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| author | Eliot Horowitz <eliot@10gen.com> | 2011-12-24 15:33:26 -0500 |
|---|---|---|
| committer | Eliot Horowitz <eliot@10gen.com> | 2011-12-24 15:33:45 -0500 |
| commit | ae1ecd9c786911f9f1f0242f0f7d702b3e5dfeba (patch) | |
| tree | 92f8e1649e6f080b251ff5f1763679a72eb59b34 /src/mongo/db/pipeline/field_path.cpp | |
| parent | dfa4cd7e2cf109b072440155fabc08a93c8045a0 (diff) | |
| download | mongo-ae1ecd9c786911f9f1f0242f0f7d702b3e5dfeba.tar.gz | |
bulk move of code to src/ SERVER-4551
Diffstat (limited to 'src/mongo/db/pipeline/field_path.cpp')
| -rwxr-xr-x | src/mongo/db/pipeline/field_path.cpp | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/field_path.cpp b/src/mongo/db/pipeline/field_path.cpp new file mode 100755 index 00000000000..96e1fc92f83 --- /dev/null +++ b/src/mongo/db/pipeline/field_path.cpp @@ -0,0 +1,87 @@ +/**
+ * Copyright (c) 2011 10gen Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "pch.h"
+#include "db/pipeline/field_path.h"
+#include "util/mongoutils/str.h"
+
+namespace mongo {
+ using namespace mongoutils;
+
+ FieldPath::~FieldPath() {
+ }
+
+ FieldPath::FieldPath():
+ vFieldName() {
+ }
+
+ FieldPath::FieldPath(const string &fieldPath):
+ vFieldName() {
+ /*
+ The field path could be using dot notation.
+ Break the field path up by peeling off successive pieces.
+ */
+ size_t startpos = 0;
+ while(true) {
+ /* find the next dot */
+ const size_t dotpos = fieldPath.find('.', startpos);
+
+ /* if there are no more dots, use the remainder of the string */
+ if (dotpos == fieldPath.npos) {
+ vFieldName.push_back(fieldPath.substr(startpos, dotpos));
+ break;
+ }
+
+ /* use the string up to the dot */
+ const size_t length = dotpos - startpos;
+ uassert(15998, str::stream() <<
+ "field names cannot be zero length (in path \"" <<
+ fieldPath << "\")",
+ length > 0);
+
+ vFieldName.push_back(fieldPath.substr(startpos, length));
+
+ /* next time, search starting one spot after that */
+ startpos = dotpos + 1;
+ }
+ }
+
+ string FieldPath::getPath(bool fieldPrefix) const {
+ stringstream ss;
+ writePath(ss, fieldPrefix);
+ return ss.str();
+ }
+
+ void FieldPath::writePath(ostream &outStream, bool fieldPrefix) const {
+ if (fieldPrefix)
+ outStream << "$";
+
+ outStream << vFieldName[0];
+
+ const size_t n = vFieldName.size();
+ for(size_t i = 1; i < n; ++i)
+ outStream << "." << vFieldName[i];
+ }
+
+ FieldPath &FieldPath::operator=(const FieldPath &rRHS) {
+ if (this != &rRHS) {
+ vFieldName = rRHS.vFieldName;
+ }
+
+ return *this;
+ }
+
+}
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