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/*
* $Header: /cvs/glassfish/appserv-api/src/java/com/sun/appserv/management/util/jmx/ObjectNameQueryImpl.java,v 1.2 2007/05/05 05:31:04 tcfujii Exp $
* $Revision: 1.2 $
* $Date: 2007/05/05 05:31:04 $
*/
package com.sun.appserv.management.util.jmx;
import java.util.Set;
import java.util.HashSet;
import java.util.regex.*;
import java.util.Hashtable;
import java.util.Enumeration;
import java.util.Iterator;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import javax.management.MalformedObjectNameException;
import com.sun.appserv.management.util.misc.EnumerationIterator;
public class ObjectNameQueryImpl implements ObjectNameQuery
{
public
ObjectNameQueryImpl()
{
}
/**
Return true if one (or more) of the properties match the regular expressions
for both name and value. Return false if no property/value combinations match.
A null pattern matches anything.
*/
boolean
match( Hashtable properties, Pattern propertyPattern, Pattern valuePattern )
{
final Iterator keys = new EnumerationIterator( properties.keys() );
boolean matches = false;
while ( keys.hasNext() )
{
final String key = (String)keys.next();
if ( propertyPattern == null || propertyPattern.matcher( key ).matches() )
{
if ( valuePattern == null )
{
matches = true;
break;
}
// see if value matches
final String value = (String)properties.get( key );
if ( valuePattern.matcher( value ).matches() )
{
matches = true;
break;
}
}
}
return( matches );
}
/**
Match all property/value expressions against the ObjectName.
Return true if for each property/value regular expression pair there is at least one
property within the ObjectName whose property name and value match their respective
patterns.
A null regex indicates "match anything".
*/
boolean
matchAll( ObjectName name,
Pattern [] propertyPatterns,
Pattern [] valuePatterns )
{
boolean matches = true;
final Hashtable properties = name.getKeyPropertyList();
for( int i = 0; i < propertyPatterns.length; ++i )
{
if ( ! match( properties, propertyPatterns[ i ], valuePatterns[ i ] ) )
{
matches = false;
break;
}
}
return( matches );
}
/**
Match all property/value expressions against the ObjectName.
Return true if there is at least one property/value regular expression pair that
matches a property/value pair within the ObjectName.
A null regex indicates "match anything".
*/
boolean
matchAny( ObjectName name,
Pattern [] propertyPatterns,
Pattern [] valuePatterns )
{
boolean matches = false;
final Hashtable properties = name.getKeyPropertyList();
for( int i = 0; i < propertyPatterns.length; ++i )
{
if ( match( properties, propertyPatterns[ i ], valuePatterns[ i ] ) )
{
matches = true;
break;
}
}
return( matches );
}
Pattern []
createPatterns( final String [] patternStrings, int numItems )
{
final Pattern [] patterns = new Pattern [ numItems ];
if ( patternStrings == null )
{
for( int i = 0; i < numItems; ++i )
{
patterns[ i ] = null;
}
return( patterns );
}
for( int i = 0; i < numItems; ++i )
{
// consider null to match anything
if ( patternStrings[ i ] == null )
{
patterns[ i ] = null;
}
else
{
patterns[ i ] = Pattern.compile( patternStrings[ i ] );
}
}
return( patterns );
}
private interface Matcher
{
boolean match( ObjectName name, Pattern [] names, Pattern [] values );
}
private class MatchAnyMatcher implements Matcher
{
public MatchAnyMatcher() {}
public boolean
match( ObjectName name, Pattern [] names, Pattern [] values )
{
return( matchAny( name, names, values ) );
}
}
private class MatchAllMatcher implements Matcher
{
public MatchAllMatcher() {}
public boolean
match( ObjectName name, Pattern [] names, Pattern [] values )
{
return( matchAll( name, names, values ) );
}
}
Set<ObjectName>
matchEither(
Matcher matcher,
Set<ObjectName> startingSet,
String [] regexNames,
String [] regexValues )
{
if ( regexNames == null && regexValues == null )
{
// both null => matches entire original set
return( startingSet );
}
final Set<ObjectName> results = new HashSet<ObjectName>();
int numMatches = 0;
if ( regexNames != null )
{
numMatches = regexNames.length;
}
else
{
numMatches = regexValues.length;
}
final Pattern [] namePatterns = createPatterns( regexNames, numMatches );
final Pattern [] valuePatterns = createPatterns( regexValues, numMatches );
for( final ObjectName name : startingSet )
{
if ( matcher.match( name, namePatterns, valuePatterns ) )
{
results.add( name );
}
}
return( results );
}
public Set<ObjectName>
matchAll( Set<ObjectName> startingSet, String [] regexNames, String [] regexValues )
{
return( matchEither( new MatchAllMatcher(), startingSet, regexNames, regexValues ) );
}
public Set<ObjectName>
matchAny( Set<ObjectName> startingSet, String [] regexNames, String [] regexValues )
{
return( matchEither( new MatchAnyMatcher(), startingSet, regexNames, regexValues ) );
}
}