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Class com.sun.jaw.reference.query.Query 

java.lang.Object
   |
   +----com.sun.jaw.reference.query.Query
public class Query
extends Object
This class supports construction of object query constraints. The static methods provided return query expressions that may be used in listing and enumerating managed objects. Individual methods for constructing constraints only allow appropriate types as arguments. Composition of calls can construct arbitrary nestings of constraints.

An example follows:


 QueryExp exp = Query.and(Query.gt(Query.attr("age"), Query.value(5)),
                          Query.match(Query.attr("name"), 
                                      Query.value("G*ling")));

See Also:
AttributeExp, StringValueExp, QueryExp, ValueExp

Variable Index

o DIV
o EQ
o GE
o GT
o LE
o LT
o MINUS
o PLUS
o TIMES

Constructor Index

o Query()

Method Index

o and(QueryExp, QueryExp)
Returns a query expression that is the conjunction of two other query expressions.
o anySubstring(AttributeExp, StringValueExp)
Returns a query expression that represents a matching constraint on a string argument.
o attr(String)
Returns a new attribute expression which can be used in any Query call that expects an AttributeExp or a ValueExp.
o attr(String, int)
Returns a new indexed attribute expression which can be used in any Query call that expects an AttributeExp or a ValueExp.
o attr(String, String)
Returns a new qualified attribute expression which can be used in any Query call that expects an AttributeExp or a ValueExp.
o attr(String, String, int)
Returns a new qualified attribute expression which can be used in any Query call that expects an AttributeExp or a ValueExp.
o between(ValueExp, ValueExp, ValueExp)
Returns a query expression that represents the constraint that one value lies between two other values.
o div(ValueExp, ValueExp)
Return a binary expression representing the quotient of two numeric values.
o eq(ValueExp, ValueExp)
Returns a query expression that represents an equality constraint on two values.
o finalSubstring(AttributeExp, StringValueExp)
Returns a query expression that represents a matching constraint on a string argument.
o geq(ValueExp, ValueExp)
Returns a query expression that represents a "greater than or equal to" constraint on two values.
o getClassVersion()
Returns the version of this class.
o gt(ValueExp, ValueExp)
Returns a query expression that represents a "greater than" constraint on two values.
o in(ValueExp, ValueExp[])
Returns an expression constraining a value to be one of an explicit list.
o initialSubstring(AttributeExp, StringValueExp)
Returns a query expression that represents a matching constraint on a string argument.
o leq(ValueExp, ValueExp)
Returns a query expression that represents a "less than or equal to" constraint on two values.
o lt(ValueExp, ValueExp)
Returns a query expression that represents a "less than" constraint on two values.
o match(AttributeExp, StringValueExp)
Returns a query expression that represents a matching constraint on a string argument.
o minus(ValueExp, ValueExp)
Return a binary expression representing the difference of two numeric values.
o not(QueryExp)
Returns a constraint that is the negation of its argument.
o or(QueryExp, QueryExp)
Returns a query expression that is the disjunction of two other query expressions.
o plus(ValueExp, ValueExp)
Returns a binary expression representing the sum of two numeric values or the concatenation of two string values.
o times(ValueExp, ValueExp)
Return a binary expression representing the product of two value expressions.
o value(boolean)
Returns a boolean value expression that can be used in any Query call that expects a ValueExp.
o value(double)
Returns a numeric value expression that can be used in any Query call that expects a ValueExp.
o value(float)
Returns a numeric value expression that can be used in any Query call that expects a ValueExp.
o value(int)
Returns a numeric value expression that can be used in any Query call that expects a ValueExp.
o value(long)
Returns a numeric value expression that can be used in any Query call that expects a ValueExp.
o value(Number)
Returns a numeric value expression that can be used in any Query call that expects a ValueExp.
o value(String)
Returns a new string expression which can be used in any Query call that expects a StringValueExp or a ValueExp.

Variables

o GT 
 public static final int GT
o LT 
 public static final int LT
o GE 
 public static final int GE
o LE 
 public static final int LE
o EQ 
 public static final int EQ
o PLUS 
 public static final int PLUS
o MINUS 
 public static final int MINUS
o TIMES 
 public static final int TIMES
o DIV 
 public static final int DIV

Constructors

o Query 
 public Query()

Methods

o getClassVersion 
 public String getClassVersion()
Returns the version of this class.

Returns:
a string representation of the version of this class.
o and 
 public static QueryExp and(QueryExp q1,
                            QueryExp q2)
Returns a query expression that is the conjunction of two other query expressions.

Parameters:
q1 - A query expression.
q2 - Another query expression.
Returns:
The conjunction of the two query expressions q1 and q2.
o or 
 public static QueryExp or(QueryExp q1,
                           QueryExp q2)
Returns a query expression that is the disjunction of two other query expressions.

Parameters:
q1 - A query expression.
q2 - Another query expression.
Returns:
The disjunction of the two query expressions q1 and q2.
o gt 
 public static QueryExp gt(ValueExp v1,
                           ValueExp v2)
Returns a query expression that represents a "greater than" constraint on two values.

Parameters:
v1 - A value expression.
v2 - Another value expression.
Returns:
A "greater than" constraint on the two value expressions v1 and v2.
o geq 
 public static QueryExp geq(ValueExp v1,
                            ValueExp v2)
Returns a query expression that represents a "greater than or equal to" constraint on two values.

Parameters:
v1 - A value expression.
v2 - Another value expression.
Returns:
A "greater than or equal to" constraint on the two value expressions v1 and v2.
o leq 
 public static QueryExp leq(ValueExp v1,
                            ValueExp v2)
Returns a query expression that represents a "less than or equal to" constraint on two values.

Parameters:
v1 - A value expression.
v2 - Another value expression.
Returns:
A "less than or equal to" constraint on the two value expressions v1 and v2.
o lt 
 public static QueryExp lt(ValueExp v1,
                           ValueExp v2)
Returns a query expression that represents a "less than" constraint on two values.

Parameters:
v1 - A value expression.
v2 - Another value expression.
Returns:
A "less than" constraint on the two value expressions v1 and v2.
o eq 
 public static QueryExp eq(ValueExp v1,
                           ValueExp v2)
Returns a query expression that represents an equality constraint on two values.

Parameters:
v1 - A value expression.
v2 - Another value expression.
Returns:
An equality constraint on the two value expressions v1 and v2.
o between 
 public static QueryExp between(ValueExp v1,
                                ValueExp v2,
                                ValueExp v3)
Returns a query expression that represents the constraint that one value lies between two other values.

Parameters:
v1 - A value expression.
v2 - Another value expression.
v3 - Another value expression.
Returns:
The constraint that v1 lies between v2 and v3.
o match 
 public static QueryExp match(AttributeExp a1,
                              StringValueExp s)
Returns a query expression that represents a matching constraint on a string argument. The matching syntax is consistent with file globbing:

For example: a*b?c would match any number of as followed by a b, any single character, and a c.

Parameters:
a - An attribute expression.
s - A string value expression representing a matching constraint.
Returns:
The constraint that a matches s.
o initialSubstring 
 public static QueryExp initialSubstring(AttributeExp a1,
                                         StringValueExp s)
Returns a query expression that represents a matching constraint on a string argument. The value must start with the given string value.

Parameters:
a - An attribute expression.
s - A string value expression representing the beginning of the string value.
Returns:
The constraint that a matches s.
o anySubstring 
 public static QueryExp anySubstring(AttributeExp a1,
                                     StringValueExp s)
Returns a query expression that represents a matching constraint on a string argument. The value must contain the given string value.

Parameters:
a - An attribute expression.
s - A string value expression representing the "middle" of the string value.
Returns:
The constraint that a matches s.
o finalSubstring 
 public static QueryExp finalSubstring(AttributeExp a1,
                                       StringValueExp s)
Returns a query expression that represents a matching constraint on a string argument. The value must end with the given string value.

Parameters:
a - An attribute expression.
s - A string value expression representing the end of the string value.
Returns:
The constraint that a matches s.
o attr 
 public static AttributeExp attr(String name)
Returns a new attribute expression which can be used in any Query call that expects an AttributeExp or a ValueExp.

Parameters:
name - The name of the attribute.
Returns:
An attribute expression for the attribute named name.
o attr 
 public static QualifiedAttributeExp attr(String className,
                                          String name)
Returns a new qualified attribute expression which can be used in any Query call that expects an AttributeExp or a ValueExp.

Parameters:
class - The class possessing the attribute.
name - The name of the attribute.
Returns:
An attribute expression for the attribute named name.
o attr 
 public static IndexedAttributeExp attr(String name,
                                        int index)
Returns a new indexed attribute expression which can be used in any Query call that expects an AttributeExp or a ValueExp.

Parameters:
name - The name of the attribute.
Returns:
An attribute expression for the attribute named name.
o attr 
 public static QualifiedIndexedAttributeExp attr(String className,
                                                 String name,
                                                 int index)
Returns a new qualified attribute expression which can be used in any Query call that expects an AttributeExp or a ValueExp.

Parameters:
class - The class possessing the attribute.
name - The name of the attribute.
Returns:
An attribute expression for the attribute named name.
o not 
 public static NotQueryExp not(QueryExp queryExp)
Returns a constraint that is the negation of its argument.

Parameters:
queryExp - The constraint to be negated.
Returns:
A negated constraint.
o in 
 public static InQueryExp in(ValueExp val,
                             ValueExp valueList[])
Returns an expression constraining a value to be one of an explicit list.

Parameters:
val - A value to be constrained.
valueList - An array of ValueExps.
Returns:
An InQueryExp that represents the constraint.
o value 
 public static StringValueExp value(String val)
Returns a new string expression which can be used in any Query call that expects a StringValueExp or a ValueExp.

Parameters:
val - The string value.
Returns:
A StringValueExp object containing the string argument.
o value 
 public static ValueExp value(Number val)
Returns a numeric value expression that can be used in any Query call that expects a ValueExp.

Parameters:
val - An instance of Number.
Returns:
A NumericValue object containing the argument.
o value 
 public static ValueExp value(int val)
Returns a numeric value expression that can be used in any Query call that expects a ValueExp.

Parameters:
val - An integer value.
Returns:
A NumericValue object containing the argument.
o value 
 public static ValueExp value(long val)
Returns a numeric value expression that can be used in any Query call that expects a ValueExp.

Parameters:
val - A long value.
Returns:
A NumericValue object containing the argument.
o value 
 public static ValueExp value(float val)
Returns a numeric value expression that can be used in any Query call that expects a ValueExp.

Parameters:
val - A floating point value.
Returns:
A NumericValue object containing the argument.
o value 
 public static ValueExp value(double val)
Returns a numeric value expression that can be used in any Query call that expects a ValueExp.

Parameters:
val - A double-precision value.
Returns:
A NumericValue object containing the argument.
o value 
 public static ValueExp value(boolean val)
Returns a boolean value expression that can be used in any Query call that expects a ValueExp.

Parameters:
val - A boolean value.
Returns:
A NumericValue object containing the argument.
o plus 
 public static BinaryOpExpression plus(ValueExp value1,
                                       ValueExp value2)
Returns a binary expression representing the sum of two numeric values or the concatenation of two string values.

Parameters:
value1 - An argument to '+'.
value2 - Another argument to '+'.
Returns:
A BinaryOpExpression representing the sum or concatenation.
o times 
 public static BinaryOpExpression times(ValueExp value1,
                                        ValueExp value2)
Return a binary expression representing the product of two value expressions.

Parameters:
value1 - An argument to '*'.
value2 - Another argument to '*'.
Returns:
A BinaryOpExpression representing the product.
o minus 
 public static BinaryOpExpression minus(ValueExp value1,
                                        ValueExp value2)
Return a binary expression representing the difference of two numeric values.

Parameters:
value1 - An argument to '-'.
value2 - Another argument to '-'.
Returns:
A BinaryOpExpression representing the difference.
o div 
 public static BinaryOpExpression div(ValueExp value1,
                                      ValueExp value2)
Return a binary expression representing the quotient of two numeric values.

Parameters:
value1 - An argument to '/'.
value2 - Another argument to '/'.
Returns:
A BinaryOpExpression representing the quotient. 
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