Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> iapi >> [ types overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

org.apache.derby.iapi.types
Class JSQLType  

java.lang.Object
  org.apache.derby.iapi.types.JSQLType

All Implemented Interfaces:

java.io.Externalizable, org.apache.derby.iapi.services.io.Formatable, java.io.Serializable, org.apache.derby.iapi.services.io.TypedFormat

---

public final class JSQLType

extends java.lang.Object

implements org.apache.derby.iapi.services.io.Formatable

Type descriptor which wraps all 3 kinds of types supported in Cloudscape's JSQL language: SQL types, Java primitives, Java classes. This interface was originally added to support the serializing of WorkUnit signatures.

---

Field Summary
static byte	BOOLEAN
static byte	BYTE
private  byte	category
static byte	CHAR
static byte	DOUBLE
static byte	FLOAT
static byte	INT
static byte	JAVA_CLASS
static byte	JAVA_PRIMITIVE
private  java.lang.String	javaClassName
static byte	LONG
static byte	NOT_PRIMITIVE
private  byte	primitiveKind
static java.lang.String[]	primitiveNames
static byte	SHORT
private  DataTypeDescriptor	sqlType
static byte	SQLTYPE
private static java.lang.String[]	wrapperClassNames

 

Constructor Summary

JSQLType()           Public 0-arg constructor for Formatable machinery.

JSQLType(byte primitiveKind)           Create a JSQLType for a Java primitive.

JSQLType(DataTypeDescriptor sqlType)           Create a JSQLType from a SQL type.

JSQLType(java.lang.String javaName)           Create a JSQLType given the name of a Java primitive or java class.

 

Method Summary
byte	getCategory()           What kind of type is this:
java.lang.String	getJavaClassName()           If this is a JAVA_CLASS, what is it's name?
private static byte	getPrimitiveID(java.lang.String name)           Translate the name of a java primitive to an id
byte	getPrimitiveKind()           If this is a JAVA_PRIMITIVE, what is its name?
DataTypeDescriptor	getSQLType()           What's our SQLTYPE?
int	getTypeFormatId()           Get the formatID which corresponds to this class.
private static java.lang.String	getWrapperClassName(byte primitive)           Gets the name of the java wrapper class corresponding to a primitive.
private  void	initialize(byte primitiveKind)
private  void	initialize(byte category, DataTypeDescriptor sqlType, java.lang.String javaClassName, byte primitiveKind)           Initialize this JSQL type.
private  void	initialize(DataTypeDescriptor sqlType)
private  void	initialize(java.lang.String javaClassName)
void	readExternal(java.io.ObjectInput in)           This method restores an object's state by reading in the instance data for the object from the passed in stream.
void	writeExternal(java.io.ObjectOutput out)           This method is responsible for writing the instance data of an object to the passed in stream.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

SQLTYPE

public static final byte SQLTYPE

See Also:

Constant Field Values

---

JAVA_CLASS

public static final byte JAVA_CLASS

See Also:

Constant Field Values

---

JAVA_PRIMITIVE

public static final byte JAVA_PRIMITIVE

See Also:

Constant Field Values

---

NOT_PRIMITIVE

public static final byte NOT_PRIMITIVE

See Also:

Constant Field Values

---

BOOLEAN

public static final byte BOOLEAN

See Also:

Constant Field Values

---

CHAR

public static final byte CHAR

See Also:

Constant Field Values

---

BYTE

public static final byte BYTE

See Also:

Constant Field Values

---

SHORT

public static final byte SHORT

See Also:

Constant Field Values

---

INT

public static final byte INT

See Also:

Constant Field Values

---

LONG

public static final byte LONG

See Also:

Constant Field Values

---

FLOAT

public static final byte FLOAT

See Also:

Constant Field Values

---

DOUBLE

public static final byte DOUBLE

See Also:

Constant Field Values

---

wrapperClassNames

private static final java.lang.String[] wrapperClassNames

---

primitiveNames

public static final java.lang.String[] primitiveNames

---

category

private byte category

---

sqlType

private DataTypeDescriptor sqlType

---

javaClassName

private java.lang.String javaClassName

---

primitiveKind

private byte primitiveKind

Constructor Detail

JSQLType

public JSQLType()

Public 0-arg constructor for Formatable machinery.

---

JSQLType

public JSQLType(DataTypeDescriptor sqlType)

Create a JSQLType from a SQL type.

---

JSQLType

public JSQLType(java.lang.String javaName)

Create a JSQLType given the name of a Java primitive or java class.

---

JSQLType

public JSQLType(byte primitiveKind)

Create a JSQLType for a Java primitive.

Method Detail

getCategory

public byte getCategory()

What kind of type is this:

---

getPrimitiveKind

public byte getPrimitiveKind()

If this is a JAVA_PRIMITIVE, what is its name?

---

getJavaClassName

public java.lang.String getJavaClassName()

If this is a JAVA_CLASS, what is it's name?

---

getSQLType

public DataTypeDescriptor getSQLType()

What's our SQLTYPE?

---

getTypeFormatId

public int getTypeFormatId()

Get the formatID which corresponds to this class.

Specified by:

getTypeFormatId in interface org.apache.derby.iapi.services.io.TypedFormat

---

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Description copied from interface: java.io.Externalizable

This method restores an object's state by reading in the instance data for the object from the passed in stream. Note that this stream is not a subclass of InputStream, but rather is a class that implements the ObjectInput interface. That interface provides a mechanism for reading in Java data types from a stream.

Note that this method must be compatible with writeExternal. It must read back the exact same types that were written by that method in the exact order they were written.

If this method needs to read back an object instance, then the class for that object must be found and loaded. If that operation fails, then this method throws a ClassNotFoundException

Specified by:

readExternal in interface java.io.Externalizable

---

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Description copied from interface: java.io.Externalizable

This method is responsible for writing the instance data of an object to the passed in stream. Note that this stream is not a subclass of OutputStream, but rather is a class that implements the ObjectOutput interface. That interface provides a number of methods for writing Java data values to a stream.

Not that the implementation of this method must be coordinated with the implementation of readExternal.

Specified by:

writeExternal in interface java.io.Externalizable

---

initialize

private void initialize(byte primitiveKind)

---

initialize

private void initialize(DataTypeDescriptor sqlType)

---

initialize

private void initialize(java.lang.String javaClassName)

---

initialize

private void initialize(byte category,
                        DataTypeDescriptor sqlType,
                        java.lang.String javaClassName,
                        byte primitiveKind)

Initialize this JSQL type. Minion of all constructors.

---

getWrapperClassName

private static java.lang.String getWrapperClassName(byte primitive)

Gets the name of the java wrapper class corresponding to a primitive.

---

getPrimitiveID

private static byte getPrimitiveID(java.lang.String name)

Translate the name of a java primitive to an id

---

Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> iapi >> [ types overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---