public RelationshipChainField fieldFor(long nodeId, RelationshipRecord rel) {
if (rel.getFirstNode() == nodeId) {
return first;
} else if (rel.getSecondNode() == nodeId) {
return second;
}
throw new IllegalArgumentException(format("%s does not reference node %d", rel, nodeId));
}
@Override
public boolean visitRelationshipCommand(Command.RelationshipCommand command) throws IOException {
RelationshipRecord record = command.getRecord();
byte flags =
bitFlags(
bitFlag(record.inUse(), Record.IN_USE.byteValue()),
bitFlag(record.isCreated(), Record.CREATED_IN_TX));
channel.put(NeoCommandType.REL_COMMAND);
channel.putLong(record.getId());
channel.put(flags);
if (record.inUse()) {
channel
.putLong(record.getFirstNode())
.putLong(record.getSecondNode())
.putInt(record.getType())
.putLong(record.getFirstPrevRel())
.putLong(record.getFirstNextRel())
.putLong(record.getSecondPrevRel())
.putLong(record.getSecondNextRel())
.putLong(record.getNextProp())
.put(
(byte)
((record.isFirstInFirstChain() ? 1 : 0)
| (record.isFirstInSecondChain() ? 2 : 0)));
} else {
channel.putInt(record.getType());
}
return false;
}
@Override
public boolean visitRelationshipCommand(Command.RelationshipCommand command)
throws IOException {
long id = channel.getLong();
byte inUseFlag = channel.get();
boolean inUse = false;
if ((inUseFlag & Record.IN_USE.byteValue()) == Record.IN_USE.byteValue()) {
inUse = true;
} else if ((inUseFlag & Record.IN_USE.byteValue()) != Record.NOT_IN_USE.byteValue()) {
throw new IOException("Illegal in use flag: " + inUseFlag);
}
RelationshipRecord record;
if (inUse) {
record = new RelationshipRecord(id, channel.getLong(), channel.getLong(), channel.getInt());
record.setInUse(inUse);
record.setFirstPrevRel(channel.getLong());
record.setFirstNextRel(channel.getLong());
record.setSecondPrevRel(channel.getLong());
record.setSecondNextRel(channel.getLong());
record.setNextProp(channel.getLong());
/*
* Logs for version 2.0 do not contain the proper values for the following two flags. Also,
* the defaults won't do, because the pointers for prev in the fist record will not be interpreted
* properly. So we need to set the flags explicitly here.
*
* Note that this leaves the prev field for the first record in the chain having a value of -1,
* which is not correct, as it should contain the relationship count instead. However, we cannot
* determine this value from the contents of the log alone.
*/
record.setFirstInFirstChain(
record.getFirstPrevRel() == Record.NO_PREV_RELATIONSHIP.intValue());
record.setFirstInSecondChain(
record.getSecondPrevRel() == Record.NO_PREV_RELATIONSHIP.intValue());
} else {
record = new RelationshipRecord(id, -1, -1, -1);
record.setInUse(false);
}
command.init(record);
return false;
}
/**
* Keeps track of the given relationship and makes use of it later in {@link #accept(long)} and
* {@link #apply(long, long)}
*
* @param deletedRelationship relationship that has been deleted in this transaction.
*/
public void deleted(RelationshipRecord deletedRelationship) {
nodes.add(deletedRelationship.getFirstNode());
nodes.add(deletedRelationship.getSecondNode());
relationships.put(deletedRelationship.getId(), deletedRelationship);
}