org.mozilla.mentat

Class TxChange

java.lang.Object

com.sun.jna.Structure

org.mozilla.mentat.TxChange

Direct Known Subclasses:

TxChange.ByReference, TxChange.ByValue

public class TxChange
extends com.sun.jna.Structure

Represents a C struct representing changes that occured during a transaction. These changes contain the transaction identifier, a Pointer to a list of affected attribute Entids and the number of items that the list contains.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TxChange.ByReference
static class	TxChange.ByValue

Nested classes/interfaces inherited from class com.sun.jna.Structure

com.sun.jna.Structure.StructField

Field Summary

Fields

Modifier and Type	Field and Description
com.sun.jna.Pointer	changes
long	changes_len
long	txid

Fields inherited from class com.sun.jna.Structure

ALIGN_DEFAULT, ALIGN_GNUC, ALIGN_MSVC, ALIGN_NONE, CALCULATE_SIZE

Constructor Summary

Constructors

Constructor and Description
TxChange()

Method Summary

Modifier and Type	Method and Description
List<Long>	getChanges() Get the affected attributes for this transaction
protected List<String>	getFieldOrder() Return this Structure's field names in their proper order.

Methods inherited from class com.sun.jna.Structure

allocateMemory, allocateMemory, autoAllocate, autoRead, autoRead, autoWrite, autoWrite, cacheTypeInfo, calculateSize, clear, createFieldsOrder, createFieldsOrder, createFieldsOrder, createFieldsOrder, dataEquals, dataEquals, ensureAllocated, equals, fieldOffset, getAutoRead, getAutoWrite, getFieldList, getFields, getNativeAlignment, getNativeSize, getNativeSize, getPointer, getStringEncoding, getStructAlignment, hashCode, newInstance, newInstance, read, readField, readField, setAlignType, setAutoRead, setAutoSynch, setAutoWrite, setFieldOrder, setStringEncoding, size, sortFields, toArray, toArray, toString, toString, useMemory, useMemory, write, writeField, writeField, writeField

Methods inherited from class java.lang.Object

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

Field Detail

txid

public long txid

changes

public com.sun.jna.Pointer changes

changes_len

public long changes_len

Constructor Detail

TxChange

public TxChange()

Method Detail

getChanges

public List<Long> getChanges()

Get the affected attributes for this transaction

Returns:

The changes as a list of Entids of affected attributes

getFieldOrder

protected List<String> getFieldOrder()

Description copied from class: com.sun.jna.Structure

Return this Structure's field names in their proper order. For example,

 protected List getFieldOrder() {
     return Arrays.asList(new String[] { ... });
 }
 

IMPORTANT When deriving from an existing Structure subclass, ensure that you augment the list provided by the superclass, e.g.

 protected List getFieldOrder() {
     List fields = new ArrayList(super.getFieldOrder());
     fields.addAll(Arrays.asList(new String[] { ... }));
     return fields;
 }
 

Field order must be explicitly indicated, since the field order as returned by Class.getFields() is not guaranteed to be predictable.

Specified by:

getFieldOrder in class com.sun.jna.Structure

Returns:

ordered list of field names