/*
* Copyright (c) 1998, 2003, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
package com.sun.tools.example.debug.tty;
import com.sun.jdi.*;
import com.sun.jdi.request.ClassPrepareRequest;
import java.util.StringTokenizer;
class PatternReferenceTypeSpec implements ReferenceTypeSpec {
final String classId;
String stem;
PatternReferenceTypeSpec(String classId) throws ClassNotFoundException {
this.classId = classId;
stem = classId;
if (classId.startsWith("*")) {
stem = stem.substring(1);
} else if (classId.endsWith("*")) {
stem = stem.substring(0, classId.length() - 1);
}
checkClassName(stem);
}
/**
* Is this spec unique or is it a class pattern?
*/
public boolean isUnique() {
return classId.equals(stem);
}
/**
* Does the specified ReferenceType match this spec.
*/
@Override
public boolean matches(ReferenceType refType) {
if (classId.startsWith("*")) {
return refType.name().endsWith(stem);
} else if (classId.endsWith("*")) {
return refType.name().startsWith(stem);
} else {
return refType.name().equals(classId);
}
}
@Override
public ClassPrepareRequest createPrepareRequest() {
ClassPrepareRequest request =
Env.vm().eventRequestManager().createClassPrepareRequest();
request.addClassFilter(classId);
request.addCountFilter(1);
return request;
}
@Override
public int hashCode() {
return classId.hashCode();
}
@Override
public boolean equals(Object obj) {
if (obj instanceof PatternReferenceTypeSpec) {
PatternReferenceTypeSpec spec = (PatternReferenceTypeSpec)obj;
return classId.equals(spec.classId);
} else {
return false;
}
}
private void checkClassName(String className) throws ClassNotFoundException {
// Do stricter checking of class name validity on deferred
// because if the name is invalid, it will
// never match a future loaded class, and we'll be silent
// about it.
StringTokenizer tokenizer = new StringTokenizer(className, ".");
while (tokenizer.hasMoreTokens()) {
String token = tokenizer.nextToken();
// Each dot-separated piece must be a valid identifier
// and the first token can also be "*". (Note that
// numeric class ids are not permitted. They must
// match a loaded class.)
if (!isJavaIdentifier(token)) {
throw new ClassNotFoundException();
}
}
}
private boolean isJavaIdentifier(String s) {
if (s.length() == 0) {
return false;
}
int cp = s.codePointAt(0);
if (! Character.isJavaIdentifierStart(cp)) {
return false;
}
for (int i = Character.charCount(cp); i < s.length(); i += Character.charCount(cp)) {
cp = s.codePointAt(i);
if (! Character.isJavaIdentifierPart(cp)) {
return false;
}
}
return true;
}
@Override
public String toString() {
return classId;
}
}