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authorUlas Kozat <ulas.kozat@gmail.com>2016-05-15 21:31:15 -0700
committerUlas Kozat <ulas.kozat@gmail.com>2016-05-15 21:43:21 -0700
commit7893dd02c15f2a727eb50887c9ddb829fc71f556 (patch)
tree54efcdadfda729ec4301537d264f6ea4298716e9 /lib/thrift/protocol/TJSONProtocol.py
parent06f85217ae3d5c9b429bad94827caed0641cd120 (diff)
Simple mapper/scheduler/partitioner functions implemented
Change-Id: I553b196943022451d8dc4984fe37b2b228c8f4cf Signed-off-by: Ulas C. Kozat <ulas.kozat@huawei.com>
Diffstat (limited to 'lib/thrift/protocol/TJSONProtocol.py')
-rw-r--r--lib/thrift/protocol/TJSONProtocol.py569
1 files changed, 569 insertions, 0 deletions
diff --git a/lib/thrift/protocol/TJSONProtocol.py b/lib/thrift/protocol/TJSONProtocol.py
new file mode 100644
index 0000000..9c1877b
--- /dev/null
+++ b/lib/thrift/protocol/TJSONProtocol.py
@@ -0,0 +1,569 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+from TProtocol import TType, TProtocolBase, TProtocolException, \
+ checkIntegerLimits
+import base64
+import json
+import math
+
+__all__ = ['TJSONProtocol',
+ 'TJSONProtocolFactory',
+ 'TSimpleJSONProtocol',
+ 'TSimpleJSONProtocolFactory']
+
+VERSION = 1
+
+COMMA = ','
+COLON = ':'
+LBRACE = '{'
+RBRACE = '}'
+LBRACKET = '['
+RBRACKET = ']'
+QUOTE = '"'
+BACKSLASH = '\\'
+ZERO = '0'
+
+ESCSEQ = '\\u00'
+ESCAPE_CHAR = '"\\bfnrt'
+ESCAPE_CHAR_VALS = ['"', '\\', '\b', '\f', '\n', '\r', '\t']
+NUMERIC_CHAR = '+-.0123456789Ee'
+
+CTYPES = {TType.BOOL: 'tf',
+ TType.BYTE: 'i8',
+ TType.I16: 'i16',
+ TType.I32: 'i32',
+ TType.I64: 'i64',
+ TType.DOUBLE: 'dbl',
+ TType.STRING: 'str',
+ TType.STRUCT: 'rec',
+ TType.LIST: 'lst',
+ TType.SET: 'set',
+ TType.MAP: 'map'}
+
+JTYPES = {}
+for key in CTYPES.keys():
+ JTYPES[CTYPES[key]] = key
+
+
+class JSONBaseContext(object):
+
+ def __init__(self, protocol):
+ self.protocol = protocol
+ self.first = True
+
+ def doIO(self, function):
+ pass
+
+ def write(self):
+ pass
+
+ def read(self):
+ pass
+
+ def escapeNum(self):
+ return False
+
+ def __str__(self):
+ return self.__class__.__name__
+
+
+class JSONListContext(JSONBaseContext):
+
+ def doIO(self, function):
+ if self.first is True:
+ self.first = False
+ else:
+ function(COMMA)
+
+ def write(self):
+ self.doIO(self.protocol.trans.write)
+
+ def read(self):
+ self.doIO(self.protocol.readJSONSyntaxChar)
+
+
+class JSONPairContext(JSONBaseContext):
+
+ def __init__(self, protocol):
+ super(JSONPairContext, self).__init__(protocol)
+ self.colon = True
+
+ def doIO(self, function):
+ if self.first:
+ self.first = False
+ self.colon = True
+ else:
+ function(COLON if self.colon else COMMA)
+ self.colon = not self.colon
+
+ def write(self):
+ self.doIO(self.protocol.trans.write)
+
+ def read(self):
+ self.doIO(self.protocol.readJSONSyntaxChar)
+
+ def escapeNum(self):
+ return self.colon
+
+ def __str__(self):
+ return '%s, colon=%s' % (self.__class__.__name__, self.colon)
+
+
+class LookaheadReader():
+ hasData = False
+ data = ''
+
+ def __init__(self, protocol):
+ self.protocol = protocol
+
+ def read(self):
+ if self.hasData is True:
+ self.hasData = False
+ else:
+ self.data = self.protocol.trans.read(1)
+ return self.data
+
+ def peek(self):
+ if self.hasData is False:
+ self.data = self.protocol.trans.read(1)
+ self.hasData = True
+ return self.data
+
+class TJSONProtocolBase(TProtocolBase):
+
+ def __init__(self, trans):
+ TProtocolBase.__init__(self, trans)
+ self.resetWriteContext()
+ self.resetReadContext()
+
+ def resetWriteContext(self):
+ self.context = JSONBaseContext(self)
+ self.contextStack = [self.context]
+
+ def resetReadContext(self):
+ self.resetWriteContext()
+ self.reader = LookaheadReader(self)
+
+ def pushContext(self, ctx):
+ self.contextStack.append(ctx)
+ self.context = ctx
+
+ def popContext(self):
+ self.contextStack.pop()
+ if self.contextStack:
+ self.context = self.contextStack[-1]
+ else:
+ self.context = JSONBaseContext(self)
+
+ def writeJSONString(self, string):
+ self.context.write()
+ self.trans.write(json.dumps(string))
+
+ def writeJSONNumber(self, number):
+ self.context.write()
+ jsNumber = str(number)
+ if self.context.escapeNum():
+ jsNumber = "%s%s%s" % (QUOTE, jsNumber, QUOTE)
+ self.trans.write(jsNumber)
+
+ def writeJSONBase64(self, binary):
+ self.context.write()
+ self.trans.write(QUOTE)
+ self.trans.write(base64.b64encode(binary))
+ self.trans.write(QUOTE)
+
+ def writeJSONObjectStart(self):
+ self.context.write()
+ self.trans.write(LBRACE)
+ self.pushContext(JSONPairContext(self))
+
+ def writeJSONObjectEnd(self):
+ self.popContext()
+ self.trans.write(RBRACE)
+
+ def writeJSONArrayStart(self):
+ self.context.write()
+ self.trans.write(LBRACKET)
+ self.pushContext(JSONListContext(self))
+
+ def writeJSONArrayEnd(self):
+ self.popContext()
+ self.trans.write(RBRACKET)
+
+ def readJSONSyntaxChar(self, character):
+ current = self.reader.read()
+ if character != current:
+ raise TProtocolException(TProtocolException.INVALID_DATA,
+ "Unexpected character: %s" % current)
+
+ def readJSONString(self, skipContext):
+ string = []
+ if skipContext is False:
+ self.context.read()
+ self.readJSONSyntaxChar(QUOTE)
+ while True:
+ character = self.reader.read()
+ if character == QUOTE:
+ break
+ if character == ESCSEQ[0]:
+ character = self.reader.read()
+ if character == ESCSEQ[1]:
+ self.readJSONSyntaxChar(ZERO)
+ self.readJSONSyntaxChar(ZERO)
+ character = json.JSONDecoder().decode('"\u00%s"' % self.trans.read(2))
+ else:
+ off = ESCAPE_CHAR.find(character)
+ if off == -1:
+ raise TProtocolException(TProtocolException.INVALID_DATA,
+ "Expected control char")
+ character = ESCAPE_CHAR_VALS[off]
+ string.append(character)
+ return ''.join(string)
+
+ def isJSONNumeric(self, character):
+ return (True if NUMERIC_CHAR.find(character) != - 1 else False)
+
+ def readJSONQuotes(self):
+ if (self.context.escapeNum()):
+ self.readJSONSyntaxChar(QUOTE)
+
+ def readJSONNumericChars(self):
+ numeric = []
+ while True:
+ character = self.reader.peek()
+ if self.isJSONNumeric(character) is False:
+ break
+ numeric.append(self.reader.read())
+ return ''.join(numeric)
+
+ def readJSONInteger(self):
+ self.context.read()
+ self.readJSONQuotes()
+ numeric = self.readJSONNumericChars()
+ self.readJSONQuotes()
+ try:
+ return int(numeric)
+ except ValueError:
+ raise TProtocolException(TProtocolException.INVALID_DATA,
+ "Bad data encounted in numeric data")
+
+ def readJSONDouble(self):
+ self.context.read()
+ if self.reader.peek() == QUOTE:
+ string = self.readJSONString(True)
+ try:
+ double = float(string)
+ if (self.context.escapeNum is False and
+ not math.isinf(double) and
+ not math.isnan(double)):
+ raise TProtocolException(TProtocolException.INVALID_DATA,
+ "Numeric data unexpectedly quoted")
+ return double
+ except ValueError:
+ raise TProtocolException(TProtocolException.INVALID_DATA,
+ "Bad data encounted in numeric data")
+ else:
+ if self.context.escapeNum() is True:
+ self.readJSONSyntaxChar(QUOTE)
+ try:
+ return float(self.readJSONNumericChars())
+ except ValueError:
+ raise TProtocolException(TProtocolException.INVALID_DATA,
+ "Bad data encounted in numeric data")
+
+ def readJSONBase64(self):
+ string = self.readJSONString(False)
+ return base64.b64decode(string)
+
+ def readJSONObjectStart(self):
+ self.context.read()
+ self.readJSONSyntaxChar(LBRACE)
+ self.pushContext(JSONPairContext(self))
+
+ def readJSONObjectEnd(self):
+ self.readJSONSyntaxChar(RBRACE)
+ self.popContext()
+
+ def readJSONArrayStart(self):
+ self.context.read()
+ self.readJSONSyntaxChar(LBRACKET)
+ self.pushContext(JSONListContext(self))
+
+ def readJSONArrayEnd(self):
+ self.readJSONSyntaxChar(RBRACKET)
+ self.popContext()
+
+
+class TJSONProtocol(TJSONProtocolBase):
+
+ def readMessageBegin(self):
+ self.resetReadContext()
+ self.readJSONArrayStart()
+ if self.readJSONInteger() != VERSION:
+ raise TProtocolException(TProtocolException.BAD_VERSION,
+ "Message contained bad version.")
+ name = self.readJSONString(False)
+ typen = self.readJSONInteger()
+ seqid = self.readJSONInteger()
+ return (name, typen, seqid)
+
+ def readMessageEnd(self):
+ self.readJSONArrayEnd()
+
+ def readStructBegin(self):
+ self.readJSONObjectStart()
+
+ def readStructEnd(self):
+ self.readJSONObjectEnd()
+
+ def readFieldBegin(self):
+ character = self.reader.peek()
+ ttype = 0
+ id = 0
+ if character == RBRACE:
+ ttype = TType.STOP
+ else:
+ id = self.readJSONInteger()
+ self.readJSONObjectStart()
+ ttype = JTYPES[self.readJSONString(False)]
+ return (None, ttype, id)
+
+ def readFieldEnd(self):
+ self.readJSONObjectEnd()
+
+ def readMapBegin(self):
+ self.readJSONArrayStart()
+ keyType = JTYPES[self.readJSONString(False)]
+ valueType = JTYPES[self.readJSONString(False)]
+ size = self.readJSONInteger()
+ self.readJSONObjectStart()
+ return (keyType, valueType, size)
+
+ def readMapEnd(self):
+ self.readJSONObjectEnd()
+ self.readJSONArrayEnd()
+
+ def readCollectionBegin(self):
+ self.readJSONArrayStart()
+ elemType = JTYPES[self.readJSONString(False)]
+ size = self.readJSONInteger()
+ return (elemType, size)
+ readListBegin = readCollectionBegin
+ readSetBegin = readCollectionBegin
+
+ def readCollectionEnd(self):
+ self.readJSONArrayEnd()
+ readSetEnd = readCollectionEnd
+ readListEnd = readCollectionEnd
+
+ def readBool(self):
+ return (False if self.readJSONInteger() == 0 else True)
+
+ def readNumber(self):
+ return self.readJSONInteger()
+ readByte = readNumber
+ readI16 = readNumber
+ readI32 = readNumber
+ readI64 = readNumber
+
+ def readDouble(self):
+ return self.readJSONDouble()
+
+ def readString(self):
+ return self.readJSONString(False)
+
+ def readBinary(self):
+ return self.readJSONBase64()
+
+ def writeMessageBegin(self, name, request_type, seqid):
+ self.resetWriteContext()
+ self.writeJSONArrayStart()
+ self.writeJSONNumber(VERSION)
+ self.writeJSONString(name)
+ self.writeJSONNumber(request_type)
+ self.writeJSONNumber(seqid)
+
+ def writeMessageEnd(self):
+ self.writeJSONArrayEnd()
+
+ def writeStructBegin(self, name):
+ self.writeJSONObjectStart()
+
+ def writeStructEnd(self):
+ self.writeJSONObjectEnd()
+
+ def writeFieldBegin(self, name, ttype, id):
+ self.writeJSONNumber(id)
+ self.writeJSONObjectStart()
+ self.writeJSONString(CTYPES[ttype])
+
+ def writeFieldEnd(self):
+ self.writeJSONObjectEnd()
+
+ def writeFieldStop(self):
+ pass
+
+ def writeMapBegin(self, ktype, vtype, size):
+ self.writeJSONArrayStart()
+ self.writeJSONString(CTYPES[ktype])
+ self.writeJSONString(CTYPES[vtype])
+ self.writeJSONNumber(size)
+ self.writeJSONObjectStart()
+
+ def writeMapEnd(self):
+ self.writeJSONObjectEnd()
+ self.writeJSONArrayEnd()
+
+ def writeListBegin(self, etype, size):
+ self.writeJSONArrayStart()
+ self.writeJSONString(CTYPES[etype])
+ self.writeJSONNumber(size)
+
+ def writeListEnd(self):
+ self.writeJSONArrayEnd()
+
+ def writeSetBegin(self, etype, size):
+ self.writeJSONArrayStart()
+ self.writeJSONString(CTYPES[etype])
+ self.writeJSONNumber(size)
+
+ def writeSetEnd(self):
+ self.writeJSONArrayEnd()
+
+ def writeBool(self, boolean):
+ self.writeJSONNumber(1 if boolean is True else 0)
+
+ def writeByte(self, byte):
+ checkIntegerLimits(byte, 8)
+ self.writeJSONNumber(byte)
+
+ def writeI16(self, i16):
+ checkIntegerLimits(i16, 16)
+ self.writeJSONNumber(i16)
+
+ def writeI32(self, i32):
+ checkIntegerLimits(i32, 32)
+ self.writeJSONNumber(i32)
+
+ def writeI64(self, i64):
+ checkIntegerLimits(i64, 64)
+ self.writeJSONNumber(i64)
+
+ def writeDouble(self, dbl):
+ self.writeJSONNumber(dbl)
+
+ def writeString(self, string):
+ self.writeJSONString(string)
+
+ def writeBinary(self, binary):
+ self.writeJSONBase64(binary)
+
+
+class TJSONProtocolFactory:
+
+ def getProtocol(self, trans):
+ return TJSONProtocol(trans)
+
+
+class TSimpleJSONProtocol(TJSONProtocolBase):
+ """Simple, readable, write-only JSON protocol.
+
+ Useful for interacting with scripting languages.
+ """
+
+ def readMessageBegin(self):
+ raise NotImplementedError()
+
+ def readMessageEnd(self):
+ raise NotImplementedError()
+
+ def readStructBegin(self):
+ raise NotImplementedError()
+
+ def readStructEnd(self):
+ raise NotImplementedError()
+
+ def writeMessageBegin(self, name, request_type, seqid):
+ self.resetWriteContext()
+
+ def writeMessageEnd(self):
+ pass
+
+ def writeStructBegin(self, name):
+ self.writeJSONObjectStart()
+
+ def writeStructEnd(self):
+ self.writeJSONObjectEnd()
+
+ def writeFieldBegin(self, name, ttype, fid):
+ self.writeJSONString(name)
+
+ def writeFieldEnd(self):
+ pass
+
+ def writeMapBegin(self, ktype, vtype, size):
+ self.writeJSONObjectStart()
+
+ def writeMapEnd(self):
+ self.writeJSONObjectEnd()
+
+ def _writeCollectionBegin(self, etype, size):
+ self.writeJSONArrayStart()
+
+ def _writeCollectionEnd(self):
+ self.writeJSONArrayEnd()
+ writeListBegin = _writeCollectionBegin
+ writeListEnd = _writeCollectionEnd
+ writeSetBegin = _writeCollectionBegin
+ writeSetEnd = _writeCollectionEnd
+
+ def writeByte(self, byte):
+ checkIntegerLimits(byte, 8)
+ self.writeJSONNumber(byte)
+
+ def writeI16(self, i16):
+ checkIntegerLimits(i16, 16)
+ self.writeJSONNumber(i16)
+
+ def writeI32(self, i32):
+ checkIntegerLimits(i32, 32)
+ self.writeJSONNumber(i32)
+
+ def writeI64(self, i64):
+ checkIntegerLimits(i64, 64)
+ self.writeJSONNumber(i64)
+
+ def writeBool(self, boolean):
+ self.writeJSONNumber(1 if boolean is True else 0)
+
+ def writeDouble(self, dbl):
+ self.writeJSONNumber(dbl)
+
+ def writeString(self, string):
+ self.writeJSONString(string)
+
+ def writeBinary(self, binary):
+ self.writeJSONBase64(binary)
+
+
+class TSimpleJSONProtocolFactory(object):
+
+ def getProtocol(self, trans):
+ return TSimpleJSONProtocol(trans)