public FilterItem setQuery(Query query)
{
_query = query;
if (_childItems == null)
{
if (_expression == null)
{
if (_selectItem.getQuery() == null)
{
_selectItem.setQuery(_query);
}
if (_operand is SelectItem)
{
SelectItem operand = (SelectItem)_operand;
if (operand.getQuery() == null)
{
operand.setQuery(_query);
}
}
}
}
else
{
foreach (FilterItem item in _childItems)
{
if (item.getQuery() == null)
{
item.setQuery(_query);
}
}
}
return(this);
}
public _QueryPartProcessor_FindFilterItem_impl_(Query query_arg, List <Object> list_arg, object operand_arg, SelectItem select_item_arg)
{
_query = query_arg;
_list = list_arg;
_operand = operand_arg;
_select_item = select_item_arg;
} // constructor
/**
* Creates a clone of the {@link SelectItem} for use within a cloned
* {@link Query}.
*
* @param clonedQuery
* a new {@link Query} object that represents the clone-to-be of
* a query. It is expected that {@link FromItem}s have already
* been cloned in this {@link Query}.
* @return
*/
public SelectItem clone(Query clonedQuery)
{
SelectItem subQuerySelectItem = (_subQuerySelectItem == null ? null : _subQuerySelectItem.clone());
FromItem fromItem;
if (_fromItem == null)
{
fromItem = null;
}
else if (clonedQuery != null && _query != null)
{
int indexOfFromItem = _query.getFromClause().indexOf(_fromItem);
if (indexOfFromItem != -1)
{
fromItem = clonedQuery.getFromClause().getItem(indexOfFromItem);
}
else
{
fromItem = _fromItem.clone();
}
}
else
{
fromItem = _fromItem.clone();
}
SelectItem s = new SelectItem(_column, fromItem, _function, _functionParameters, _expression,
subQuerySelectItem, _alias, _functionApproximationAllowed);
return(s);
} // clone()
} // toStringNoAlias()
private void appendJoinOnItem(StringBuilder sb, String sideAlias, SelectItem onItem)
{
FromItem fromItem = onItem.getFromItem();
if (fromItem != null && fromItem.getSubQuery() != null && fromItem.getAlias() != null)
{
// there's a corner case scenario where an ON item references a
// subquery being joined. In that case the getSuperQueryAlias()
// method will include the subquery alias.
string super_query_alias = onItem.getSuperQueryAlias();
sb.Append(super_query_alias);
return;
}
if (_join != JoinType.None && _leftSide.getJoin() != JoinType.None)
{
sb.Append(onItem.toSql());
return;
}
if (sideAlias != null)
{
sb.Append(sideAlias);
sb.Append('.');
}
String superQueryAlias = onItem.getSuperQueryAlias();
sb.Append(superQueryAlias);
} // appendJoinOnItem()
} // from()
public Query from(Table leftTable, Table rightTable, JoinType joinType, Column leftOnColumn, Column rightOnColumn)
{
SelectItem[] leftOn = new SelectItem[] { new SelectItem(leftOnColumn) };
SelectItem[] rightOn = new SelectItem[] { new SelectItem(rightOnColumn) };
FromItem fromItem = new FromItem(joinType, new FromItem(leftTable), new FromItem(rightTable), leftOn, rightOn);
return(from(fromItem));
} // from()
} // from()
public Query groupBy(params String[] groupByTokens)
{
foreach (string groupByToken in groupByTokens)
{
SelectItem selectItem = findSelectItem(groupByToken, true);
groupBy(new GroupByItem(selectItem));
}
return(this);
} // groupBy()
} // groupBy()
public Query groupBy(params Column [] columns)
{
foreach (Column column in columns)
{
SelectItem selectItem = (SelectItem) new SelectItem(column).setQuery(this);
_groupByClause.addItem(new GroupByItem(selectItem));
}
return(this);
} // groupBy()
protected object validateOperand(object operand)
{
if (operand is Column)
{
// gracefully convert to a select item.
operand = new SelectItem((Column)operand);
}
return(operand);
}
} // where()
public Query where (Column column, OperatorType operatorType, object operand)
{
SelectItem selectItem = _selectClause.getSelectItem(column);
if (selectItem == null)
{
selectItem = new SelectItem(column);
}
return(where (selectItem, operatorType, operand));
} // where()
} // having()
public Query having(Column column, OperatorType operatorType, object operand)
{
SelectItem selectItem = _selectClause.getSelectItem(column);
if (selectItem == null)
{
selectItem = new SelectItem(column);
}
return(having(new FilterItem(selectItem, operatorType, operand)));
} // having()
} // select()
public Query select(params Column[] columns)
{
foreach (Column column in columns)
{
SelectItem selectItem = new SelectItem(column);
selectItem.setQuery(this);
_selectClause.addItem(selectItem);
}
return(this);
} // select()
} // getCountAllItem()
public static bool isCountAllItem(SelectItem item)
{
if (item != null && item.getFunction() != null &&
item.getFunction().ToString().Equals("COUNT") &&
item.getExpression() == "*")
{
return(true);
}
return(false);
} // isCountAllItem()
} // orderBy()
public Query orderBy(Column column, OrderByItem.Direction direction)
{
SelectItem selectItem = _selectClause.getSelectItem(column);
if (selectItem == null)
{
selectItem = new SelectItem(column);
}
return(orderBy(new OrderByItem(selectItem, direction)));
} // orderBy()
/**
* Private constructor, used for cloning
*/
private FilterItem(SelectItem selectItem, OperatorType operator_arg, object operand, NList <FilterItem> orItems,
string expression, LogicalOperator logicalOperator)
{
_selectItem = selectItem;
_operator = operator_arg;
//_operand = validateOperand(operand);
_childItems = orItems;
_expression = expression;
_logicalOperator = logicalOperator;
} // private constructor
} // select()
protected object createOperand(string token, SelectItem leftSelectItem, bool searchSelectItems)
{
if (token.Equals("NULL", StringComparison.CurrentCultureIgnoreCase))
{
return(null);
}
if (token.StartsWith("'") && token.EndsWith("'") && token.Length > 2)
{
string stringOperand = token.Substring(1, token.Length - 1);
//[J2N] replaceAll <=> Replace
stringOperand = stringOperand.Replace("\\\\'", "'");
return(stringOperand);
}
if (searchSelectItems)
{
SelectItem selectItem = findSelectItem(token, false);
if (selectItem != null)
{
return(selectItem);
}
}
ColumnType expectedColumnType = leftSelectItem.getExpectedColumnType();
object result = null;
if (expectedColumnType == null)
{
// We're assuming number here, but it could also be boolean or a
// time based type. But anyways, this should not happen since
// expected column type should be available.
result = NumberComparator.toNumber(token);
}
else if (expectedColumnType.isBoolean())
{
result = BooleanComparator.toBoolean(token);
}
// else if (expectedColumnType.isTimeBased())
// {
// result = FormatHelper.parseSqlTime(expectedColumnType, token);
// }
// else
// {
// result = NumberComparator.toNumber(token);
// }
// if (result == null)
// {
// // shouldn't happen since only "NULL" is parsed as null.
// throw new QueryParserException("Could not parse operand: " + token);
// }
return(result);
} // createOperand()
public String toStringNoAlias(bool?includeSchemaInColumnPaths)
{
if (_expression != null)
{
return(_expression);
}
StringBuilder sb = new StringBuilder();
if (_table != null)
{
if (_table.getSchema() != null && _table.getSchema().getName() != null)
{
sb.Append(_table.getSchema().getName());
sb.Append('.');
}
sb.Append(_table.getQuotedName());
}
else if (_subQuery != null)
{
sb.Append('(');
sb.Append(_subQuery.toSql(includeSchemaInColumnPaths));
sb.Append(')');
}
else if (_join != JoinType.None)
{
String leftSideAlias = _leftSide.getSameQueryAlias();
String rightSideAlias = _rightSide.getSameQueryAlias();
sb.Append(_leftSide.toSql());
sb.Append(' ');
sb.Append(_join);
sb.Append(" JOIN ");
sb.Append(_rightSide.toSql());
for (int i = 0; i < _leftOn.Length; i++)
{
if (i == 0)
{
sb.Append(" ON ");
}
else
{
sb.Append(" AND ");
}
SelectItem primary = _leftOn[i];
appendJoinOnItem(sb, leftSideAlias, primary);
sb.Append(" = ");
SelectItem foreign = _rightOn[i];
appendJoinOnItem(sb, rightSideAlias, foreign);
}
}
return(sb.ToString());
} // toStringNoAlias()
} // groupBy()
public Query groupBy(params GroupByItem[] items)
{
foreach (GroupByItem item in items)
{
SelectItem selectItem = item.getSelectItem();
if (selectItem != null && selectItem.getQuery() == null)
{
selectItem.setQuery(this);
}
}
_groupByClause.addItems(items);
return(this);
} // groupBy()
/**
* All-arguments constructor
*
* @param column
* @param fromItem
* @param function
* @param functionParameters
* @param expression
* @param subQuerySelectItem
* @param alias
* @param functionApproximationAllowed
*/
private SelectItem(Column column, FromItem fromItem, FunctionType function, object[] functionParameters,
string expression, SelectItem subQuerySelectItem,
string alias, bool functionApproximationAllowed) : base()
{
_column = column;
_fromItem = fromItem;
_function = function;
_functionParameters = functionParameters;
_expression = expression;
_subQuerySelectItem = subQuerySelectItem;
_alias = alias;
_functionApproximationAllowed = functionApproximationAllowed;
} // constructor
} // constructor
/**
* Creates a SelectItem that references another select item in a subquery
*
* @param subQuerySelectItem
* @param subQueryFromItem
* the FromItem that holds the sub-query
*/
public SelectItem(SelectItem subQuerySelectItem, FromItem subQueryFromItem) :
this(null, subQueryFromItem, null, null, null, subQuerySelectItem, null, false)
{
if (subQueryFromItem.getSubQuery() == null)
{
throw new ArgumentException("Only sub-query based FromItems allowed.");
}
if (subQuerySelectItem.getQuery() != null &&
!subQuerySelectItem.getQuery().Equals(subQueryFromItem.getSubQuery()))
{
throw new ArgumentException("The SelectItem must exist in the sub-query");
}
} // constructor
/**
* Constructor for join FROM clauses that join two tables using their
* relationship. The primary table of the relationship will be the left side
* of the join and the foreign table of the relationship will be the right
* side of the join.
*
* @param join
* the join type to use
* @param relationship
* the relationship to use for joining the tables
*/
public FromItem(JoinType join, Relationship relationship)
{
_join = join;
_leftSide = new FromItem(relationship.getPrimaryTable());
Column[] columns = relationship.getPrimaryColumns();
_leftOn = new SelectItem[columns.Length];
for (int i = 0; i < columns.Length; i++)
{
_leftOn[i] = new SelectItem(columns[i]);
}
_rightSide = new FromItem(relationship.getForeignTable());
columns = relationship.getForeignColumns();
_rightOn = new SelectItem[columns.Length];
for (int i = 0; i < columns.Length; i++)
{
_rightOn[i] = new SelectItem(columns[i]);
}
}
/**
* Creates a single filter item based on a SelectItem, an operator and an
* operand.
*
* @param selectItem
* the selectItem to put constraints on, cannot be null
* @param operator
* The operator to use. Can be OperatorType.EQUALS_TO,
* OperatorType.DIFFERENT_FROM,
* OperatorType.GREATER_THAN,OperatorType.LESS_THAN
* OperatorType.GREATER_THAN_OR_EQUAL,
* OperatorType.LESS_THAN_OR_EQUAL
* @param operand
* The operand. Can be a constant like null or a String, a
* Number, a Boolean, a Date, a Time, a DateTime. Or another
* SelectItem
* @throws IllegalArgumentException
* if the SelectItem is null or if the combination of operator
* and operand does not make sense.
*/
public FilterItem(SelectItem selectItem, OperatorType operator_arg, object operand) // throws IllegalArgumentException
: this(selectItem, operator_arg, operand, null, null, LogicalOperator.None)
{
if (_operand == null)
{
require("Can only use EQUALS or DIFFERENT_FROM operator with null-operand",
_operator == OperatorType.DIFFERENT_FROM || _operator == OperatorType.EQUALS_TO);
}
if (_operator == OperatorType.LIKE || _operator == OperatorType.NOT_LIKE)
{
ColumnType type = _selectItem.getColumn().getType();
if (type != null)
{
require("Can only use LIKE operator with strings", type.isLiteral() &&
(_operand is String || _operand is SelectItem));
}
}
require("SelectItem cannot be null", _selectItem != null);
} // constructor
public bool equalsIgnoreAlias(SelectItem that, bool exactColumnCompare)
{
if (that == null)
{
return(false);
}
if (that == this)
{
return(true);
}
EqualsBuilder eb = new EqualsBuilder();
if (exactColumnCompare)
{
eb.append(this._column == that._column);
eb.append(this._fromItem, that._fromItem);
}
else
{
eb.append(this._column, that._column);
}
eb.append(this._function, that._function);
eb.append(this._functionApproximationAllowed, that._functionApproximationAllowed);
eb.append(this._expression, that._expression);
if (_subQuerySelectItem != null)
{
eb.append(_subQuerySelectItem.equalsIgnoreAlias(that._subQuerySelectItem));
}
else
{
if (that._subQuerySelectItem != null)
{
eb.append(false);
}
}
return(eb.isEquals());
} // equalsIgnoreAlias()
} // having()
public Query having(FunctionType function, Column column, OperatorType operatorType, object operand)
{
SelectItem selectItem = new SelectItem(function, column);
return(having(new FilterItem(selectItem, operatorType, operand)));
} // having()
} // having()
public Query select(Column column, FromItem fromItem)
{
SelectItem selectItem = new SelectItem(column, fromItem);
return(select(selectItem));
} // select()
//private string getToStringColumnPrefix(bool includeSchemaInColumnPath)
//{
// StringBuilder sb = new StringBuilder();
// if (_fromItem != null && _fromItem.getAlias() != null)
// {
// sb.Append(_fromItem.getAlias());
// sb.Append('.');
// }
// else
// {
// Table table = _column.getTable();
// string tableLabel;
// if (_query == null)
// {
// tableLabel = null;
// }
// else
// {
// tableLabel = _query.getFromClause().getAlias(table);
// }
// if (table != null)
// {
// if (tableLabel == null)
// {
// tableLabel = table.getQuotedName();
// if (includeSchemaInColumnPath)
// {
// Schema schema = table.getSchema();
// if (schema != null)
// {
// tableLabel = schema.getQuotedName() + "." + tableLabel;
// }
// }
// }
// sb.Append(tableLabel);
// sb.Append('.');
// }
// }
// return sb.ToString();
//} // getToStringColumnPrefix()
public bool equalsIgnoreAlias(SelectItem that)
{
return(equalsIgnoreAlias(that, false));
}
} // select()
public Query where (SelectItem selectItem, OperatorType operatorType, object operand)
{
return(where (new FilterItem(selectItem, operatorType, operand)));
} // where()
public abstract object evaluate(Row row, object[] parameters, SelectItem operandItem);
public Query selectCount()
{
return(select(SelectItem.getCountAllItem()));
}
/**
* Does a "manual" evaluation, useful for CSV data and alike, where queries
* cannot be created.
*/
public bool evaluate(Row row)
{
require("Expression-based filters cannot be manually evaluated", _expression == null);
if (_childItems == null)
{
// Evaluate a single constraint
Object selectItemValue = row.getValue(_selectItem);
Object operandValue = _operand;
if (_operand is SelectItem)
{
SelectItem selectItem = (SelectItem)_operand;
operandValue = row.getValue(selectItem);
}
if (operandValue == null)
{
if (_operator == OperatorType.DIFFERENT_FROM)
{
return(selectItemValue != null);
}
else if (_operator == OperatorType.EQUALS_TO)
{
return(selectItemValue == null);
}
else
{
return(false);
}
}
else if (selectItemValue == null)
{
if (_operator == OperatorType.DIFFERENT_FROM)
{
return(true);
}
else
{
return(false);
}
}
else
{
return(compare(selectItemValue, operandValue));
}
}
else
{
// Evaluate several constraints
if (_logicalOperator == LogicalOperator.AND)
{
// require all results to be true
foreach (FilterItem item in _childItems)
{
bool result = item.evaluate(row);
if (!result)
{
return(false);
}
}
return(true);
}
else
{
// require at least one result to be true
foreach (FilterItem item in _childItems)
{
bool result = item.evaluate(row);
if (result)
{
return(true);
}
}
return(false);
}
}
}
} // _QueryPartProcessor_FindFilterItem_impl_ class
private FilterItem findFilterItem(string expression)
{
string upperExpression = expression.ToUpper();
QueryPartCollectionProcessor collectionProcessor = new QueryPartCollectionProcessor();
new QueryPartParser(collectionProcessor, expression, " AND ", " OR ").parse();
List <String> tokens = collectionProcessor.getTokens();
List <String> delims = collectionProcessor.getDelims();
if (tokens.Count == 1)
{
expression = tokens[0];
upperExpression = expression.ToUpper();
}
else
{
//[J2N] LogicalOperator.valueOf() <=> Enum.Parse(typeof(LogicalOperator), value)
LogicalOperator logicalOperator = (LogicalOperator)Enum.Parse(typeof(LogicalOperator), delims[1].Trim());
NList <FilterItem> filterItems = new NList <FilterItem>();
for (int i = 0; i < tokens.Count; i++)
{
string token = tokens[i];
FilterItem filterItem = findFilterItem(token);
filterItems.Add(filterItem);
}
return(new FilterItem(logicalOperator, filterItems));
}
//[J2Cc] operator identifier (a keyword in C#) => operator_var
OperatorType operator_var = null;
string leftSide = null;
string rightSide;
{
string rightSideCandidate = null;
OperatorType[] operators = OperatorType.BUILT_IN_OPERATORS;
foreach (OperatorType operatorCandidate in operators)
{
string searchStr;
if (operatorCandidate.isSpaceDelimited())
{
searchStr = ' ' + operatorCandidate.toSql() + ' ';
}
else
{
searchStr = operatorCandidate.toSql();
}
int operatorIndex = upperExpression.IndexOf(searchStr);
if (operatorIndex > 0)
{
operator_var = operatorCandidate;
leftSide = expression.Substring(0, operatorIndex).Trim();
rightSideCandidate = expression.Substring(operatorIndex + searchStr.Length).Trim();
break;
}
}
if (operator_var == null)
{
// check special cases for IS NULL and IS NOT NULL
if (expression.EndsWith(" IS NOT NULL"))
{
operator_var = OperatorType.DIFFERENT_FROM;
leftSide = expression.Substring(0, expression.LastIndexOf(" IS NOT NULL")).Trim();
rightSideCandidate = "NULL";
}
else if (expression.EndsWith(" IS NULL"))
{
operator_var = OperatorType.EQUALS_TO;
leftSide = expression.Substring(0, expression.LastIndexOf(" IS NULL")).Trim();
rightSideCandidate = "NULL";
}
}
rightSide = rightSideCandidate;
}
if (operator_var == null)
{
return(new FilterItem(expression));
}
SelectItem selectItem = findSelectItem(leftSide, false);
if (selectItem == null)
{
return(new FilterItem(expression));
}
Object operand = null;
if (operator_var == OperatorType.IN)
{
List <Object> list = new List <Object>();
new QueryPartParser(new _QueryPartProcessor_FindFilterItem_impl_(this, list, operand, selectItem), rightSide, ",").parse();
operand = list;
}
else
{
operand = createOperand(rightSide, selectItem, true);
}
return(new FilterItem(selectItem, operator_var, operand));
} // findFilterItem()
