com.graphaware.tx.event.improved.entity.snapshot

Class EntitySnapshot<T extends org.neo4j.graphdb.Entity>

java.lang.Object

com.graphaware.common.wrapper.BaseEntity

com.graphaware.common.wrapper.BaseEntityWrapper<T>

com.graphaware.tx.event.improved.entity.snapshot.EntitySnapshot<T>

Type Parameters:

T - type of the wrapped entity.

All Implemented Interfaces:

EntityWrapper<T>, Wrapper<T>, org.neo4j.graphdb.Entity, org.neo4j.graphdb.PropertyContainer

Direct Known Subclasses:

NodeSnapshot, RelationshipSnapshot

public abstract class EntitySnapshot<T extends org.neo4j.graphdb.Entity>
extends BaseEntityWrapper<T>
implements org.neo4j.graphdb.Entity

A decorator of a Entity that represents a snapshot of a Entity before a transaction has started. It consults EntityTransactionData wrapped in TransactionDataContainer, before returning information about contained properties in order to provide these as they were before the transactions started. Mutations are preformed as expected but only in the case that the mutated Entity has not been deleted in the transaction. If it has been deleted, an exception is thrown upon mutation.

Field Summary

Fields

Modifier and Type	Field and Description
protected TransactionDataContainer	transactionDataContainer
protected T	wrapped

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	EntitySnapshot(T wrapped, TransactionDataContainer transactionDataContainer) Construct a new snapshot.

Method Summary

Modifier and Type	Method and Description
protected void	checkCanBeMutated() Check whether this entity has not been deleted and can thus be mutated.
Object	getProperty(String key)
Iterable<String>	getPropertyKeys()
T	getWrapped()
boolean	hasProperty(String key)
Object	removeProperty(String key)
void	setProperty(String key, Object value)
protected abstract EntityTransactionData<T>	transactionData() Get data about the transaction relevant for the subclass.

Methods inherited from class com.graphaware.common.wrapper.BaseEntityWrapper

addLabel, createRelationshipTo, delete, equals, getDegree, getDegree, getDegree, getDegree, getEndNode, getGraphDatabase, getId, getLabels, getRelationships, getRelationships, getRelationships, getRelationships, getRelationships, getRelationshipTypes, getStartNode, getType, hashCode, hasLabel, removeLabel, self, wrapNode, wrapRelationship, wrapRelationships

Methods inherited from class com.graphaware.common.wrapper.BaseEntity

getAllProperties, getNodes, getOtherNode, getProperties, getProperty, getSingleRelationship, hasRelationship, hasRelationship, hasRelationship, hasRelationship, hasRelationship, isType, node, relationship

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.neo4j.graphdb.Entity

getId

Methods inherited from interface org.neo4j.graphdb.PropertyContainer

getAllProperties, getGraphDatabase, getProperties, getProperty

Field Detail

wrapped

protected final T extends org.neo4j.graphdb.Entity wrapped

transactionDataContainer

protected final TransactionDataContainer transactionDataContainer

Constructor Detail

EntitySnapshot

protected EntitySnapshot(T wrapped,
                         TransactionDataContainer transactionDataContainer)

Construct a new snapshot.

Parameters:

wrapped - entity.

transactionDataContainer - transaction data container.

Method Detail

getWrapped

public T getWrapped()

Specified by:

getWrapped in interface Wrapper<T extends org.neo4j.graphdb.Entity>

transactionData

protected abstract EntityTransactionData<T> transactionData()

Get data about the transaction relevant for the subclass.

Returns:

transaction data.

hasProperty

public boolean hasProperty(String key)

Specified by:

hasProperty in interface org.neo4j.graphdb.PropertyContainer

Overrides:

hasProperty in class BaseEntityWrapper<T extends org.neo4j.graphdb.Entity>

getProperty

public Object getProperty(String key)

Specified by:

getProperty in interface org.neo4j.graphdb.PropertyContainer

Overrides:

getProperty in class BaseEntityWrapper<T extends org.neo4j.graphdb.Entity>

setProperty

public void setProperty(String key,
                        Object value)

Specified by:

setProperty in interface org.neo4j.graphdb.PropertyContainer

Overrides:

setProperty in class BaseEntityWrapper<T extends org.neo4j.graphdb.Entity>

removeProperty

public Object removeProperty(String key)

Specified by:

removeProperty in interface org.neo4j.graphdb.PropertyContainer

Overrides:

removeProperty in class BaseEntityWrapper<T extends org.neo4j.graphdb.Entity>

checkCanBeMutated

protected void checkCanBeMutated()

Check whether this entity has not been deleted and can thus be mutated. In case the entity can be mutated, nothing happens. In the opposite case, an IllegalStateException exception is thrown.

getPropertyKeys

public Iterable<String> getPropertyKeys()

Specified by:

getPropertyKeys in interface org.neo4j.graphdb.PropertyContainer

Overrides:

getPropertyKeys in class BaseEntityWrapper<T extends org.neo4j.graphdb.Entity>