResource *aPredicate, |
| michael@0 | 56 | nsIRDFNode *aObject, bool aTruthValue) |
| michael@0 | 57 | { |
| michael@0 | 58 | nsCOMPtr<nsIRDFResource> subjectRes = do_QueryInterface(aSubject); |
| michael@0 | 59 | nsresult rv = NS_OK; |
| michael@0 | 60 | if (subjectRes) { |
| michael@0 | 61 | rv = writeResource(subjectRes); |
| michael@0 | 62 | } |
| michael@0 | 63 | if (NS_FAILED(rv)) { |
| michael@0 | 64 | return rv; |
| michael@0 | 65 | } |
| michael@0 | 66 | rv = writeResource(aPredicate); |
| michael@0 | 67 | if (NS_FAILED(rv)) { |
| michael@0 | 68 | return rv; |
| michael@0 | 69 | } |
| michael@0 | 70 | nsCOMPtr<nsIRDFResource> res = do_QueryInterface(aObject); |
| michael@0 | 71 | nsCOMPtr<nsIRDFLiteral> lit; |
| michael@0 | 72 | nsCOMPtr<nsIRDFInt> intLit; |
| michael@0 | 73 | uint32_t wroteCount; |
| michael@0 | 74 | if (res) { |
| michael@0 | 75 | rv = writeResource(res); |
| michael@0 | 76 | } else if ((lit = do_QueryInterface(aObject)) != nullptr) { |
| michael@0 | 77 | const char16_t *value; |
| michael@0 | 78 | lit->GetValueConst(&value); |
| michael@0 | 79 | nsAutoCString object; |
| michael@0 | 80 | object.AppendLiteral("\""); |
| michael@0 | 81 | AppendUTF16toUTF8(value, object); |
| michael@0 | 82 | object.AppendLiteral("\" "); |
| michael@0 | 83 | uint32_t writeCount = object.Length(); |
| michael@0 | 84 | rv = mOut->Write(object.get(), writeCount, &wroteCount); |
| michael@0 | 85 | NS_ENSURE_TRUE(writeCount == wroteCount, NS_ERROR_FAILURE); |
| michael@0 | 86 | } else if ((intLit = do_QueryInterface(aObject)) != nullptr) { |
| michael@0 | 87 | int32_t value; |
| michael@0 | 88 | intLit->GetValue(&value); |
| michael@0 | 89 | nsPrintfCString |
| michael@0 | 90 | object("\"%i\"^^<http://www.w3.org/2001/XMLSchema#integer> ", |
| michael@0 | 91 | value); |
| michael@0 | 92 | uint32_t writeCount = object.Length(); |
| michael@0 | 93 | rv = mOut->Write(object.get(), writeCount, &wroteCount); |
| michael@0 | 94 | NS_ENSURE_TRUE(writeCount == wroteCount, NS_ERROR_FAILURE); |
| michael@0 | 95 | } |
| michael@0 | 96 | NS_ENSURE_SUCCESS(rv, rv); |
| michael@0 | 97 | return mOut->Write(".\n", 2, &wroteCount); |
| michael@0 | 98 | } |
| michael@0 | 99 | |
| michael@0 | 100 | class rdfTriplesSerializer MOZ_FINAL : public rdfISerializer |
| michael@0 | 101 | { |
| michael@0 | 102 | public: |
| michael@0 | 103 | NS_DECL_ISUPPORTS |
| michael@0 | 104 | NS_DECL_RDFISERIALIZER |
| michael@0 | 105 | |
| michael@0 | 106 | rdfTriplesSerializer(); |
| michael@0 | 107 | |
| michael@0 | 108 | private: |
| michael@0 | 109 | ~rdfTriplesSerializer(); |
| michael@0 | 110 | |
| michael@0 | 111 | }; |
| michael@0 | 112 | |
| michael@0 | 113 | nsresult |
| michael@0 | 114 | NS_NewTriplesSerializer(rdfISerializer** aResult) |
| michael@0 | 115 | { |
| michael@0 | 116 | NS_PRECONDITION(aResult != nullptr, "null ptr"); |
| michael@0 | 117 | if (! aResult) |
| michael@0 | 118 | return NS_ERROR_NULL_POINTER; |
| michael@0 | 119 | |
| michael@0 | 120 | *aResult = new rdfTriplesSerializer(); |
| michael@0 | 121 | if (! *aResult) |
| michael@0 | 122 | return NS_ERROR_OUT_OF_MEMORY; |
| michael@0 | 123 | NS_ADDREF(*aResult); |
| michael@0 | 124 | return NS_OK; |
| michael@0 | 125 | } |
| michael@0 | 126 | |
| michael@0 | 127 | NS_IMPL_ISUPPORTS(rdfTriplesSerializer, rdfISerializer) |
| michael@0 | 128 | |
| michael@0 | 129 | rdfTriplesSerializer::rdfTriplesSerializer() |
| michael@0 | 130 | { |
| michael@0 | 131 | } |
| michael@0 | 132 | |
| michael@0 | 133 | rdfTriplesSerializer::~rdfTriplesSerializer() |
| michael@0 | 134 | { |
| michael@0 | 135 | } |
| michael@0 | 136 | |
| michael@0 | 137 | NS_IMETHODIMP |
| michael@0 | 138 | rdfTriplesSerializer::Serialize(rdfIDataSource *aDataSource, |
| michael@0 | 139 | nsIOutputStream *aOut) |
| michael@0 | 140 | { |
| michael@0 | 141 | nsresult rv; |
| michael@0 | 142 | nsCOMPtr<nsIBufferedOutputStream> bufout = |
| michael@0 | 143 | do_CreateInstance(NS_BUFFEREDOUTPUTSTREAM_CONTRACTID, &rv); |
| michael@0 | 144 | NS_ENSURE_SUCCESS(rv, rv); |
| michael@0 | 145 | rv = bufout->Init(aOut, 1024); |
| michael@0 | 146 | NS_ENSURE_SUCCESS(rv, rv); |
| michael@0 | 147 | nsCOMPtr<rdfITripleVisitor> tv = new TriplesVisitor(bufout); |
| michael@0 | 148 | NS_ENSURE_TRUE(tv, NS_ERROR_OUT_OF_MEMORY); |
| michael@0 | 149 | return aDataSource->VisitAllTriples(tv); |
| michael@0 | 150 | } |
