org.apache.cayenne
Class DataRow
java.lang.Object
java.util.AbstractMap<K,V>
java.util.HashMap<java.lang.String,java.lang.Object>
org.apache.cayenne.DataRow
- All Implemented Interfaces:
- java.io.Serializable, java.lang.Cloneable, java.util.Map<java.lang.String,java.lang.Object>
public class DataRow
- extends java.util.HashMap<java.lang.String,java.lang.Object>
DataRow a map that holds values retrieved from the database for a given query row.
DataRows are used to cache raw database data and as a reference point for tracking
DataObject changes.
- Since:
- 1.1
- See Also:
- Serialized Form
Constructor Summary |
DataRow(int initialCapacity)
|
DataRow(java.util.Map<java.lang.String,?> map)
|
Methods inherited from class java.util.HashMap |
clear, clone, containsKey, containsValue, entrySet, get, isEmpty, keySet, put, putAll, remove, size, values |
Methods inherited from class java.util.AbstractMap |
equals, hashCode |
Methods inherited from class java.lang.Object |
finalize, getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface java.util.Map |
equals, hashCode |
version
protected long version
replacesVersion
protected long replacesVersion
entityName
protected java.lang.String entityName
- Since:
- 3.0
DataRow
public DataRow(java.util.Map<java.lang.String,?> map)
DataRow
public DataRow(int initialCapacity)
getVersion
public long getVersion()
getReplacesVersion
public long getReplacesVersion()
setReplacesVersion
public void setReplacesVersion(long replacesVersion)
- Sets the version of DataRow replaced by this one in the store.
applyDiff
public DataRow applyDiff(DataRow diff)
- Builds a new DataRow, merging changes from
diff
parameter with data
contained in this DataRow.
createDiff
public DataRow createDiff(DataRow row)
- Creates a DataRow that contains only the keys that have values that differ between
this object and
row
parameter. Diff values are taken from the
row
parameter. It is assumed that key sets are compatible in both rows
(e.g. they represent snapshots for the same entity). Returns null if no differences
are found.
createTargetObjectId
public ObjectId createTargetObjectId(java.lang.String entityName,
DbRelationship relationship)
- Returns an ObjectId of an object on the other side of the to-one relationship, for
this DataRow representing a source of relationship. Returns null if snapshot FK
columns indicate a null to-one relationship.
toString
public java.lang.String toString()
- Overrides:
toString
in class java.util.AbstractMap<java.lang.String,java.lang.Object>
getEntityName
public java.lang.String getEntityName()
- Since:
- 3.0
setEntityName
public void setEntityName(java.lang.String entityName)
- Since:
- 3.0
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