org.eclipse.mat.snapshot
Class OQL

java.lang.Object
  extended by org.eclipse.mat.snapshot.OQL

public final class OQL
extends java.lang.Object

Factory for often-used OQL queries.


Method Summary
static java.lang.String classesByClassLoaderId(int classLoaderId)
          Returns an OQL query string to select all classes loaded by the given class loader.
static java.lang.String classesByPattern(java.util.regex.Pattern pattern, boolean includeSubclasses)
          Returns all classes matching a given regular expression.
static java.lang.String forAddress(long address)
          Select object by its address.
static java.lang.String forObjectId(int objectId)
          Select object by its object id.
static java.lang.String forObjectIds(int[] objectIds)
          Select objects by its ids.
static java.lang.String forObjectsOfClass(IClass clasz)
          All objects of a given class.
static java.lang.String forObjectsOfClass(int classId)
          All objects of a class identified by its id.
static java.lang.String instancesByClassLoaderId(int classLoaderId)
          Returns an OQL query string to select all objects loaded by the given class loader.
static java.lang.String instancesByPattern(java.util.regex.Pattern pattern, boolean includeSubclasses)
          Return all instances of classes matching a given regular expression.
static java.lang.String retainedBy(int objectId)
          Select the retained set of a given object.
static java.lang.String retainedBy(java.lang.String oqlQuery)
          Select the retained set of a given OQL query.
static void union(java.lang.StringBuilder query, java.lang.String other)
          Create a OQL union statement and append it to the query.
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Method Detail

forAddress

public static final java.lang.String forAddress(long address)
Select object by its address.


forObjectId

public static final java.lang.String forObjectId(int objectId)
Select object by its object id.


forObjectIds

public static java.lang.String forObjectIds(int[] objectIds)
Select objects by its ids.


retainedBy

public static final java.lang.String retainedBy(java.lang.String oqlQuery)
Select the retained set of a given OQL query.


retainedBy

public static java.lang.String retainedBy(int objectId)
Select the retained set of a given object.


forObjectsOfClass

public static final java.lang.String forObjectsOfClass(IClass clasz)
All objects of a given class.


forObjectsOfClass

public static final java.lang.String forObjectsOfClass(int classId)
All objects of a class identified by its id.


union

public static void union(java.lang.StringBuilder query,
                         java.lang.String other)
Create a OQL union statement and append it to the query.


instancesByPattern

public static java.lang.String instancesByPattern(java.util.regex.Pattern pattern,
                                                  boolean includeSubclasses)
Return all instances of classes matching a given regular expression.


classesByPattern

public static java.lang.String classesByPattern(java.util.regex.Pattern pattern,
                                                boolean includeSubclasses)
Returns all classes matching a given regular expression.


instancesByClassLoaderId

public static java.lang.String instancesByClassLoaderId(int classLoaderId)
Returns an OQL query string to select all objects loaded by the given class loader.
       select *
       from
       (
            select *
            from java.lang.Class c
            where
                c implements org.eclipse.mat.snapshot.model.IClass
                and c.@classLoaderId = {0}
       )
 

Parameters:
classLoaderId - the object id of the class loader
Returns:
an OQL query selecting all objects loaded by the class loader

classesByClassLoaderId

public static java.lang.String classesByClassLoaderId(int classLoaderId)
Returns an OQL query string to select all classes loaded by the given class loader.
       select *
       from java.lang.Class c
       where
            c implements org.eclipse.mat.snapshot.model.IClass
            and c.@classLoaderId = {0}
 

Parameters:
classLoaderId - the object id of the class loader
Returns:
an OQL query selecting all classes loaded by the class loader