wt.query
Class DateExpression

java.lang.Object
  wt.query.ConstantExpression
      wt.query.DateExpression

All Implemented Interfaces:

ColumnExpression, Expression, Externalizable, OrderByExpression, RelationalExpression, Serializable

public class DateExpression

extends ConstantExpression

implements Externalizable

This class represents a date constant in a SQL statement. This subclass of ConstantExpression is necessary to provide the special handling for date values. The java date values are converted to a string representation and used within a TO_DATE() SQL function when used in SQL statements.

Supported API: true

Extendable: false

See Also:

Serialized Form

Field Summary

private static String	CLASSNAME
static String	DATE_JAVA_FORMAT
static String	DATE_JAVA_PARSE
private static DMLGenerator	dmlGenerator
static long	EXTERNALIZATION_VERSION_UID
private String	javaFormat
protected static long	OLD_FORMAT_VERSION_UID
private static String	RESOURCE
(package private) static long	serialVersionUID
static String	TIME_JAVA_FORMAT
static String	TIME_JAVA_PARSE
static String	TIMESTAMP_JAVA_FORMAT
static String	TIMESTAMP_JAVA_PARSE
private boolean	timezoneDependent
static String	UTIL_DATE_JAVA_PARSE

Fields inherited from class wt.query.ConstantExpression

DEBUG

Fields inherited from interface wt.query.ColumnExpression

ADVANCED_QUERY, ADVANCED_QUERY_ENABLED, COLUMN_ALIAS, JAVA_TYPE

Fields inherited from interface wt.query.Expression

FROM_COUNT

Fields inherited from interface wt.query.RelationalExpression

BIND_PARAMETER

Constructor Summary

DateExpression()


Supported API: false

DateExpression(Date a_value)


Supported API: false

DateExpression(Date a_value, String a_javaFormat, boolean a_useTimezone)


Supported API: false

Method Summary

private String	format(boolean a_includeQuote)
Object	getBindParameter() Gets the value of the attribute: bindParameter; Returns a bind parameter for this expression (if supported).
private DMLGenerator	getDMLGenerator()
String	getExpression(boolean a_useBind, Vector a_tableInfos, Vector a_aliases, boolean a_outerJoin) Return string representation of this expression.
private static ColumnExpression	newExpression(Date a_value)
private static ColumnExpression	newExpression(Date a_value, String a_javaType)
static ColumnExpression	newExpression(Object a_value, String a_javaType) Create a new Expression.
void	readExternal(ObjectInput input) Reads the non-transient fields of this class from an external source.
private boolean	readOldVersion(ObjectInput input, long readSerialVersionUID, boolean passThrough, boolean superDone) Reads the non-transient fields of this class from an external source, which is not the current version.
protected boolean	readVersion(DateExpression thisObject, ObjectInput input, long readSerialVersionUID, boolean passThrough, boolean superDone) Reads the non-transient fields of this class from an external source.
void	writeExternal(ObjectOutput output) Writes the non-transient fields of this class to an external source.

Methods inherited from class wt.query.ConstantExpression

getClassAttributes, getColumnAlias, getFromCount, getJavaType, getValue, isAdvancedQuery, isAdvancedQueryEnabled, isEscapeNeeded, isEscapeNeeded, isStringBased, isStringBased, isUseEscape, newExpression, readVersion, setAdvancedQueryEnabled, setColumnAlias, setFromAlias, setUseEscape, toString, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

RESOURCE

private static final String RESOURCE

See Also:

Constant Field Values

CLASSNAME

private static final String CLASSNAME

javaFormat

private String javaFormat

timezoneDependent

private boolean timezoneDependent

serialVersionUID

static final long serialVersionUID

See Also:

Constant Field Values

EXTERNALIZATION_VERSION_UID

public static final long EXTERNALIZATION_VERSION_UID

See Also:

Constant Field Values

OLD_FORMAT_VERSION_UID

protected static final long OLD_FORMAT_VERSION_UID

See Also:

Constant Field Values

DATE_JAVA_FORMAT

public static final String DATE_JAVA_FORMAT

TIME_JAVA_FORMAT

public static final String TIME_JAVA_FORMAT

TIMESTAMP_JAVA_FORMAT

public static final String TIMESTAMP_JAVA_FORMAT

DATE_JAVA_PARSE

public static final String DATE_JAVA_PARSE

See Also:

Constant Field Values

TIME_JAVA_PARSE

public static final String TIME_JAVA_PARSE

See Also:

Constant Field Values

TIMESTAMP_JAVA_PARSE

public static final String TIMESTAMP_JAVA_PARSE

See Also:

Constant Field Values

UTIL_DATE_JAVA_PARSE

public static final String UTIL_DATE_JAVA_PARSE

dmlGenerator

private static DMLGenerator dmlGenerator

Constructor Detail

DateExpression

public DateExpression()

Supported API: false

DateExpression

public DateExpression(Date a_value,
                      String a_javaFormat,
                      boolean a_useTimezone)

Supported API: false

Parameters:

a_value - Specifies the date value.

a_javaFormat - Specifies the date format used to construct the DateExpression.

a_useTimezone - Indicates if timezone (as specified in wt.properties) should be used construct the DateExpression.

See Also:

DateFormat

DateExpression

public DateExpression(Date a_value)

Supported API: false

Parameters:

a_value - Specifies the date constant value.

Method Detail

writeExternal

public void writeExternal(ObjectOutput output)
                   throws IOException

Writes the non-transient fields of this class to an external source.

Supported API: false

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class ConstantExpression

Parameters:

output -

Throws:

IOException

readExternal

public void readExternal(ObjectInput input)
                  throws IOException,
                         ClassNotFoundException

Reads the non-transient fields of this class from an external source.

Supported API: false

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class ConstantExpression

Parameters:

input -

Throws:

IOException

ClassNotFoundException

readVersion

protected boolean readVersion(DateExpression thisObject,
                              ObjectInput input,
                              long readSerialVersionUID,
                              boolean passThrough,
                              boolean superDone)
                       throws IOException,
                              ClassNotFoundException

Reads the non-transient fields of this class from an external source.

Supported API: false

Parameters:

thisObject -

input -

readSerialVersionUID -

passThrough -

superDone -

Returns:

boolean

Throws:

IOException

ClassNotFoundException

readOldVersion

private boolean readOldVersion(ObjectInput input,
                               long readSerialVersionUID,
                               boolean passThrough,
                               boolean superDone)
                        throws IOException,
                               ClassNotFoundException

Reads the non-transient fields of this class from an external source, which is not the current version.

Parameters:

input -

readSerialVersionUID -

passThrough -

superDone -

Returns:

boolean

Throws:

IOException

ClassNotFoundException

getBindParameter

public Object getBindParameter()
                        throws WTException

Gets the value of the attribute: bindParameter; Returns a bind parameter for this expression (if supported).

Supported API: false

Specified by:

getBindParameter in interface RelationalExpression

Overrides:

getBindParameter in class ConstantExpression

Returns:

Object

Throws:

WTException

getExpression

public String getExpression(boolean a_useBind,
                            Vector a_tableInfos,
                            Vector a_aliases,
                            boolean a_outerJoin)
                     throws QueryException

Return string representation of this expression.

Supported API: false

Specified by:

getExpression in interface RelationalExpression

Overrides:

getExpression in class ConstantExpression

Parameters:

a_useBind -

a_tableInfos -

a_aliases -

a_outerJoin - Indicates that outer join syntax should be used for this expression.

Returns:

String

Throws:

QueryException

newExpression

public static ColumnExpression newExpression(Object a_value,
                                             String a_javaType)

Create a new Expression.

Supported API: true

Parameters:

a_value - Specifies the data constant value.

a_javaType - Specifies the Java type of the value.

Returns:

ColumnExpression

newExpression

private static ColumnExpression newExpression(Date a_value)
                                       throws WTException

Throws:

WTException

newExpression

private static ColumnExpression newExpression(Date a_value,
                                              String a_javaType)
                                       throws WTException

Throws:

WTException

format

private final String format(boolean a_includeQuote)

getDMLGenerator

private DMLGenerator getDMLGenerator()