/*
* Licensed to the Apache Software Foundation ( ASF ) under one
* or more contributor license agreements . See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership . The ASF licenses this file
* to you under the Apache License , Version 2 . 0 ( the
* " License " ) ; you may not use this file except in compliance
* with the License . You may obtain a copy of the License at
*
* http : //www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing ,
* software distributed under the License is distributed on an
* " AS IS " BASIS , WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND , either express or implied . See the License for the
* specific language governing permissions and limitations
* under the License .
*/
/*
* Contributor ( s ) : Thomas Ball
*/
import org.netbeans.modules.classfile.*;
import java.io.*;
import java.util.*;
import java.util.zip.ZipFile;
import java.util.zip.ZipEntry;
/**
* ScanJar : load all of the classes of a specified jar file ,
* useful for performance and regression testing .
*
* @ author Thomas Ball
*/
public class ScanJar {
String jarName;
boolean includeCode;
boolean toString;
public static void main(String[] args) {
boolean includeCode = false ;
boolean toString = false ;
if (args.length == 0 )
usage();
for (int i = 0 ; i < args.length; i++) {
if (args[i].equals("-includeCode" ))
includeCode = true ;
else if (args[i].equals("-toString" ))
toString = true ;
else if (args[i].charAt(0 ) == '-' )
usage();
else {
try {
ScanJar sj = new ScanJar(args[i], includeCode, toString);
System.out.print("scanning " + args[i]);
if (includeCode || toString) {
System.out.print(": " );
if (includeCode)
System.out.print("includeCode " );
if (toString)
System.out.print("toString" );
}
System.out.println();
ElapsedTimer timer = new ElapsedTimer();
int n = sj.scan();
System.out.println("scanned " + n + " files in " +
timer.toString());
} catch (IOException e) {
System.err.println("error accessing \" " + args[i] +
"\" : " + e.toString());
}
}
}
}
ScanJar(String name, boolean incl, boolean tos) {
jarName = name;
includeCode = incl;
toString = tos;
}
/**
* Reads class entries from the jar file into ClassFile instances .
* Returns the number of classes scanned .
*/
public int scan() throws IOException {
int n = 0 ;
ZipFile zf = new ZipFile(jarName);
Enumeration files = zf.entries();
while (files.hasMoreElements()) {
ZipEntry entry = (ZipEntry)files.nextElement();
String name = entry.getName();
if (name.endsWith(".class" )) {
InputStream in = zf.getInputStream(entry);
ClassFile cf = new ClassFile(in, includeCode);
if (toString)
try {
cf.toString(); // forces loading of attributes.
} catch (InvalidClassFileAttributeException ex) {
System.out.println("error accessing " + name);
throw ex;
}
in.close();
n++;
}
}
zf.close();
return n;
}
public static void usage() {
System.err.println("usage: java ScanJar [-includeCode] " +
"[-toString] <jar file> [ <jar file> ...]" );
System.exit(1 );
}
}
Messung V0.5 in Prozent C=100 H=100 G=100
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-06-10)
¤
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