Skip navigation links

com.tangosol.io.pof
Class WritingPofHandler

java.lang.Object
com.tangosol.util.Base
com.tangosol.io.pof.PofHelper
com.tangosol.io.pof.WritingPofHandler

All Implemented Interfaces:

PofConstants, PofHandler

public class WritingPofHandler

extends PofHelper

implements PofHandler

An implementation of PofHandler that writes a POF stream to a WriteBuffer using a BufferOutput object.

Since:

Coherence 3.2

Author:

cp 2006.07.11

Nested Class Summary

static class	WritingPofHandler.Complex A Complex object represents the current complex data structure in the POF stream.
static class	WritingPofHandler.ComplexMap A ComplexMap object represents a map data structure (with uniform keys or with uniform keys and values) in the POF stream.

Nested classes/interfaces inherited from class com.tangosol.io.pof.PofHelper

PofHelper.ReadableEntrySetMap, PofHelper.WriteableEntrySetMap

Field Summary

Fields inherited from class com.tangosol.io.pof.PofHelper

BIGDECIMAL_ZERO, BINARY_EMPTY, BOOLEAN_ARRAY_EMPTY, BYTE_ARRAY_EMPTY, CHAR_ARRAY_EMPTY, COLLECTION_EMPTY, DOUBLE_ARRAY_EMPTY, FLOAT_ARRAY_EMPTY, INT_ARRAY_EMPTY, LONG_ARRAY_EMPTY, OBJECT_ARRAY_EMPTY, SHORT_ARRAY_EMPTY

Fields inherited from interface com.tangosol.io.pof.PofConstants

J_BIG_DECIMAL, J_BIG_INTEGER, J_BINARY, J_BOOLEAN, J_BOOLEAN_ARRAY, J_BYTE, J_BYTE_ARRAY, J_CHAR_ARRAY, J_CHARACTER, J_COLLECTION, J_DATE, J_DATETIME, J_DOUBLE, J_DOUBLE_ARRAY, J_FLOAT, J_FLOAT_ARRAY, J_INT_ARRAY, J_INTEGER, J_LONG, J_LONG_ARRAY, J_MAP, J_NULL, J_OBJECT_ARRAY, J_QUAD, J_RAW_DATE, J_RAW_DATETIME, J_RAW_DAY_TIME_INTERVAL, J_RAW_TIME, J_RAW_TIME_INTERVAL, J_RAW_YEAR_MONTH_INTERVAL, J_SHORT, J_SHORT_ARRAY, J_SPARSE_ARRAY, J_STRING, J_TIME, J_TIMESTAMP, J_USER_TYPE, MAX_DECIMAL128_SCALE, MAX_DECIMAL128_UNSCALED, MAX_DECIMAL32_SCALE, MAX_DECIMAL32_UNSCALED, MAX_DECIMAL64_SCALE, MAX_DECIMAL64_UNSCALED, MIN_DECIMAL128_SCALE, MIN_DECIMAL32_SCALE, MIN_DECIMAL64_SCALE, T_ARRAY, T_BOOLEAN, T_CHAR, T_CHAR_STRING, T_COLLECTION, T_DATE, T_DATETIME, T_DAY_TIME_INTERVAL, T_DECIMAL128, T_DECIMAL32, T_DECIMAL64, T_FLOAT128, T_FLOAT32, T_FLOAT64, T_IDENTITY, T_INT128, T_INT16, T_INT32, T_INT64, T_MAP, T_OCTET, T_OCTET_STRING, T_REFERENCE, T_SPARSE_ARRAY, T_TIME, T_TIME_INTERVAL, T_UNIFORM_ARRAY, T_UNIFORM_COLLECTION, T_UNIFORM_KEYS_MAP, T_UNIFORM_MAP, T_UNIFORM_SPARSE_ARRAY, T_YEAR_MONTH_INTERVAL, V_BOOLEAN_FALSE, V_BOOLEAN_TRUE, V_COLLECTION_EMPTY, V_FP_NAN, V_FP_NEG_INFINITY, V_FP_POS_INFINITY, V_INT_0, V_INT_1, V_INT_10, V_INT_11, V_INT_12, V_INT_13, V_INT_14, V_INT_15, V_INT_16, V_INT_17, V_INT_18, V_INT_19, V_INT_2, V_INT_20, V_INT_21, V_INT_22, V_INT_3, V_INT_4, V_INT_5, V_INT_6, V_INT_7, V_INT_8, V_INT_9, V_INT_NEG_1, V_REFERENCE_NULL, V_STRING_ZERO_LENGTH

Constructor Summary

WritingPofHandler(WriteBuffer.BufferOutput out)
Construct a Writing POF Handler that will write a POF stream to the passed BufferOutput object.

Method Summary

void	beginArray(int iPos, int cElements) Report that an array of values has been encountered in the POF stream.
void	beginCollection(int iPos, int cElements) Report that a collection of values has been encountered in the POF stream.
void	beginMap(int iPos, int cElements) Report that a map of key/value pairs has been encountered in the POF stream.
void	beginSparseArray(int iPos, int cElements) Report that a sparse array of values has been encountered in the POF stream.
void	beginUniformArray(int iPos, int cElements, int nType) Report that a uniform array of values has been encountered in the POF stream.
void	beginUniformCollection(int iPos, int cElements, int nType) Report that a uniform collection of values has been encountered in the POF stream.
void	beginUniformKeysMap(int iPos, int cElements, int nTypeKeys) Report that a map of key/value pairs (with the keys being of a uniform type) has been encountered in the POF stream.
void	beginUniformMap(int iPos, int cElements, int nTypeKeys, int nTypeValues) Report that a map of key/value pairs (with the keys being of a uniform type and the values being of a uniform type) has been encountered in the POF stream.
void	beginUniformSparseArray(int iPos, int cElements, int nType) Report that a uniform sparse array of values has been encountered in the POF stream.
void	beginUserType(int iPos, int nUserTypeId, int nVersionId) Report that a value of a "user type" has been encountered in the POF stream.
protected void	encodePosition(int iPos) Called for each and every value going into the POF stream, in case the value needs its position to be encoded into the stream.
void	endComplexValue() Signifies the termination of the current complex value.
WriteBuffer.BufferOutput	getBufferOutput() Obtain the DataOutput object that this Writing POF Handler is writing to.
protected WritingPofHandler.Complex	getComplex() Obtain the current Complex object that represents the complex type that is being written to the POF stream.
protected boolean	isCompressable() Determine if the value encoding can be compressed by combining type and value information in such a way that type information could be lost.
protected boolean	isSkippable() Determine if the value encoding can be skipped.
protected boolean	isTypeIdEncoded(int nTypeId) Determine if the type should be encoded for the current value.
void	onBoolean(int iPos, boolean f) Report that a boolean value has been encountered in the POF stream.
void	onChar(int iPos, char ch) Report that a character value has been encountered in the POF stream.
void	onCharString(int iPos, java.lang.String s) Report that a character string value has been encountered in the POF stream.
void	onDate(int iPos, int nYear, int nMonth, int nDay) Report that a date value has been encountered in the POF stream.
void	onDateTime(int iPos, int nYear, int nMonth, int nDay, int nHour, int nMinute, int nSecond, int nNano, boolean fUTC) Report that a date-time value has been encountered in the POF stream.
void	onDateTime(int iPos, int nYear, int nMonth, int nDay, int nHour, int nMinute, int nSecond, int nNano, int nHourOffset, int nMinuteOffset) Report that a date-time value (with a timezone offset) has been encountered in the POF stream.
void	onDayTimeInterval(int iPos, int cDays, int cHours, int cMinutes, int cSeconds, int cNanos) Report that a day-time interval value has been encountered in the POF stream.
void	onDecimal128(int iPos, java.math.BigDecimal dec) Report that a quad-precision decimal value (a base-10 floating point) has been encountered in the POF stream.
void	onDecimal32(int iPos, java.math.BigDecimal dec) Report that a single-precision decimal value (a base-10 floating point) has been encountered in the POF stream.
void	onDecimal64(int iPos, java.math.BigDecimal dec) Report that a double-precision decimal value (a base-10 floating point) has been encountered in the POF stream.
void	onFloat128(int iPos, RawQuad qfl) Report that a base-2 quad-precision floating point value has been encountered in the POF stream.
void	onFloat32(int iPos, float fl) Report that a base-2 single-precision floating point value has been encountered in the POF stream.
void	onFloat64(int iPos, double dfl) Report that a base-2 double-precision floating point value has been encountered in the POF stream.
void	onIdentityReference(int iPos, int nId) Specifies that a reference to a previously-identified value has been encountered in the POF stream.
void	onInt128(int iPos, java.math.BigInteger n) Report that a 128-bit integer value has been encountered in the POF stream.
void	onInt16(int iPos, short n) Report that a short integer value has been encountered in the POF stream.
void	onInt32(int iPos, int n) Report that an integer value has been encountered in the POF stream.
void	onInt64(int iPos, long n) Report that a long integer value has been encountered in the POF stream.
void	onNullReference(int iPos) Specifies that a null value has been encountered in the POF stream.
void	onOctet(int iPos, int b) Report that an octet value (a byte) has been encountered in the POF stream.
void	onOctetString(int iPos, Binary bin) Report that a octet string value has been encountered in the POF stream.
void	onTime(int iPos, int nHour, int nMinute, int nSecond, int nNano, boolean fUTC) Report that a time value has been encountered in the POF stream.
void	onTime(int iPos, int nHour, int nMinute, int nSecond, int nNano, int nHourOffset, int nMinuteOffset) Report that a time value (with a timezone offset) has been encountered in the POF stream.
void	onTimeInterval(int iPos, int cHours, int cMinutes, int cSeconds, int cNanos) Report that a time interval value has been encountered in the POF stream.
void	onYearMonthInterval(int iPos, int cYears, int cMonths) Report that a year-month interval value has been encountered in the POF stream.
void	registerIdentity(int nId) This method is invoked when an identity is encountered in the POF stream.

Methods inherited from class com.tangosol.io.pof.PofHelper

calcDecimalSize, checkDate, checkDayTimeInterval, checkDecimalRange, checkElementCount, checkReferenceRange, checkTime, checkTimeInterval, checkTimeZone, checkType, checkYearMonthInterval, convertNumber, convertToDate, decodeTinyInt, encodeTinyInt, formatDate, formatTime, formatTime, getJavaTypeId, getPofTypeId, readAsBigDecimal, readAsBigInteger, readAsChar, readAsDouble, readAsFloat, readAsInt, readAsLong, readAsQuad, readBigDecimal, readBigInteger, readChar, readQuad, readRawDate, readRawTime, resizeArray, skipPackedInts, skipUniformValue, skipValue, writeBigDecimal, writeBigInteger, writeDate, writeTime

Constructor Detail

WritingPofHandler

public WritingPofHandler(WriteBuffer.BufferOutput out)

Construct a Writing POF Handler that will write a POF stream to the passed BufferOutput object.

Parameters:

out - the BufferOutput to write to

Method Detail

registerIdentity

public void registerIdentity(int nId)

This method is invoked when an identity is encountered in the POF stream. The identity is used to uniquely identify the next value in the POF stream, and can be later referenced by the PofHandler.onIdentityReference(int, int) method.

Specified by:

registerIdentity in interface PofHandler

Parameters:

nId - if (nId >= 0), then this is the identity encountered in the POF stream, otherwise it is an indicator that the following value could have been assigned an identifier but was not (i.e. that the subsequent value is of a referenceable data type)

onNullReference

public void onNullReference(int iPos)

Specifies that a null value has been encountered in the POF stream.

Specified by:

onNullReference in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

onIdentityReference

public void onIdentityReference(int iPos,
                                int nId)

Specifies that a reference to a previously-identified value has been encountered in the POF stream.

Specified by:

onIdentityReference in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

nId - the identity of the previously encountered value, as was specified in a previous call to PofHandler.registerIdentity(int)

onInt16

public void onInt16(int iPos,
                    short n)

Report that a short integer value has been encountered in the POF stream.

Specified by:

onInt16 in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

n - the integer value as a short

onInt32

public void onInt32(int iPos,
                    int n)

Report that an integer value has been encountered in the POF stream.

Specified by:

onInt32 in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

n - the integer value as an int

onInt64

public void onInt64(int iPos,
                    long n)

Report that a long integer value has been encountered in the POF stream.

Specified by:

onInt64 in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

n - the integer value as a long

onInt128

public void onInt128(int iPos,
                     java.math.BigInteger n)

Report that a 128-bit integer value has been encountered in the POF stream.

Specified by:

onInt128 in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

n - the integer value as a BigInteger

onFloat32

public void onFloat32(int iPos,
                      float fl)

Report that a base-2 single-precision floating point value has been encountered in the POF stream.

Specified by:

onFloat32 in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

fl - the floating point value as a float

onFloat64

public void onFloat64(int iPos,
                      double dfl)

Report that a base-2 double-precision floating point value has been encountered in the POF stream.

Specified by:

onFloat64 in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

dfl - the floating point value as a double

onFloat128

public void onFloat128(int iPos,
                       RawQuad qfl)

Report that a base-2 quad-precision floating point value has been encountered in the POF stream.

Specified by:

onFloat128 in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

qfl - the floating point value as a quad

onDecimal32

public void onDecimal32(int iPos,
                        java.math.BigDecimal dec)

Report that a single-precision decimal value (a base-10 floating point) has been encountered in the POF stream.

Specified by:

onDecimal32 in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

dec - the decimal value as a BigDecimal

onDecimal64

public void onDecimal64(int iPos,
                        java.math.BigDecimal dec)

Report that a double-precision decimal value (a base-10 floating point) has been encountered in the POF stream.

Specified by:

onDecimal64 in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

dec - the decimal value as a BigDecimal

onDecimal128

public void onDecimal128(int iPos,
                         java.math.BigDecimal dec)

Report that a quad-precision decimal value (a base-10 floating point) has been encountered in the POF stream.

Specified by:

onDecimal128 in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

dec - the decimal value as a BigDecimal

onBoolean

public void onBoolean(int iPos,
                      boolean f)

Report that a boolean value has been encountered in the POF stream.

Specified by:

onBoolean in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

f - the boolean value

onOctet

public void onOctet(int iPos,
                    int b)

Report that an octet value (a byte) has been encountered in the POF stream.

Specified by:

onOctet in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

b - the octet value as an int whose value is in the range 0 to 255 (0x00-0xFF) inclusive

onOctetString

public void onOctetString(int iPos,
                          Binary bin)

Report that a octet string value has been encountered in the POF stream.

Specified by:

onOctetString in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

bin - the octect string value as a Binary object

onChar

public void onChar(int iPos,
                   char ch)

Report that a character value has been encountered in the POF stream.

Specified by:

onChar in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

ch - the character value as a char

onCharString

public void onCharString(int iPos,
                         java.lang.String s)

Report that a character string value has been encountered in the POF stream.

Specified by:

onCharString in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

s - the character string value as a String object

onDate

public void onDate(int iPos,
                   int nYear,
                   int nMonth,
                   int nDay)

Report that a date value has been encountered in the POF stream.

Specified by:

onDate in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

nYear - the year number as defined by ISO8601; note the difference with the Java Date class, whose year is relative to 1900

nMonth - the month number between 1 and 12 inclusive as defined by ISO8601; note the difference from the Java Date class, whose month value is 0-based (0-11)

nDay - the day number between 1 and 31 inclusive as defined by ISO8601

onYearMonthInterval

public void onYearMonthInterval(int iPos,
                                int cYears,
                                int cMonths)

Report that a year-month interval value has been encountered in the POF stream.

Specified by:

onYearMonthInterval in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cYears - the number of years in the year-month interval

cMonths - the number of months in the year-month interval

onTime

public void onTime(int iPos,
                   int nHour,
                   int nMinute,
                   int nSecond,
                   int nNano,
                   boolean fUTC)

Report that a time value has been encountered in the POF stream.

Specified by:

onTime in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

nHour - the hour between 0 and 23 inclusive

nMinute - the minute value between 0 and 59 inclusive

nSecond - the second value between 0 and 59 inclusive (and theoretically 60 for a leap-second)

nNano - the nanosecond value between 0 and 999999999 inclusive

fUTC - true if the time value is UTC or false if the time value does not have an explicit time zone

onTime

public void onTime(int iPos,
                   int nHour,
                   int nMinute,
                   int nSecond,
                   int nNano,
                   int nHourOffset,
                   int nMinuteOffset)

Report that a time value (with a timezone offset) has been encountered in the POF stream.

Specified by:

onTime in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

nHour - the hour between 0 and 23 inclusive

nMinute - the minute value between 0 and 59 inclusive

nSecond - the second value between 0 and 59 inclusive (and theoretically 60 for a leap-second)

nNano - the nanosecond value between 0 and 999999999 inclusive

nHourOffset - the timezone offset in hours from UTC, for example 0 for BST, -5 for EST and 1 for CET

nMinuteOffset - the timezone offset in minutes, for example 0 (in most cases) or 30

See Also:

worldtimezone.com

onTimeInterval

public void onTimeInterval(int iPos,
                           int cHours,
                           int cMinutes,
                           int cSeconds,
                           int cNanos)

Report that a time interval value has been encountered in the POF stream.

Specified by:

onTimeInterval in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cHours - the number of hours in the time interval

cMinutes - the number of minutes in the time interval, from 0 to 59 inclusive

cSeconds - the number of seconds in the time interval, from 0 to 59 inclusive

cNanos - the number of nanoseconds, from 0 to 999999999 inclusive

onDateTime

public void onDateTime(int iPos,
                       int nYear,
                       int nMonth,
                       int nDay,
                       int nHour,
                       int nMinute,
                       int nSecond,
                       int nNano,
                       boolean fUTC)

Report that a date-time value has been encountered in the POF stream.

Specified by:

onDateTime in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

nYear - the year number as defined by ISO8601; note the difference with the Java Date class, whose year is relative to 1900

nMonth - the month number between 1 and 12 inclusive as defined by ISO8601; note the difference from the Java Date class, whose month value is 0-based (0-11)

nDay - the day number between 1 and 31 inclusive as defined by ISO8601

nHour - the hour between 0 and 23 inclusive

nMinute - the minute value between 0 and 59 inclusive

nSecond - the second value between 0 and 59 inclusive (and theoretically 60 for a leap-second)

nNano - the nanosecond value between 0 and 999999999 inclusive

fUTC - true if the time value is UTC or false if the time value does not have an explicit time zone

onDateTime

public void onDateTime(int iPos,
                       int nYear,
                       int nMonth,
                       int nDay,
                       int nHour,
                       int nMinute,
                       int nSecond,
                       int nNano,
                       int nHourOffset,
                       int nMinuteOffset)

Report that a date-time value (with a timezone offset) has been encountered in the POF stream.

Specified by:

onDateTime in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

nYear - the year number as defined by ISO8601; note the difference with the Java Date class, whose year is relative to 1900

nMonth - the month number between 1 and 12 inclusive as defined by ISO8601; note the difference from the Java Date class, whose month value is 0-based (0-11)

nDay - the day number between 1 and 31 inclusive as defined by ISO8601

nHour - the hour between 0 and 23 inclusive

nMinute - the minute value between 0 and 59 inclusive

nSecond - the second value between 0 and 59 inclusive (and theoretically 60 for a leap-second)

nNano - the nanosecond value between 0 and 999999999 inclusive

nHourOffset - the timezone offset in hours from UTC, for example 0 for BST, -5 for EST and 1 for CET

nMinuteOffset - the timezone offset in minutes, for example 0 (in most cases) or 30

onDayTimeInterval

public void onDayTimeInterval(int iPos,
                              int cDays,
                              int cHours,
                              int cMinutes,
                              int cSeconds,
                              int cNanos)

Report that a day-time interval value has been encountered in the POF stream.

Specified by:

onDayTimeInterval in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cDays - the number of days in the day-time interval

cHours - the number of hours in the day-time interval, from 0 to 23 inclusive

cMinutes - the number of minutes in the day-time interval, from 0 to 59 inclusive

cSeconds - the number of seconds in the day-time interval, from 0 to 59 inclusive

cNanos - the number of nanoseconds in the day-time interval, from 0 to 999999999 inclusive

beginCollection

public void beginCollection(int iPos,
                            int cElements)

Report that a collection of values has been encountered in the POF stream. <p/> This method call will be followed by a separate call to an "on" or "begin" method for each of the cElements elements in the collection, and the collection extent will then be terminated by a call to PofHandler.endComplexValue().

Specified by:

beginCollection in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cElements - the exact number of values (elements) in the collection

beginUniformCollection

public void beginUniformCollection(int iPos,
                                   int cElements,
                                   int nType)

Report that a uniform collection of values has been encountered in the POF stream. <p/> This method call will be followed by a separate call to an "on" or "begin" method for each of the cElements elements in the collection, and the collection extent will then be terminated by a call to PofHandler.endComplexValue().

Specified by:

beginUniformCollection in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cElements - the exact number of values (elements) in the collection

nType - the type identifier for all of the values in the uniform collection

beginArray

public void beginArray(int iPos,
                       int cElements)

Report that an array of values has been encountered in the POF stream. <p/> This method call will be followed by a separate call to an "on" or "begin" method for each of the cElements elements in the array, and the array extent will then be terminated by a call to PofHandler.endComplexValue().

Specified by:

beginArray in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cElements - the exact number of values (elements) in the array

beginUniformArray

public void beginUniformArray(int iPos,
                              int cElements,
                              int nType)

Report that a uniform array of values has been encountered in the POF stream. <p/> This method call will be followed by a separate call to an "on" or "begin" method for each of the cElements elements in the array, and the array extent will then be terminated by a call to PofHandler.endComplexValue().

Specified by:

beginUniformArray in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cElements - the exact number of values (elements) in the array

nType - the type identifier for all of the values in the uniform array

beginSparseArray

public void beginSparseArray(int iPos,
                             int cElements)

Report that a sparse array of values has been encountered in the POF stream. <p/> This method call will be followed by a separate call to an "on" or "begin" method for present element in the sparse array (up to cElements elements), and the array extent will then be terminated by a call to PofHandler.endComplexValue().

Specified by:

beginSparseArray in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cElements - the exact number of elements in the array, which is greater than or equal to the number of values in the sparse POF stream; in other words, the number of values that will subsequently be reported will not exceed this number

beginUniformSparseArray

public void beginUniformSparseArray(int iPos,
                                    int cElements,
                                    int nType)

Report that a uniform sparse array of values has been encountered in the POF stream. <p/> This method call will be followed by a separate call to an "on" or "begin" method for present element in the sparse array (up to cElements elements), and the array extent will then be terminated by a call to PofHandler.endComplexValue().

Specified by:

beginUniformSparseArray in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cElements - the exact number of elements in the array, which is greater than or equal to the number of values in the sparse POF stream; in other words, the number of values that will subsequently be reported will not exceed this number

nType - the type identifier for all of the values in the uniform sparse array

beginMap

public void beginMap(int iPos,
                     int cElements)

Report that a map of key/value pairs has been encountered in the POF stream. <p/> This method call will be followed by a separate call to an "on" or "begin" method for each of the cElements elements in the map, and the map extent will then be terminated by a call to PofHandler.endComplexValue().

Specified by:

beginMap in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cElements - the exact number of key/value pairs (entries) in the map

beginUniformKeysMap

public void beginUniformKeysMap(int iPos,
                                int cElements,
                                int nTypeKeys)

Report that a map of key/value pairs (with the keys being of a uniform type) has been encountered in the POF stream. <p/> This method call will be followed by a separate call to an "on" or "begin" method for each of the cElements elements in the map, and the map extent will then be terminated by a call to PofHandler.endComplexValue().

Specified by:

beginUniformKeysMap in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cElements - the exact number of key/value pairs (entries) in the map

nTypeKeys - the type identifier for all of the keys in the uniform-keys map

beginUniformMap

public void beginUniformMap(int iPos,
                            int cElements,
                            int nTypeKeys,
                            int nTypeValues)

Report that a map of key/value pairs (with the keys being of a uniform type and the values being of a uniform type) has been encountered in the POF stream. <p/> This method call will be followed by a separate call to an "on" or "begin" method for each of the cElements elements in the map, and the map extent will then be terminated by a call to PofHandler.endComplexValue().

Specified by:

beginUniformMap in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

cElements - the exact number of key/value pairs (entries) in the map

nTypeKeys - the type identifier for all of the keys in the uniform map

nTypeValues - the type identifier for all of the values in the uniform map

beginUserType

public void beginUserType(int iPos,
                          int nUserTypeId,
                          int nVersionId)

Report that a value of a "user type" has been encountered in the POF stream. A user type is analogous to a "class", and a value of a user type is analogous to an "object". <p/> This method call will be followed by a separate call to an "on" or "begin" method for each of the property values in the user type, and the user type will then be terminated by a call to PofHandler.endComplexValue().

Specified by:

beginUserType in interface PofHandler

Parameters:

iPos - context-sensitive position information: property index within a user type, array index within an array, element counter within a collection, entry counter within a map, -1 otherwise

nUserTypeId - the user type identifier, (nUserTypeId >= 0)

nVersionId - the version identifier for the user data type data in the POF stream, (nVersionId >= 0)

endComplexValue

public void endComplexValue()

Signifies the termination of the current complex value. Complex values are any of the collection, array, map and user types. For each call to one of the "begin" methods, there will be a corresponding call to this method, even if there were no contents in the complex value.

Specified by:

endComplexValue in interface PofHandler

getBufferOutput

public WriteBuffer.BufferOutput getBufferOutput()

Obtain the DataOutput object that this Writing POF Handler is writing to.

Returns:

the DataOutput object that this POF handler is writing to

getComplex

protected WritingPofHandler.Complex getComplex()

Obtain the current Complex object that represents the complex type that is being written to the POF stream.

Returns:

the current Complex object

isSkippable

protected boolean isSkippable()

Determine if the value encoding can be skipped. A value can be skipped if it is a default value and if it does not have an identity and if it is in a sparse data structure.

Returns:

true iff value encoding of default values can be skipped altogether

isCompressable

protected boolean isCompressable()

Determine if the value encoding can be compressed by combining type and value information in such a way that type information could be lost.

Returns:

true iff values can be encoded without type information

encodePosition

protected void encodePosition(int iPos)

Called for each and every value going into the POF stream, in case the value needs its position to be encoded into the stream.

Parameters:

iPos - the position (property index, array index, etc.)

isTypeIdEncoded

protected boolean isTypeIdEncoded(int nTypeId)

Determine if the type should be encoded for the current value.

Parameters:

nTypeId - the type of the current value

Returns:

true if the type ID should be placed into the POF stream, and false if only the value itself should be placed into the stream

Skip navigation links