How to use

ColumnConditions

in

org.apache.cassandra.cql3

public ColumnConditions build()
{
  return new ColumnConditions(this);
}

/**
 * Rebuilds LWT conditions on SuperColumn _value_ column.
 *
 * Conditions have to be changed to correspond the internal representation of SuperColumn value, since it's not
 * a separate column, but a value in a hidden compact value column.
 */
public static Conditions rebuildLWTColumnConditions(Conditions conditions, CFMetaData cfm, WhereClause whereClause)
{
  if (conditions.isEmpty() || conditions.isIfExists() || conditions.isIfNotExists())
    return conditions;
  ColumnConditions.Builder builder = ColumnConditions.newBuilder();
  Collection<ColumnCondition> columnConditions = ((ColumnConditions) conditions).columnConditions();
  Pair<ColumnDefinition, Relation> superColumnKeyRelation = SuperColumnCompatibility.getSuperColumnKeyRelation(whereClause.relations, cfm);
  checkNotNull(superColumnKeyRelation,
         "Lightweight transactions on SuperColumn tables are only supported with supplied SuperColumn key");
  for (ColumnCondition columnCondition : columnConditions)
  {
    checkTrue(cfm.isSuperColumnValueColumn(columnCondition.column),
         "Lightweight transactions are only supported on the value column of SuperColumn tables");
    Term.Raw value = superColumnKeyRelation.right.getValue();
    Term collectionElemnt = value instanceof AbstractMarker.Raw ?
                new Constants.Marker(((AbstractMarker.Raw) value).bindIndex(),
                           superColumnKeyRelation.left) :
                value.prepare(cfm.ksName, superColumnKeyRelation.left);
    builder.add(ColumnCondition.condition(cfm.compactValueColumn(),
                       collectionElemnt,
                       columnCondition.value(), columnCondition.operator));
  }
  return builder.build();
}

/**
 * Returns the column conditions.
 *
 * @param metadata the column family meta data
 * @param boundNames the bound names
 * @return the column conditions.
 */
private ColumnConditions prepareColumnConditions(CFMetaData metadata, VariableSpecifications boundNames)
{
  checkNull(attrs.timestamp, "Cannot provide custom timestamp for conditional updates");
  ColumnConditions.Builder builder = ColumnConditions.newBuilder();
  for (Pair<ColumnDefinition.Raw, ColumnCondition.Raw> entry : conditions)
  {
    ColumnDefinition def = entry.left.prepare(metadata);
    ColumnCondition condition = entry.right.prepare(keyspace(), def, metadata);
    condition.collectMarkerSpecification(boundNames);
    checkFalse(def.isPrimaryKeyColumn(), "PRIMARY KEY column '%s' cannot have IF conditions", def.name);
    builder.add(condition);
  }
  return builder.build();
}

/**
 * Rebuilds LWT conditions on SuperColumn _value_ column.
 *
 * Conditions have to be changed to correspond the internal representation of SuperColumn value, since it's not
 * a separate column, but a value in a hidden compact value column.
 */
public static Conditions rebuildLWTColumnConditions(Conditions conditions, CFMetaData cfm, WhereClause whereClause)
{
  if (conditions.isEmpty() || conditions.isIfExists() || conditions.isIfNotExists())
    return conditions;
  ColumnConditions.Builder builder = ColumnConditions.newBuilder();
  Collection<ColumnCondition> columnConditions = ((ColumnConditions) conditions).columnConditions();
  Pair<ColumnDefinition, Relation> superColumnKeyRelation = SuperColumnCompatibility.getSuperColumnKeyRelation(whereClause.relations, cfm);
  checkNotNull(superColumnKeyRelation,
         "Lightweight transactions on SuperColumn tables are only supported with supplied SuperColumn key");
  for (ColumnCondition columnCondition : columnConditions)
  {
    checkTrue(cfm.isSuperColumnValueColumn(columnCondition.column),
         "Lightweight transactions are only supported on the value column of SuperColumn tables");
    Term.Raw value = superColumnKeyRelation.right.getValue();
    Term collectionElemnt = value instanceof AbstractMarker.Raw ?
                new Constants.Marker(((AbstractMarker.Raw) value).bindIndex(),
                           superColumnKeyRelation.left) :
                value.prepare(cfm.ksName, superColumnKeyRelation.left);
    builder.add(ColumnCondition.condition(cfm.compactValueColumn(),
                       collectionElemnt,
                       columnCondition.value(), columnCondition.operator));
  }
  return builder.build();
}

/**
 * Returns the column conditions.
 *
 * @param metadata the column family meta data
 * @param boundNames the bound names
 * @return the column conditions.
 */
private ColumnConditions prepareColumnConditions(CFMetaData metadata, VariableSpecifications boundNames)
{
  checkNull(attrs.timestamp, "Cannot provide custom timestamp for conditional updates");
  ColumnConditions.Builder builder = ColumnConditions.newBuilder();
  for (Pair<ColumnDefinition.Raw, ColumnCondition.Raw> entry : conditions)
  {
    ColumnDefinition def = entry.left.prepare(metadata);
    ColumnCondition condition = entry.right.prepare(keyspace(), def, metadata);
    condition.collectMarkerSpecification(boundNames);
    checkFalse(def.isPrimaryKeyColumn(), "PRIMARY KEY column '%s' cannot have IF conditions", def.name);
    builder.add(condition);
  }
  return builder.build();
}

/**
 * Rebuilds LWT conditions on SuperColumn _value_ column.
 *
 * Conditions have to be changed to correspond the internal representation of SuperColumn value, since it's not
 * a separate column, but a value in a hidden compact value column.
 */
public static Conditions rebuildLWTColumnConditions(Conditions conditions, CFMetaData cfm, WhereClause whereClause)
{
  if (conditions.isEmpty() || conditions.isIfExists() || conditions.isIfNotExists())
    return conditions;
  ColumnConditions.Builder builder = ColumnConditions.newBuilder();
  Collection<ColumnCondition> columnConditions = ((ColumnConditions) conditions).columnConditions();
  Pair<ColumnDefinition, Relation> superColumnKeyRelation = SuperColumnCompatibility.getSuperColumnKeyRelation(whereClause.relations, cfm);
  checkNotNull(superColumnKeyRelation,
         "Lightweight transactions on SuperColumn tables are only supported with supplied SuperColumn key");
  for (ColumnCondition columnCondition : columnConditions)
  {
    checkTrue(cfm.isSuperColumnValueColumn(columnCondition.column),
         "Lightweight transactions are only supported on the value column of SuperColumn tables");
    Term.Raw value = superColumnKeyRelation.right.getValue();
    Term collectionElemnt = value instanceof AbstractMarker.Raw ?
                new Constants.Marker(((AbstractMarker.Raw) value).bindIndex(),
                           superColumnKeyRelation.left) :
                value.prepare(cfm.ksName, superColumnKeyRelation.left);
    builder.add(ColumnCondition.condition(cfm.compactValueColumn(),
                       collectionElemnt,
                       columnCondition.value(), columnCondition.operator));
  }
  return builder.build();
}

public ColumnConditions build()
{
  return new ColumnConditions(this);
}

/**
 * Returns the column conditions.
 *
 * @param metadata the column family meta data
 * @param boundNames the bound names
 * @return the column conditions.
 */
private ColumnConditions prepareColumnConditions(CFMetaData metadata, VariableSpecifications boundNames)
{
  checkNull(attrs.timestamp, "Cannot provide custom timestamp for conditional updates");
  ColumnConditions.Builder builder = ColumnConditions.newBuilder();
  for (Pair<ColumnDefinition.Raw, ColumnCondition.Raw> entry : conditions)
  {
    ColumnDefinition def = entry.left.prepare(metadata);
    ColumnCondition condition = entry.right.prepare(keyspace(), def, metadata);
    condition.collectMarkerSpecification(boundNames);
    checkFalse(def.isPrimaryKeyColumn(), "PRIMARY KEY column '%s' cannot have IF conditions", def.name);
    builder.add(condition);
  }
  return builder.build();
}

public ColumnConditions build()
{
  return new ColumnConditions(this);
}