Query (Java 2 Platform Ent. Ed. v1.4) - Java Platform, Enterprise Edition v1.4 API Specifications

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Java^TM 2 Platform
Ent. Ed. v1.4

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javax.management
Class Query

java.lang.Object
  javax.management.Query

public class Query
extends Object

Constructs query object constraints. The static methods provided return query expressions that may be used in listing and enumerating MBeans. Individual constraint construction methods allow only appropriate types as arguments. Composition of calls can construct arbitrary nestings of constraints, as the following example illustrates:

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

Field Summary

static int DIV
          A code representing the div(javax.management.ValueExp, javax.management.ValueExp) expression.

static int EQ
          A code representing the eq(javax.management.ValueExp, javax.management.ValueExp) query.

static int GE
          A code representing the geq(javax.management.ValueExp, javax.management.ValueExp) query.

static int GT
          A code representing the gt(javax.management.ValueExp, javax.management.ValueExp) query.

static int LE
          A code representing the leq(javax.management.ValueExp, javax.management.ValueExp) query.

static int LT
          A code representing the lt(javax.management.ValueExp, javax.management.ValueExp) query.

static int MINUS
          A code representing the minus(javax.management.ValueExp, javax.management.ValueExp) expression.

static int PLUS
          A code representing the plus(javax.management.ValueExp, javax.management.ValueExp) expression.

static int TIMES
          A code representing the times(javax.management.ValueExp, javax.management.ValueExp) expression.

Constructor Summary

Query()
          Basic constructor.

Method Summary

static QueryExp and(QueryExp q1, QueryExp q2)
          Returns a query expression that is the conjunction of two other query expressions.

static QueryExp anySubString(AttributeValueExp a, StringValueExp s)
          Returns a query expression that represents a matching constraint on a string argument.

static AttributeValueExp attr(String name)
          Returns a new attribute expression.

static AttributeValueExp attr(String className, String name)
          Returns a new qualified attribute expression.

static QueryExp between(ValueExp v1, ValueExp v2, ValueExp v3)
          Returns a query expression that represents the constraint that one value is between two other values.

static AttributeValueExp classattr()
          Returns a new class attribute expression which can be used in any Query call that expects a ValueExp.

static ValueExp div(ValueExp value1, ValueExp value2)
          Returns a binary expression representing the quotient of two numeric values.

static QueryExp eq(ValueExp v1, ValueExp v2)
          Returns a query expression that represents an equality constraint on two values.

static QueryExp finalSubString(AttributeValueExp a, StringValueExp s)
          Returns a query expression that represents a matching constraint on a string argument.

static QueryExp geq(ValueExp v1, ValueExp v2)
          Returns a query expression that represents a "greater than or equal to" constraint on two values.

static QueryExp gt(ValueExp v1, ValueExp v2)
          Returns a query expression that represents a "greater than" constraint on two values.

static QueryExp in(ValueExp val, ValueExp[] valueList)
          Returns an expression constraining a value to be one of an explicit list.

static QueryExp initialSubString(AttributeValueExp a, StringValueExp s)
          Returns a query expression that represents a matching constraint on a string argument.

static QueryExp leq(ValueExp v1, ValueExp v2)
          Returns a query expression that represents a "less than or equal to" constraint on two values.

static QueryExp lt(ValueExp v1, ValueExp v2)
          Returns a query expression that represents a "less than" constraint on two values.

static QueryExp match(AttributeValueExp a, StringValueExp s)
          Returns a query expression that represents a matching constraint on a string argument.

static ValueExp minus(ValueExp value1, ValueExp value2)
          Returns a binary expression representing the difference between two numeric values.

static QueryExp not(QueryExp queryExp)
          Returns a constraint that is the negation of its argument.

static QueryExp or(QueryExp q1, QueryExp q2)
          Returns a query expression that is the disjunction of two other query expressions.

static ValueExp plus(ValueExp value1, ValueExp value2)
          Returns a binary expression representing the sum of two numeric values, or the concatenation of two string values.

static ValueExp times(ValueExp value1, ValueExp value2)
          Returns a binary expression representing the product of two numeric values.

static ValueExp value(boolean val)
          Returns a boolean value expression that can be used in any Query call that expects a ValueExp.

static ValueExp value(double val)
          Returns a numeric value expression that can be used in any Query call that expects a ValueExp.

static ValueExp value(float val)
          Returns a numeric value expression that can be used in any Query call that expects a ValueExp.

static ValueExp value(int val)
          Returns a numeric value expression that can be used in any Query call that expects a ValueExp.

static ValueExp value(long val)
          Returns a numeric value expression that can be used in any Query call that expects a ValueExp.

static ValueExp value(Number val)
          Returns a numeric value expression that can be used in any Query call that expects a ValueExp.

static StringValueExp value(String val)
          Returns a new string expression.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

GT

public static final int GT

A code representing the gt(javax.management.ValueExp, javax.management.ValueExp) query. This is chiefly of interest for the serialized form of queries.

See Also:: Constant Field Values

LT

public static final int LT

A code representing the lt(javax.management.ValueExp, javax.management.ValueExp) query. This is chiefly of interest for the serialized form of queries.

See Also:: Constant Field Values

GE

public static final int GE

A code representing the geq(javax.management.ValueExp, javax.management.ValueExp) query. This is chiefly of interest for the serialized form of queries.

See Also:: Constant Field Values

LE

public static final int LE

A code representing the leq(javax.management.ValueExp, javax.management.ValueExp) query. This is chiefly of interest for the serialized form of queries.

See Also:: Constant Field Values

EQ

public static final int EQ

A code representing the eq(javax.management.ValueExp, javax.management.ValueExp) query. This is chiefly of interest for the serialized form of queries.

See Also:: Constant Field Values

PLUS

public static final int PLUS

A code representing the plus(javax.management.ValueExp, javax.management.ValueExp) expression. This is chiefly of interest for the serialized form of queries.

See Also:: Constant Field Values

MINUS

public static final int MINUS

A code representing the minus(javax.management.ValueExp, javax.management.ValueExp) expression. This is chiefly of interest for the serialized form of queries.

See Also:: Constant Field Values

TIMES

public static final int TIMES

A code representing the times(javax.management.ValueExp, javax.management.ValueExp) expression. This is chiefly of interest for the serialized form of queries.

See Also:: Constant Field Values

DIV

public static final int DIV

A code representing the div(javax.management.ValueExp, javax.management.ValueExp) expression. This is chiefly of interest for the serialized form of queries.

See Also:: Constant Field Values

Constructor Detail

Query

public Query()

Basic constructor.

Method Detail

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 arguments.

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 arguments.

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 arguments.

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 arguments.

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 arguments.

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 arguments.

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:: A "equal to" constraint on the arguments.

between

public static QueryExp between(ValueExp v1,
                               ValueExp v2,
                               ValueExp v3)

Returns a query expression that represents the constraint that one value is between two other values.

Parameters:: v1 - A value expression that is "between" v2 and v3.; v2 - Value expression that represents a boundary of the constraint.; v3 - Value expression that represents a boundary of the constraint.
Returns:: The constraint that v1 lies between v2 and v3.

match

public static QueryExp match(AttributeValueExp a,
                             StringValueExp s)

Returns a query expression that represents a matching constraint on a string argument. The matching syntax is consistent with file globbing: Supports "?", "*", "[", each of which may be escaped with "\"; Character classes may use "!" for negation and "-" for range. (* for any character sequence ? for a single arbitrary character [...] for a character sequence). For example: a*b?c would match a string starting with the character a, followed by any number of characters, 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:: A query expression that represents the matching constraint on the string argument.

attr

public static AttributeValueExp attr(String name)

Returns a new attribute expression.

Evaluating this expression for a given objectName includes performing MBeanServer.getAttribute(objectName, name).

Parameters:: name - The name of the attribute.
Returns:: An attribute expression for the attribute named name.

attr

public static AttributeValueExp attr(String className,
                                     String name)

Returns a new qualified attribute expression.

Evaluating this expression for a given objectName includes performing MBeanServer.getObjectInstance(objectName) and MBeanServer.getAttribute(objectName, name).

Parameters:: className - The name of the class possessing the attribute.; name - The name of the attribute.
Returns:: An attribute expression for the attribute named name.

classattr

public static AttributeValueExp classattr()

Returns a new class attribute expression which can be used in any Query call that expects a ValueExp.

Evaluating this expression for a given objectName includes performing MBeanServer.getObjectInstance(objectName).

Returns:: A class attribute expression.

not

public static QueryExp not(QueryExp queryExp)

Returns a constraint that is the negation of its argument.

Parameters:: queryExp - The constraint to negate.
Returns:: A negated constraint.

in

public static QueryExp 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:: A QueryExp that represents the constraint.

value

public static StringValueExp value(String val)

Returns a new string expression.

Parameters:: val - The string value.
Returns:: A ValueExp object containing the string argument.