forked from openjdk/jdk
/
SystemDictionaryHelper.java
111 lines (98 loc) · 3.94 KB
/
SystemDictionaryHelper.java
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/*
* Copyright (c) 2002, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
package sun.jvm.hotspot.utilities;
import java.util.*;
import sun.jvm.hotspot.classfile.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.memory.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.utilities.Observable;
import sun.jvm.hotspot.utilities.Observer;
public class SystemDictionaryHelper {
static {
VM.registerVMInitializedObserver(new Observer() {
public void update(Observable o, Object data) {
initialize();
}
});
}
private static synchronized void initialize() {
klasses = null;
}
// Instance klass array sorted by name.
private static InstanceKlass[] klasses;
// side-effect!. caches the instance klass array.
public static synchronized InstanceKlass[] getAllInstanceKlasses() {
if (klasses != null) {
return klasses;
}
final Vector<InstanceKlass> tmp = new Vector<>();
ClassLoaderDataGraph cldg = VM.getVM().getClassLoaderDataGraph();
cldg.classesDo(new ClassLoaderDataGraph.ClassVisitor() {
public void visit(Klass k) {
if (k instanceof InstanceKlass) {
InstanceKlass ik = (InstanceKlass) k;
tmp.add(ik);
}
}
});
klasses = tmp.toArray(new InstanceKlass[0]);
Arrays.sort(klasses, new Comparator<>() {
public int compare(InstanceKlass k1, InstanceKlass k2) {
Symbol s1 = k1.getName();
Symbol s2 = k2.getName();
return s1.asString().compareTo(s2.asString());
}
});
return klasses;
}
// returns array of instance klasses whose name contains given namePart
public static InstanceKlass[] findInstanceKlasses(String namePart) {
namePart = namePart.replace('.', '/');
InstanceKlass[] tmpKlasses = getAllInstanceKlasses();
Vector<InstanceKlass> tmp = new Vector<>();
for (int i = 0; i < tmpKlasses.length; i++) {
String name = tmpKlasses[i].getName().asString();
if (name.indexOf(namePart) != -1) {
tmp.add(tmpKlasses[i]);
}
}
InstanceKlass[] searchResult = tmp.toArray(new InstanceKlass[0]);
return searchResult;
}
// find first class whose name matches exactly the given argument.
public static InstanceKlass findInstanceKlass(String className) {
// convert to internal name
className = className.replace('.', '/');
ClassLoaderDataGraph cldg = VM.getVM().getClassLoaderDataGraph();
// check whether we have a class of given name
Klass klass = cldg.find(className);
if (klass != null && klass instanceof InstanceKlass) {
return (InstanceKlass) klass;
} else {
// no match ..
return null;
}
}
}