com.goldencode.p2j.util

Class ExportField

java.lang.Object

com.goldencode.p2j.util.FieldEntry

com.goldencode.p2j.util.ExportField

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable

public class ExportField
extends FieldEntry

Handles export formatted output of data fields for I/O helpers.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.function.Supplier<BaseDataType>	data The data to output to the stream.
private static java.lang.String	jvmPId The PID associated with current JVM instance.
private static java.util.concurrent.atomic.AtomicLong	nextFSId Unique number for next LOB related file export operation.
private BaseDataType	savedVar Resolved variable value.

Constructor Summary

Constructors

Constructor and Description
ExportField() Default constructor which is necessary to restores instance when it is transferred via the network.
ExportField(BaseDataType val) Generate output formatted using the toStringExport method of the associated type.
ExportField(boolean val) Generate output formatted using the toStringExport method of the associated type.
ExportField(double val) Generate output formatted using the toStringExport method of the associated type.
ExportField(int val) Generate output formatted using the toStringExport method of the associated type.
ExportField(Resolvable val) Generate output formatted using the toStringExport method of the associated type.
ExportField(java.lang.String val) Generate output formatted using the toStringExport method of the associated type.
ExportField(java.util.function.Supplier<BaseDataType> val) Generate output formatted using the toStringExport method of the associated type.

Method Summary

Modifier and Type	Method and Description
static java.lang.String	getJavaPId() Gets the current process ID for data exporting process.
static long	getNextFSId() Gets the next unique integer number per JVM running instance to be used in file name reconstruction.
void	output(Stream out) Renders the contained field definition to the given stream.
void	readExternal(java.io.ObjectInput in) Replacement for the default object reading method.
void	resolveData() Notify instance that it is about to be transferred so all resolvable data should be resolved and prepared for sending via network.
void	writeExternal(java.io.ObjectOutput out) Replacement for the default object writing method.

Methods inherited from class com.goldencode.p2j.util.FieldEntry

toArray

Methods inherited from class java.lang.Object

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

Field Detail

nextFSId

private static java.util.concurrent.atomic.AtomicLong nextFSId

Unique number for next LOB related file export operation.

jvmPId

private static final java.lang.String jvmPId

The PID associated with current JVM instance.

data

private java.util.function.Supplier<BaseDataType> data

The data to output to the stream.

savedVar

private BaseDataType savedVar

Resolved variable value.

Constructor Detail

ExportField

public ExportField()

Default constructor which is necessary to restores instance when it is transferred via the network.

ExportField

public ExportField(int val)

Generate output formatted using the toStringExport method of the associated type.

Parameters:

val - The value to be output.

ExportField

public ExportField(double val)

Generate output formatted using the toStringExport method of the associated type.

Parameters:

val - The value to be output.

ExportField

public ExportField(boolean val)

Generate output formatted using the toStringExport method of the associated type.

Parameters:

val - The value to be output.

ExportField

public ExportField(java.lang.String val)

Generate output formatted using the toStringExport method of the associated type.

Parameters:

val - The value to be output.

ExportField

public ExportField(BaseDataType val)

Generate output formatted using the toStringExport method of the associated type.

Parameters:

val - The value to be output.

ExportField

public ExportField(Resolvable val)

Generate output formatted using the toStringExport method of the associated type. This form is used for field references.

Parameters:

val - The value to be output.

ExportField

public ExportField(java.util.function.Supplier<BaseDataType> val)

Generate output formatted using the toStringExport method of the associated type. This form is used for complex expressions whose evaluation bmust be deferred.

Parameters:

val - The function which supplies the value to be output.

Method Detail

output

public void output(Stream out)
            throws ErrorConditionException

Renders the contained field definition to the given stream.

Specified by:

output in class FieldEntry

Parameters:

out - The stream to which the field should be rendered.

Throws:

ErrorConditionException

resolveData

public void resolveData()

Notify instance that it is about to be transferred so all resolvable data should be resolved and prepared for sending via network.

Specified by:

resolveData in class FieldEntry

readExternal

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

Replacement for the default object reading method. The latest state is read from the input source.

Parameters:

in - The input source from which fields will be restored.

Throws:

java.io.IOException - In case of I/O errors.

java.lang.ClassNotFoundException - If payload can't be instantiated.

writeExternal

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

Replacement for the default object writing method. The latest state is written to the output destination.

Parameters:

out - The output destination to which fields will be saved.

Throws:

java.io.IOException - In case of I/O errors.

getNextFSId

public static long getNextFSId()

Gets the next unique integer number per JVM running instance to be used in file name reconstruction.

Returns:

The next number for separate export operation into file system.

getJavaPId

public static java.lang.String getJavaPId()

Gets the current process ID for data exporting process.

Returns:

The current process ID as string value.