/* * Copyright (c) 1997, 2008, 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. *//* * The Original Code is HAT. The Initial Developer of the * Original Code is Bill Foote, with contributions from others * at JavaSoft/Sun. */package com.sun.tools.hat.internal.model;import java.io.File;import java.io.FileInputStream;import java.io.InputStreamReader;import java.io.Reader;import java.io.BufferedReader;import java.io.IOException;import java.util.Hashtable;/** * This represents a set of data members that should be excluded from the * reachable objects query. * This is useful to exclude observers from the * transitive closure of objects reachable from a given object, allowing * some kind of real determination of the "size" of that object. * * @author Bill Foote */public class ReachableExcludesImpl implements ReachableExcludes { private File excludesFile; private long lastModified; private Hashtable methods; // Hashtable<String, String>, used as a bag /** * Create a new ReachableExcludesImpl over the given file. The file will be * re-read whenever the timestamp changes. */ public ReachableExcludesImpl(File excludesFile) { this.excludesFile = excludesFile; readFile(); } private void readFileIfNeeded() { if (excludesFile.lastModified() != lastModified) { synchronized(this) { if (excludesFile.lastModified() != lastModified) { readFile(); } } } } private void readFile() { long lm = excludesFile.lastModified(); Hashtable<String, String> m = new Hashtable<String, String>(); try { BufferedReader r = new BufferedReader(new InputStreamReader( new FileInputStream(excludesFile))); String method; while ((method = r.readLine()) != null) { m.put(method, method); } lastModified = lm; methods = m; // We want this to be atomic } catch (IOException ex) { System.out.println("Error reading " + excludesFile + ": " + ex); } } /** * @return true iff the given field is on the histlist of excluded * fields. */ public boolean isExcluded(String fieldName) { readFileIfNeeded(); return methods.get(fieldName) != null; }}
/*
* Copyright (c) 1997, 2008, 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.
*/
/*
* The Original Code is HAT. The Initial Developer of the
* Original Code is Bill Foote, with contributions from others
* at JavaSoft/Sun.
*/
package com.sun.tools.hat.internal.model;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.Hashtable;
/**
* This represents a set of data members that should be excluded from the
* reachable objects query.
* This is useful to exclude observers from the
* transitive closure of objects reachable from a given object, allowing
* some kind of real determination of the "size" of that object.
*
* @author Bill Foote
*/
public class ReachableExcludesImpl implements ReachableExcludes {
private File excludesFile;
private long lastModified;
private Hashtable methods; // Hashtable<String, String>, used as a bag
/**
* Create a new ReachableExcludesImpl over the given file. The file will be
* re-read whenever the timestamp changes.
*/
public ReachableExcludesImpl(File excludesFile) {
this.excludesFile = excludesFile;
readFile();
}
private void readFileIfNeeded() {
if (excludesFile.lastModified() != lastModified) {
synchronized(this) {
if (excludesFile.lastModified() != lastModified) {
readFile();
}
}
}
}
private void readFile() {
long lm = excludesFile.lastModified();
Hashtable<String, String> m = new Hashtable<String, String>();
try {
BufferedReader r = new BufferedReader(new InputStreamReader(
new FileInputStream(excludesFile)));
String method;
while ((method = r.readLine()) != null) {
m.put(method, method);
}
lastModified = lm;
methods = m; // We want this to be atomic
} catch (IOException ex) {
System.out.println("Error reading " + excludesFile + ": " + ex);
}
}
/**
* @return true iff the given field is on the histlist of excluded
* fields.
*/
public boolean isExcluded(String fieldName) {
readFileIfNeeded();
return methods.get(fieldName) != null;
}
}