org.apache.cayenne.access.trans
Class JoinStack
java.lang.Object
org.apache.cayenne.access.trans.JoinStack
public class JoinStack
- extends Object
Encapsulates join reuse/split logic used in SelectQuery processing. All
expression path's that exist in the query (in the qualifier, etc.) are
processed to produce a combined join tree.
- Since:
- 3.0
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
rootNode
protected JoinTreeNode rootNode
topNode
protected JoinTreeNode topNode
JoinStack
protected JoinStack(DbAdapter dbAdapter,
DataMap dataMap,
QueryAssembler assembler)
size
protected int size()
- Returns the number of configured joins.
appendJoins
protected void appendJoins(Appendable out)
throws IOException
- Appends all configured joins to the provided output object.
- Throws:
IOException
appendJoinSubtree
protected void appendJoinSubtree(Appendable out,
JoinTreeNode node)
throws IOException
- Throws:
IOException
appendQualifier
protected void appendQualifier(Appendable out,
boolean firstQualifierElement)
throws IOException
- Append join information to the qualifier - the part after "WHERE".
- Throws:
IOException
newAlias
protected String newAlias()
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