org.springframework.batch.item.file.transform
Interface FieldSet

All Known Implementing Classes:

DefaultFieldSet

public interface FieldSet

Interface used by flat file input sources to encapsulate concerns of converting an array of Strings to Java native types. A bit like the role played by ResultSet in JDBC, clients will know the name or position of strongly typed fields that they want to extract.

Author:

Dave Syer

Method Summary

int	getFieldCount() Return the number of fields in this 'FieldSet'.
String[]	getNames() Accessor for the names of the fields.
Properties	getProperties() Construct name-value pairs from the field names and string values.
String[]	getValues()
boolean	hasNames() Check if there are names defined for the fields.
BigDecimal	readBigDecimal(int index) Read the BigDecimal value at index 'index'.
BigDecimal	readBigDecimal(int index, BigDecimal defaultValue) Read the BigDecimal value at index 'index', returning the supplied defaultValue if the trimmed string value at index 'index' is blank.
BigDecimal	readBigDecimal(String name) Read the BigDecimal value from column with given 'name.
BigDecimal	readBigDecimal(String name, BigDecimal defaultValue) Read the BigDecimal value from column with given 'name, returning the supplied defaultValue if the trimmed string value at index 'index' is blank.
boolean	readBoolean(int index) Read the 'boolean' value at index 'index'.
boolean	readBoolean(int index, String trueValue) Read the 'boolean' value at index 'index'.
boolean	readBoolean(String name) Read the 'boolean' value from column with given 'name'.
boolean	readBoolean(String name, String trueValue) Read the 'boolean' value from column with given 'name'.
byte	readByte(int index) Read the 'byte' value at index 'index'.
byte	readByte(String name) Read the 'byte' value from column with given 'name'.
char	readChar(int index) Read the 'char' value at index 'index'.
char	readChar(String name) Read the 'char' value from column with given 'name'.
Date	readDate(int index) Read the java.util.Date value in default format at designated column index.
Date	readDate(int index, String pattern) Read the java.util.Date value in default format at designated column index.
Date	readDate(String name) Read the java.sql.Date value in given format from column with given name.
Date	readDate(String name, String pattern) Read the java.sql.Date value in given format from column with given name.
double	readDouble(int index) Read the 'double' value at index 'index'.
double	readDouble(String name) Read the 'double' value from column with given 'name.
float	readFloat(int index) Read the 'float' value at index 'index'.
float	readFloat(String name) Read the 'float' value from column with given 'name.
int	readInt(int index) Read the 'int' value at index 'index'.
int	readInt(int index, int defaultValue) Read the 'int' value at index 'index', using the supplied defaultValue if the field value is blank.
int	readInt(String name) Read the 'int' value from column with given 'name'.
int	readInt(String name, int defaultValue) Read the 'int' value from column with given 'name', using the supplied defaultValue if the field value is blank.
long	readLong(int index) Read the 'long' value at index 'index'.
long	readLong(int index, long defaultValue) Read the 'long' value at index 'index', using the supplied defaultValue if the field value is blank.
long	readLong(String name) Read the 'long' value from column with given 'name'.
long	readLong(String name, long defaultValue) Read the 'long' value from column with given 'name', using the supplied defaultValue if the field value is blank.
String	readRawString(int index) Read the String value at index 'index' including trailing whitespace (don't trim).
String	readRawString(String name) Read the String value from column with given 'name' including trailing whitespace (don't trim).
short	readShort(int index) Read the 'short' value at index 'index'.
short	readShort(String name) Read the 'short' value from column with given 'name'.
String	readString(int index) Read the String value at index 'index'.
String	readString(String name) Read the String value from column with given 'name'.

Method Detail

getNames

String[] getNames()

Accessor for the names of the fields.

Returns:

the names

Throws:

IllegalStateException - if the names are not defined

hasNames

boolean hasNames()

Check if there are names defined for the fields.

Returns:

true if there are names for the fields

getValues

String[] getValues()

Returns:

fields wrapped by this 'FieldSet' instance as String values.

readString

String readString(int index)

Read the String value at index 'index'.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readString

String readString(String name)

Read the String value from column with given 'name'.

Parameters:

name - the field name.

readRawString

String readRawString(int index)

Read the String value at index 'index' including trailing whitespace (don't trim).

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readRawString

String readRawString(String name)

Read the String value from column with given 'name' including trailing whitespace (don't trim).

Parameters:

name - the field name.

readBoolean

boolean readBoolean(int index)

Read the 'boolean' value at index 'index'.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readBoolean

boolean readBoolean(String name)

Read the 'boolean' value from column with given 'name'.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readBoolean

boolean readBoolean(int index,
                    String trueValue)

Read the 'boolean' value at index 'index'.

Parameters:

index - the field index.

trueValue - the value that signifies true; case-sensitive.

Throws:

IndexOutOfBoundsException - if the index is out of bounds, or if the supplied trueValue is null.

readBoolean

boolean readBoolean(String name,
                    String trueValue)

Read the 'boolean' value from column with given 'name'.

Parameters:

name - the field name.

trueValue - the value that signifies true; case-sensitive.

Throws:

IllegalArgumentException - if a column with given name is not defined, or if the supplied trueValue is null.

readChar

char readChar(int index)

Read the 'char' value at index 'index'.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readChar

char readChar(String name)

Read the 'char' value from column with given 'name'.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readByte

byte readByte(int index)

Read the 'byte' value at index 'index'.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readByte

byte readByte(String name)

Read the 'byte' value from column with given 'name'.

Parameters:

name - the field name.

readShort

short readShort(int index)

Read the 'short' value at index 'index'.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readShort

short readShort(String name)

Read the 'short' value from column with given 'name'.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readInt

int readInt(int index)

Read the 'int' value at index 'index'.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readInt

int readInt(String name)

Read the 'int' value from column with given 'name'.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readInt

int readInt(int index,
            int defaultValue)

Read the 'int' value at index 'index', using the supplied defaultValue if the field value is blank.

Parameters:

index - the field index..

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readInt

int readInt(String name,
            int defaultValue)

Read the 'int' value from column with given 'name', using the supplied defaultValue if the field value is blank.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readLong

long readLong(int index)

Read the 'long' value at index 'index'.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readLong

long readLong(String name)

Read the 'long' value from column with given 'name'.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readLong

long readLong(int index,
              long defaultValue)

Read the 'long' value at index 'index', using the supplied defaultValue if the field value is blank.

Parameters:

index - the field index..

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readLong

long readLong(String name,
              long defaultValue)

Read the 'long' value from column with given 'name', using the supplied defaultValue if the field value is blank.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readFloat

float readFloat(int index)

Read the 'float' value at index 'index'.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readFloat

float readFloat(String name)

Read the 'float' value from column with given 'name.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readDouble

double readDouble(int index)

Read the 'double' value at index 'index'.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readDouble

double readDouble(String name)

Read the 'double' value from column with given 'name.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readBigDecimal

BigDecimal readBigDecimal(int index)

Read the BigDecimal value at index 'index'.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readBigDecimal

BigDecimal readBigDecimal(String name)

Read the BigDecimal value from column with given 'name.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readBigDecimal

BigDecimal readBigDecimal(int index,
                          BigDecimal defaultValue)

Read the BigDecimal value at index 'index', returning the supplied defaultValue if the trimmed string value at index 'index' is blank.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readBigDecimal

BigDecimal readBigDecimal(String name,
                          BigDecimal defaultValue)

Read the BigDecimal value from column with given 'name, returning the supplied defaultValue if the trimmed string value at index 'index' is blank.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readDate

Date readDate(int index)

Read the java.util.Date value in default format at designated column index.

Parameters:

index - the field index.

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

readDate

Date readDate(String name)

Read the java.sql.Date value in given format from column with given name.

Parameters:

name - the field name.

Throws:

IllegalArgumentException - if a column with given name is not defined.

readDate

Date readDate(int index,
              String pattern)

Read the java.util.Date value in default format at designated column index.

Parameters:

index - the field index.

pattern - the pattern describing the date and time format

Throws:

IndexOutOfBoundsException - if the index is out of bounds.

IllegalArgumentException - if the date cannot be parsed.

readDate

Date readDate(String name,
              String pattern)

Read the java.sql.Date value in given format from column with given name.

Parameters:

name - the field name.

pattern - the pattern describing the date and time format

Throws:

IllegalArgumentException - if a column with given name is not defined or if the specified field cannot be parsed

getFieldCount

int getFieldCount()

Return the number of fields in this 'FieldSet'.

getProperties

Properties getProperties()

Construct name-value pairs from the field names and string values. Null values are omitted.

Returns:

some properties representing the field set.

Throws:

IllegalStateException - if the field name meta data is not available.