org.h2.value

Class ValueString

java.lang.Object

org.h2.value.Value

org.h2.value.ValueString

Direct Known Subclasses:

ValueStringFixed, ValueStringIgnoreCase

public class ValueString
extends Value

Implementation of the VARCHAR data type. It is also the base class for other ValueString* classes.

Nested Class Summary

Nested classes/interfaces inherited from class org.h2.value.Value

Value.ValueBlob, Value.ValueClob

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.String	value The string data.

Fields inherited from class org.h2.value.Value

ARRAY, BLOB, BOOLEAN, BYTE, BYTES, CLOB, DATE, DECIMAL, DOUBLE, ENUM, FLOAT, GEOMETRY, INT, JAVA_OBJECT, LONG, NULL, RESULT_SET, SHORT, STRING, STRING_FIXED, STRING_IGNORECASE, TIME, TIMESTAMP, TIMESTAMP_TZ, TYPE_COUNT, UNKNOWN, UUID

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ValueString(java.lang.String value)

Method Summary

Modifier and Type	Method and Description
protected int	compareSecure(Value o, CompareMode mode) Compare the value with another value of the same type.
Value	convertPrecision(long precision, boolean force) Convert the precision to the requested value.
boolean	equals(java.lang.Object other) Check if the two values have the same hash code.
static Value	get(java.lang.String s) Get or create a string value for the given string.
static Value	get(java.lang.String s, boolean treatEmptyStringsAsNull) Get or create a string value for the given string.
int	getDisplaySize() Get the display size in characters.
int	getMemory() Get the memory used by this object.
protected Value	getNew(java.lang.String s) Create a new String value of the current class.
java.lang.Object	getObject() Get the value as an object.
long	getPrecision() Get the precision.
java.lang.String	getSQL() Get the SQL expression for this value.
java.lang.String	getString() Get the value as a string.
int	getType() Get the value type.
int	hashCode()
void	set(java.sql.PreparedStatement prep, int parameterIndex) Set the value as a parameter in a prepared statement.

Methods inherited from class org.h2.value.Value

add, checkPrecision, clearCache, compareTo, compareTypeSafe, convertScale, convertTo, convertTo, convertTo, convertToEnum, copy, copyToResult, copyToTemp, divide, getBigDecimal, getBoolean, getByte, getBytes, getBytesNoCopy, getDataHandler, getDate, getDouble, getFloat, getHigherOrder, getInputStream, getInputStream, getInt, getLong, getReader, getReader, getResultSet, getScale, getShort, getSignum, getSmall, getTableId, getTime, getTimestamp, getTraceSQL, isLinkedToTable, modulus, multiply, negate, remove, subtract, throwUnsupportedExceptionForType, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

value

protected final java.lang.String value

The string data.

Constructor Detail

ValueString

protected ValueString(java.lang.String value)

Method Detail

getSQL

public java.lang.String getSQL()

Description copied from class: Value

Get the SQL expression for this value.

Specified by:

getSQL in class Value

Returns:

the SQL expression

equals

public boolean equals(java.lang.Object other)

Description copied from class: Value

Check if the two values have the same hash code. No data conversion is made; this method returns false if the other object is not of the same class. For some values, compareTo may return 0 even if equals return false. Example: ValueDecimal 0.0 and 0.00.

Specified by:

equals in class Value

Parameters:

other - the other value

Returns:

true if they are equal

compareSecure

protected int compareSecure(Value o,
                            CompareMode mode)

Description copied from class: Value

Compare the value with another value of the same type.

Specified by:

compareSecure in class Value

Parameters:

o - the other value

mode - the compare mode

Returns:

0 if both values are equal, -1 if the other value is smaller, and 1 otherwise

getString

public java.lang.String getString()

Description copied from class: Value

Get the value as a string.

Specified by:

getString in class Value

Returns:

the string

getPrecision

public long getPrecision()

Description copied from class: Value

Get the precision.

Specified by:

getPrecision in class Value

Returns:

the precision

getObject

public java.lang.Object getObject()

Description copied from class: Value

Get the value as an object.

Specified by:

getObject in class Value

Returns:

the object

set

public void set(java.sql.PreparedStatement prep,
                int parameterIndex)
         throws java.sql.SQLException

Description copied from class: Value

Set the value as a parameter in a prepared statement.

Specified by:

set in class Value

Parameters:

prep - the prepared statement

parameterIndex - the parameter index

Throws:

java.sql.SQLException

getDisplaySize

public int getDisplaySize()

Description copied from class: Value

Get the display size in characters.

Specified by:

getDisplaySize in class Value

Returns:

the display size

getMemory

public int getMemory()

Description copied from class: Value

Get the memory used by this object.

Overrides:

getMemory in class Value

Returns:

the memory used in bytes

convertPrecision

public Value convertPrecision(long precision,
                              boolean force)

Description copied from class: Value

Convert the precision to the requested value. The precision of the returned value may be somewhat larger than requested, because values with a fixed precision are not truncated.

Overrides:

convertPrecision in class Value

Parameters:

precision - the new precision

force - true if losing numeric precision is allowed

Returns:

the new value

hashCode

public int hashCode()

Specified by:

hashCode in class Value

getType

public int getType()

Description copied from class: Value

Get the value type.

Specified by:

getType in class Value

Returns:

the type

get

public static Value get(java.lang.String s)

Get or create a string value for the given string.

Parameters:

s - the string

Returns:

the value

get

public static Value get(java.lang.String s,
                        boolean treatEmptyStringsAsNull)

Get or create a string value for the given string.

Parameters:

s - the string

treatEmptyStringsAsNull - whether or not to treat empty strings as NULL

Returns:

the value

getNew

protected Value getNew(java.lang.String s)

Create a new String value of the current class. This method is meant to be overridden by subclasses.

Parameters:

s - the string

Returns:

the value