oracle.pg.common

Class OraclePropertyGraphUtilsBase

java.lang.Object

oracle.pg.common.OraclePropertyGraphUtilsBase

All Implemented Interfaces:

MesgConsts

Direct Known Subclasses:

OraclePropertyGraphUtils

public abstract class OraclePropertyGraphUtilsBase
extends Object
implements MesgConsts

This class contains utility functions to help manage property graphs.

Field Summary

Fields inherited from interface oracle.pg.common.MesgConsts

ERR_ARG_CANNOT_BE_NULL, ERR_CODE_NOT_IN_LIST, ERR_DOP_CONSTRAINT, ERR_E_DS_MUSTBE_FILE_OR_IS, ERR_E_MAX_LINE_CONSTRAINT, ERR_EDGE_DIR_NOT_BOTH, ERR_GRAPH_NAME_CANT_BENULL, ERR_HIT_EXCEPTION, ERR_HIT_INTERRUPT, ERR_HIT_IO, ERR_HIT_OPGE, ERR_HIT_PARSEE, ERR_ID_CANNOT_BE_NULL, ERR_IDX_KEY_CANNOT_BE_NULL, ERR_IN_DS_EDGE_CANTBE_NULL, ERR_IN_DS_VERT_CANTBE_NULL, ERR_IN_E_FLAT_DOESNT_EXIST, ERR_IN_V_FLAT_DOESNT_EXIST, ERR_INVALID_NUM_FIELDS, ERR_INVALID_NUM_NOARG, ERR_INVALID_NUMBER, ERR_INVALID_VAL, ERR_KEY_CANNOT_BE_ID, ERR_KEY_CANNOT_BE_NULL, ERR_KEY_NOT_SET_TO, ERR_NO_ELEM_TO_BE_CONSUMED, ERR_NO_OP_SUPPORTED, ERR_NOT_IMPLEMENTED_YET, ERR_NOT_ORACLE_V_E, ERR_NUM_PART_CONSTRAINT, ERR_OFFSET_CONSTRAINT, ERR_OFFSET_E_MUST_BE_POS, ERR_OFFSET_V_MUST_BE_POS, ERR_PG_ALREADY_EXISTS, ERR_PG_NOT_EMPTY, ERR_SIZE_MUST_BE_POS, ERR_TIMEOUT_TAB_CREATION, ERR_TYPE_ID_NOT_RECO, ERR_UNSUPPORTED_VAL_TYP, ERR_USER_REQ_OP_CANCEL, ERR_V_DS_MUSTBE_FILE_OR_IS, ERR_V_MAX_LINE_CONSTRAINT, ERR_VALUE_CANNOT_BE_NULL, INFO_EMP_K_NO_P_VAL, INFO_NUL_K_NO_P_VAL

Constructor Summary

Constructors

Constructor and Description
OraclePropertyGraphUtilsBase()

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	compareFiles(String szSrcFile, String szDstFile) Compare the content of two files contents against each other
static void	convertCSV2OPE(InputStream inCSV, String eidColName, long lOffsetEID, String svidColName, String dvidColName, boolean hasEdgeLabelCol, String elColName, ColumnToAttrMapping[] ctams, int dop, char delimiterChar, char quotationChar, long lOffsetLines, OutputStream opeOS, DataConverterListener dcl) Converts a property graph file for edges in CSV format into Oracle Flat File format.
static void	convertCSV2OPE(InputStream inCSV, String eidColName, long lOffsetEID, String svidColName, String dvidColName, boolean hasEdgeLabelCol, String elColName, ColumnToAttrMapping[] ctams, int dop, long lOffsetLines, OutputStream opeOS, DataConverterListener dcl) Converts a property graph file for edges in CSV format into Oracle Flat File format.
static void	convertCSV2OPV(InputStream inCSV, String vidColName, long lOffsetVID, ColumnToAttrMapping[] ctams, int dop, char delimiterChar, char quotationChar, long lOffsetLines, OutputStream opvOS, DataConverterListener dcl) Converts a property graph file for vertices in CSV format into Oracle Flat File format using the specified delimiters.
static void	convertCSV2OPV(InputStream inCSV, String vidColName, long lOffsetVID, ColumnToAttrMapping[] ctams, int dop, long lOffsetLines, OutputStream opvOS, DataConverterListener dcl) Converts a property graph file for vertices in CSV format into Oracle Flat File format using the specified delimiters.
static void	convertRDBMSTable2OPE(Connection conn, String rdbmsTableName, String eidColName, long lEIDOffset, String svidColName, String dvidColName, long lVIDOffset, boolean bHasEdgeLabelCol, String elColName, ColumnToAttrMapping[] ctams, int dop, OutputStream opeOS, DataConverterListener dcl) This method converts given rdbms table to a ope file
static void	convertRDBMSTable2OPV(Connection conn, String rdbmsTableName, String vidColName, long lVIDOffset, ColumnToAttrMapping[] ctams, int dop, OutputStream opvOS, DataConverterListener dcl) This method converts given rdbms table to a opv file
static byte[]	escape(String s) This method escapes a string in the following manner: In one scan from left to right, a % is replaced with %25, a tab \t is replaced with %09, a newline \n is replaced with %0A, and a comma is replaced with %2c.
static void	exportFlatFiles(OraclePropertyGraphBase pg, OutputStream osVertex, OutputStream osEdge, int dop, boolean append) This function exports a given property graph into two flat files: one for vertices and the other for edges.
static void	exportFlatFiles(OraclePropertyGraphBase pg, String vertexFileName, String edgeFileName, boolean append) This function exports a given property graph into two flat files: one for vertices and the other for edges.
static void	exportFlatFiles(OraclePropertyGraphBase pg, String vertexFileName, String edgeFileName, int dop, boolean append) This function exports a given property graph into two flat files: one for vertices and the other for edges.
static void	exportGML(OraclePropertyGraphBase opg, OutputStream os, PrintStream psOut) Exports all vertices/edges from the specified property graph into the output stream in GML format.
static void	exportGML(OraclePropertyGraphBase opg, String gmlFileName, PrintStream psOut) Exports all vertices/edges from the specified property graph into the specified file in GML format.
static void	exportGraphML(OraclePropertyGraphBase opg, OutputStream os, PrintStream psOut) Exports all vertices/edges from the specified property graph into the output stream in GraphGML format.
static void	exportGraphML(OraclePropertyGraphBase opg, String graphMLFileName, PrintStream psOut) Exports all vertices/edges from the specified property graph into the specified file in GraphGML format.
static void	exportGraphSON(OraclePropertyGraphBase opg, OutputStream os, PrintStream psOut) Exports all vertices/edges from the specified property graph into the output stream in GraphSON format.
static void	exportGraphSON(OraclePropertyGraphBase opg, String graphSonFileName, PrintStream psOut) Exports all vertices/edges from the specified property graph into the specified file in GraphSON format.
static InputStream	handleGZipInputStream(InputStream in) Handle a GZIPInputStream
static void	importGML(OraclePropertyGraphBase opg, InputStream is, PrintStream psOut) Imports all vertices/edges from the input stream in GML format into the specified property graph.
static void	importGML(OraclePropertyGraphBase opg, String gmlFileName, PrintStream psOut) Imports all vertices/edges from the specified file in GML format into the specified property graph.
static void	importGraphML(OraclePropertyGraphBase opg, InputStream is, PrintStream psOut) Imports all vertices/edges from the input stream in GraphGML format into the specified property graph.
static void	importGraphML(OraclePropertyGraphBase opg, String graphMLFileName, PrintStream psOut) Imports all vertices/edges from the specified file in GraphGML format into the specified property graph.
static void	importGraphSON(OraclePropertyGraphBase opg, InputStream is, PrintStream psOut) Imports all vertices/edges from the input stream in GraphSON format into the specified property graph.
static void	importGraphSON(OraclePropertyGraphBase opg, String graphSonFileName, PrintStream psOut) Imports all vertices/edges from the specified file in GraphSON format into the specified property graph.
static <E> List<E>	listify(Iterable<E> it) This method converts a given Iterable instance to a List object.
static void	quietlyClose(BufferedReader br) Quietly closes the specified BufferedReader.
static void	quietlyClose(InputStream is) Quietly closes the specified InputStream.
static void	quietlyClose(OutputStream os) Quietly closes the specified OutputStream.
static void	quietlyCloseResultSet(ResultSet rs) This method will close (in a best effort fashion) the provided result set.
static void	quietlyCloseResultSetAndStmt(ResultSet rs) This method will close (in a best effort fashion) the provided result set and its corresponding statement.
static void	quietlyCloseResultSetAndStmt(ResultSet rs, Statement stmt) This method will close (in a best effort fashion) the provided result set and its corresponding statement.
static void	quietlyCloseStmt(Statement stmt)
static void	quietlyShutdown(OraclePropertyGraphBase opg) Quietly shutdown a property graph.
static <E> long	size(Iterable<E> it) This method returns the number of elements in the given Iterable object.
static String	unescape(String s) This method unescapes a string in the following manner: In one scan from left to right, a %2C is replaced with a comma ',', a %09 is replaced with a tab \t, a %0A is replaced with a newline \n, and %25 is replaced with a percentage %.
static void	writeValue(OutputStream os, Object value, byte[] baFieldDelimiter, SimpleDateFormat sdf) This helper function serializes an object into the given output stream.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OraclePropertyGraphUtilsBase

public OraclePropertyGraphUtilsBase()

Method Detail

compareFiles

public static final boolean compareFiles(String szSrcFile,
                   String szDstFile)
                                  throws IOException

Compare the content of two files contents against each other

Parameters:

szSrcFile - the name of the first file to compare

szDstFile - the name of the second file to compare

Returns:

true if the files' contents is the same, else return false.

Throws:

IOException

convertCSV2OPE

public static void convertCSV2OPE(InputStream inCSV,
                  String eidColName,
                  long lOffsetEID,
                  String svidColName,
                  String dvidColName,
                  boolean hasEdgeLabelCol,
                  String elColName,
                  ColumnToAttrMapping[] ctams,
                  int dop,
                  char delimiterChar,
                  char quotationChar,
                  long lOffsetLines,
                  OutputStream opeOS,
                  DataConverterListener dcl)

Converts a property graph file for edges in CSV format into Oracle Flat File format. The files in this converter must not include a header if the ColumnToAttrMapping array is supplied with all the details of the column names and their type. If the ColumnToAttrMapping array supplied is null then the files must include a header in the first line.

Parameters:

inCSV - an InputStream object for the CSV file

eidColName - the column name that will be used as EID. If NULL, then the EID will be generated based on the line number. If the given column name does not have a numeric value, the value will be hashed into a long number for the ID.

lOffsetEID - the offset to the EID. Each EID will have a value of (lOffsetEID + EID).

svidColName - the column name that will be used as SVID. If the given column name does not have a numeric value, the value will be hashed into a long number for the ID.

dvidColName - the column name that will be used as DVID. If the given column name does not have a numeric value, the value will be hashed into a long number for the ID.

hasEdgeLabelCol - if true, read from elColName and treat the values as edge labels. If false, use elColName as a constant for all edge labels

elColName - the column name that will be used as edge label

ctams - an array of ColumnToAttrMapping objects. Each ColumnToAttrMapping object defines a mapping from a column in CSV file to an attribute of certain type in an OPE file. These mappings must be in the same order as the values are presented in the CSV file. E.g. If a CSV file includes a header for name,age,weight; the ctams array must include these mappings in the same order.

dop - degree of parallelism used to optimize converting performance.

delimiterChar - the character used to delimit values in a CSV file, e.g. ','

quotationChar - the character used to delimit how to treat quotation characters for values, e.g. '"'

lOffsetLines - in order to skip the first lines of the input file

opeOS - the OutputStream object where the OPE file will be written

dcl - an instance of DataConverterListener that can be used to report progress and control the conversion process when an error occurs.

convertCSV2OPE

public static void convertCSV2OPE(InputStream inCSV,
                  String eidColName,
                  long lOffsetEID,
                  String svidColName,
                  String dvidColName,
                  boolean hasEdgeLabelCol,
                  String elColName,
                  ColumnToAttrMapping[] ctams,
                  int dop,
                  long lOffsetLines,
                  OutputStream opeOS,
                  DataConverterListener dcl)

Converts a property graph file for edges in CSV format into Oracle Flat File format. The files in this converter must not include a header if the ColumnToAttrMapping array is supplied with all the details of the column names and their type. If the ColumnToAttrMapping array supplied is null then the files must include a header in the first line.

Parameters:

inCSV - an InputStream object for the CSV file

eidColName - the column name that will be used as EID. If NULL, then the EID will be generated based on the line number. If the given column name does not have a numeric value, the value will be hashed into a long number for the ID.

lOffsetEID - the offset to the EID. Each EID will have a value of (lOffsetEID + EID).

svidColName - the column name that will be used as SVID. If the given column name does not have a numeric value, the value will be hashed into a long number for the ID.

dvidColName - the column name that will be used as DVID. If the given column name does not have a numeric value, the value will be hashed into a long number for the ID.

hasEdgeLabelCol - if true, read from elColName and treat the values as edge labels. If false, use elColName as a constant for all edge labels

elColName - the column name that will be used as edge label

ctams - an array of ColumnToAttrMapping objects. Each ColumnToAttrMapping object defines a mapping from a column in CSV file to an attribute of certain type in an OPE file. These mappings must be in the same order as the values are presented in the CSV file. E.g. If a CSV file includes a header for name,age,weight; the ctams array must include these mappings in the same order.

dop - degree of parallelism used to optimize converting performance.

lOffsetLines - in order to skip the first lines of the input file

opeOS - the OutputStream object where the OPE file will be written

dcl - an instance of DataConverterListener that can be used to report progress and control the conversion process when an error occurs.

convertCSV2OPV

public static void convertCSV2OPV(InputStream inCSV,
                  String vidColName,
                  long lOffsetVID,
                  ColumnToAttrMapping[] ctams,
                  int dop,
                  char delimiterChar,
                  char quotationChar,
                  long lOffsetLines,
                  OutputStream opvOS,
                  DataConverterListener dcl)

Converts a property graph file for vertices in CSV format into Oracle Flat File format using the specified delimiters. The files in this converter must not include a header if the ColumnToAttrMapping array is supplied with all the details of the column names and their type. If the ColumnToAttrMapping array supplied is null then the files must include a header in the first line.

Parameters:

inCSV - an InputStream object for the CSV file

vidColName - the column name that will be used as VID. If NULL, then the VID will be generated based on the line number. If the given column name does not have a numeric value, the value will be hashed into a long number for the ID.

lOffsetVID - the offset to the VID. Each VID will have a value of (lOffsetVID + VID).

ctams - an array of ColumnToAttrMapping objects. Each ColumnToAttrMapping object defines a mapping from a column in CSV file to an attribute of certain type in an OPV file. These mappings must be in the same order as the values are presented in the CSV file. E.g. If a CSV file includes a header for name,age,weight; the ctams array must include these mappings in the same order.

dop - degree of parallelism used to optimize converting performance.

delimiterChar - the character used to delimit values in a CSV file, e.g. ','

quotationChar - the character used to delimit how to treat quotation characters for values, e.g. '"'

lOffsetLines - in order to skip the first lines of the input file

opvOS - the OutputStream object where the OPV file will be written

dcl - an instance of DataConverterListener that can be used to report progress and control the conversion process when an error occurs.

convertCSV2OPV

public static void convertCSV2OPV(InputStream inCSV,
                  String vidColName,
                  long lOffsetVID,
                  ColumnToAttrMapping[] ctams,
                  int dop,
                  long lOffsetLines,
                  OutputStream opvOS,
                  DataConverterListener dcl)

Converts a property graph file for vertices in CSV format into Oracle Flat File format using the specified delimiters. The files in this converter must not include a header if the ColumnToAttrMapping array is supplied with all the details of the column names and their type. If the ColumnToAttrMapping array supplied is null then the files must include a header in the first line.

Parameters:

inCSV - an InputStream object for the CSV file

vidColName - the column name that will be used as VID. If NULL, then the VID will be generated based on the line number. If the given column name does not have a numeric value, the value will be hashed into a long number for the ID.

lOffsetVID - the offset to the VID. Each VID will have a value of (lOffsetVID + VID).

ctams - an array of ColumnToAttrMapping objects. Each ColumnToAttrMapping object defines a mapping from a column in CSV file to an attribute of certain type in an OPV file. These mappings must be in the same order as the values are presented in the CSV file. E.g. If a CSV file includes a header for name,age,weight; the ctams array must include these mappings in the same order.

dop - degree of parallelism used to optimize converting performance.

lOffsetLines - in order to skip the first lines of the input file

opvOS - the OutputStream object where the OPV file will be written

dcl - an instance of DataConverterListener that can be used to report progress and control the conversion process when an error occurs.

convertRDBMSTable2OPE

public static void convertRDBMSTable2OPE(Connection conn,
                         String rdbmsTableName,
                         String eidColName,
                         long lEIDOffset,
                         String svidColName,
                         String dvidColName,
                         long lVIDOffset,
                         boolean bHasEdgeLabelCol,
                         String elColName,
                         ColumnToAttrMapping[] ctams,
                         int dop,
                         OutputStream opeOS,
                         DataConverterListener dcl)

This method converts given rdbms table to a ope file

Parameters:

conn - an connection instance to Oracle relational database

rdbmsTableName - the name of RDBMS table to be converted

eidColName - the column in given RDBMS table to be treated as eid, can be NULL when eidColName is not null and of type integer/long: use (column value + lEIDOffset) as eid when eidColName is not null and not of type integer/long: use (hash(column value) + lEIDOffset) as eid when eidColName is null: use (rownum + lEIDOffset) as eid

lEIDOffset - the offset to the eid

svidColName - the column in given RDBMS table to be treated as svid, can not be NULL when svidColName is of type integer/long: use (column value + lVIDOffset) as svid when svidColName is not of type integer/long: use (hash(column value) + lVIDOffset) as svid

dvidColName - the column in given RDBMS table to be treated as dvid, can not be NULL when eidColName is of type integer/long: use (column value + lVIDOffset) as dvid when eidColName is not of type integer/long: use (hash(column value) + lVIDOffset) as dvid

lVIDOffset - the offset to svid and dvid

bHasEdgeLabelCol - a boolean flag represents if the given rdbms table has a column for edge labels if true, use (value of column elColName) as edge label if false, use elColName as a constant for all edge labels

elColName -

ctams - an array of ColumnToAttrMapping objects; each ColumnToAttrMapping object defines a mapping from a column in rdbms table to an attribute of certain type in ope

dop - degree of parallelism

opeOS - ope output stream to be written to

dcl - an instance of DataConverterListener that can be used to report progress and control the conversion process when an error occurrs.

convertRDBMSTable2OPV

public static void convertRDBMSTable2OPV(Connection conn,
                         String rdbmsTableName,
                         String vidColName,
                         long lVIDOffset,
                         ColumnToAttrMapping[] ctams,
                         int dop,
                         OutputStream opvOS,
                         DataConverterListener dcl)

This method converts given rdbms table to a opv file

Parameters:

conn - an connection instance to Oracle relational database

rdbmsTableName - the name of RDBMS table to be converted

vidColName - the column in given RDBMS table to be treated as vid when vidColName is not null and of type integer/long: use (column value + lVIDOffset) as vid when vidColName is not null and not of type integer/long: use (hash(column value) + lVIDOffset) as vid when vidColName is null: use (rownum + lVIDOffset) as vid

lVIDOffset - the offset to the vid

ctams - an array of ColumnToAttrMapping objects; each ColumnToAttrMapping object defines a mapping from a column in rdbms table to an attribute of certain type in opv

dop - degree of parallelism

opvOS - opv output stream to be written to

dcl - an instance of DataConverterListener that can be used to report progress and control the conversion process when an error occurrs.

escape

public static final byte[] escape(String s)

This method escapes a string in the following manner: In one scan from left to right, a % is replaced with %25, a tab \t is replaced with %09, a newline \n is replaced with %0A, and a comma is replaced with %2c.

Parameters:

s - the string to be escaped

Returns:

a byte array representation of the escaped string.

exportFlatFiles

public static void exportFlatFiles(OraclePropertyGraphBase pg,
                   OutputStream osVertex,
                   OutputStream osEdge,
                   int dop,
                   boolean append)
                            throws IOException,
                                   FileNotFoundException

This function exports a given property graph into two flat files: one for vertices and the other for edges.

Parameters:

pg - the property graph that will be exported into flat files

osVertex - an OutputStream object for the vertex flat file

osEdge - an OutputStream object for the edge flat file

dop - the degree of parallelism used when writing the data into the flat files. This will use multiple threads to optimize writing performance.

append - if false, overwrite the existing flat files removing all existing data.

Throws:

IOException

FileNotFoundException

exportFlatFiles

public static final void exportFlatFiles(OraclePropertyGraphBase pg,
                   String vertexFileName,
                   String edgeFileName,
                   boolean append)
                                  throws IOException,
                                         FileNotFoundException

This function exports a given property graph into two flat files: one for vertices and the other for edges.

Parameters:

pg - the property graph that will be exported into flat files

vertexFileName - the name of the vertex flat file e.g. graph.opv

edgeFileName - the name of the edge flat file e.g. graph.ope

append - if false, overwrite the existing flat files removing all existing data.

Throws:

IOException

FileNotFoundException

exportFlatFiles

public static final void exportFlatFiles(OraclePropertyGraphBase pg,
                   String vertexFileName,
                   String edgeFileName,
                   int dop,
                   boolean append)
                                  throws IOException,
                                         FileNotFoundException

This function exports a given property graph into two flat files: one for vertices and the other for edges.

Parameters:

pg - the property graph that will be exported into flat files

vertexFileName - the name of the vertex flat file e.g. graph.opv

edgeFileName - the name of the edge flat file e.g. graph.ope

dop - the degree of parallelism used when writing the data into the flat files. This will use multiple threads to optimize writing performance.

append - if false, overwrite the existing flat files removing all existing data.

Throws:

IOException

FileNotFoundException

exportGML

public static final void exportGML(OraclePropertyGraphBase opg,
             OutputStream os,
             PrintStream psOut)
                            throws IOException

Exports all vertices/edges from the specified property graph into the output stream in GML format.

Parameters:

opg - the property graph to be exported.

os - the OutputStream where the property graph data will be exported

psOut -

Throws:

IOException

exportGML

public static final void exportGML(OraclePropertyGraphBase opg,
             String gmlFileName,
             PrintStream psOut)
                            throws IOException

Exports all vertices/edges from the specified property graph into the specified file in GML format.

Parameters:

opg - the property graph to be exported.

gmlFileName - the name of the file where the data should be written

psOut -

Throws:

IOException

exportGraphML

public static final void exportGraphML(OraclePropertyGraphBase opg,
                 OutputStream os,
                 PrintStream psOut)
                                throws IOException

Exports all vertices/edges from the specified property graph into the output stream in GraphGML format.

Parameters:

opg - the property graph to be exported.

os - the OutputStream where the property graph data will be exported

psOut -

Throws:

IOException

exportGraphML

public static final void exportGraphML(OraclePropertyGraphBase opg,
                 String graphMLFileName,
                 PrintStream psOut)
                                throws IOException

Exports all vertices/edges from the specified property graph into the specified file in GraphGML format.

Parameters:

opg - the property graph to be exported.

graphMLFileName - the name of the file where the data should be written

Throws:

IOException

exportGraphSON

public static final void exportGraphSON(OraclePropertyGraphBase opg,
                  OutputStream os,
                  PrintStream psOut)
                                 throws IOException

Exports all vertices/edges from the specified property graph into the output stream in GraphSON format.

Parameters:

opg - the property graph to be exported.

os - the OutputStream where the property graph data will be exported

Throws:

IOException

exportGraphSON

public static final void exportGraphSON(OraclePropertyGraphBase opg,
                  String graphSonFileName,
                  PrintStream psOut)
                                 throws IOException

Exports all vertices/edges from the specified property graph into the specified file in GraphSON format.

Parameters:

opg - the property graph to be exported.

graphSonFileName - the name of the file where the data should be written

Throws:

IOException

handleGZipInputStream

public static final InputStream handleGZipInputStream(InputStream in)
                                               throws IOException

Handle a GZIPInputStream

Throws:

IOException

importGML

public static final void importGML(OraclePropertyGraphBase opg,
             InputStream is,
             PrintStream psOut)
                            throws IOException

Imports all vertices/edges from the input stream in GML format into the specified property graph.

Parameters:

opg - the property graph to be exported.

is - the InputStream where the property graph data will be imported

Throws:

IOException

importGML

public static final void importGML(OraclePropertyGraphBase opg,
             String gmlFileName,
             PrintStream psOut)
                            throws IOException

Imports all vertices/edges from the specified file in GML format into the specified property graph.

Parameters:

opg - the property graph to be exported.

gmlFileName - the file name where the property graph data will be imported

Throws:

IOException

importGraphML

public static final void importGraphML(OraclePropertyGraphBase opg,
                 InputStream is,
                 PrintStream psOut)
                                throws IOException

Imports all vertices/edges from the input stream in GraphGML format into the specified property graph.

Parameters:

opg - the property graph to be exported.

is - the InputStream where the property graph data will be imported

Throws:

IOException

importGraphML

public static final void importGraphML(OraclePropertyGraphBase opg,
                 String graphMLFileName,
                 PrintStream psOut)
                                throws IOException

Imports all vertices/edges from the specified file in GraphGML format into the specified property graph.

Parameters:

opg - the property graph to be exported.

graphMLFileName - the file name where the property graph data will be imported

Throws:

IOException

importGraphSON

public static final void importGraphSON(OraclePropertyGraphBase opg,
                  InputStream is,
                  PrintStream psOut)
                                 throws IOException

Imports all vertices/edges from the input stream in GraphSON format into the specified property graph.

Parameters:

opg - the property graph to be exported.

is - the InputStream where the property graph data will be imported

Throws:

IOException

importGraphSON

public static final void importGraphSON(OraclePropertyGraphBase opg,
                  String graphSonFileName,
                  PrintStream psOut)
                                 throws IOException

Imports all vertices/edges from the specified file in GraphSON format into the specified property graph.

Parameters:

opg - the property graph to be exported.

graphSonFileName - the file name where the property graph data will be imported

Throws:

IOException

listify

public static final <E> List<E> listify(Iterable<E> it)

This method converts a given Iterable instance to a List object.

Parameters:

it - an Iterable instance. It can be NULL.

quietlyClose

public static void quietlyClose(BufferedReader br)

Quietly closes the specified BufferedReader.

Parameters:

br - the BufferedReader to close.

quietlyClose

public static final void quietlyClose(InputStream is)

Quietly closes the specified InputStream.

Parameters:

is - the InputStream to close.

quietlyClose

public static final void quietlyClose(OutputStream os)

Quietly closes the specified OutputStream.

Parameters:

os - the OutputStream to close.

quietlyCloseResultSet

public static void quietlyCloseResultSet(ResultSet rs)

This method will close (in a best effort fashion) the provided result set. Note that its corresponding statement will not be closed.

quietlyCloseResultSetAndStmt

public static void quietlyCloseResultSetAndStmt(ResultSet rs)

This method will close (in a best effort fashion) the provided result set and its corresponding statement.

quietlyCloseResultSetAndStmt

public static void quietlyCloseResultSetAndStmt(ResultSet rs,
                                Statement stmt)

This method will close (in a best effort fashion) the provided result set and its corresponding statement.

quietlyCloseStmt

public static void quietlyCloseStmt(Statement stmt)

quietlyShutdown

public static final void quietlyShutdown(OraclePropertyGraphBase opg)

Quietly shutdown a property graph.

Parameters:

opg - the property graph to be shutdown.

size

public static final <E> long size(Iterable<E> it)

This method returns the number of elements in the given Iterable object.

unescape

public static final String unescape(String s)

This method unescapes a string in the following manner: In one scan from left to right, a %2C is replaced with a comma ',', a %09 is replaced with a tab \t, a %0A is replaced with a newline \n, and %25 is replaced with a percentage %.

Parameters:

s - the string to be unescaped.

Returns:

a string representation of the unescaped string.

writeValue

public static final void writeValue(OutputStream os,
              Object value,
              byte[] baFieldDelimiter,
              SimpleDateFormat sdf)
                             throws IOException

This helper function serializes an object into the given output stream. The accepted object type of value can be String, Float, Integer, Double, Date, Boolean, and Serializable.

Parameters:

os - an OutputStream object

value - the value object to serialize.

baFieldDelimiter - the byte array representation of a fieldDelimiter to use when processing values in a flat file.

sdf - a SimpleDateFormat to use when parsing a Date value object.

Throws:

IOException