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products/Sources/formale Sprachen/JAVA/Netbeans/java/classfile/test/ (Apache JAVA IDE Version 28^©) Datei vom 3.10.2025 mit Größe 4 kB

Quelle Closure.java Sprache: JAVA

/*
* 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.*;

/**
* Closure:  report all classes which this file references in one
* way or another.  Note: this utility won't find classes which are
* dynamically loaded.
*
* @author Thomas Ball
*/
public class Closure {
    String thisClass;
    Set<String> closure;

    Closure(String spec) {
        thisClass = spec;
    }

    void buildClosure(boolean includeJDK)
      throws IOException {
        if (closure != null)
            return;
        closure = new HashSet<String>();
        Set<String> visited = new HashSet<String>();
        Stack<ClassName> stk = new Stack<ClassName>();
        ClassName thisCN = ClassName.getClassName(thisClass.replace('.', '/'));
        stk.push(thisCN);
        visited.add(thisCN.getExternalName());

        while (!stk.empty()) {
            // Add class to closure.
            ClassName cn = (ClassName)stk.pop();
            InputStream is = findClassStream(cn.getType());
     if (is == null) {
  System.err.println("couldn't find class: " +
                                   cn.getExternalName());
  continue;
     }
            ClassFile cfile = new ClassFile(is);
            closure.add(cfile.getName().getExternalName());

            ConstantPool pool = cfile.getConstantPool();
            Iterator refs = pool.getAllClassNames().iterator();
            while (refs.hasNext()) {
                ClassName cnRef = (ClassName)refs.next();
                String cname = cnRef.getExternalName();
                if (cname.indexOf('[') != -1) {
                    // skip arrays
                } else if (!includeJDK &&
                           (cname.startsWith("java.") ||
                            cname.startsWith("javax.") ||
                            cname.startsWith("sun.") ||
                            cname.startsWith("com.sun.corba") ||
                            cname.startsWith("com.sun.image") ||
                            cname.startsWith("com.sun.java.swing") ||
                            cname.startsWith("com.sun.naming") ||
                            cname.startsWith("com.sun.security"))) {
                    // if directed, skip JDK references
                } else {
                    boolean isNew = visited.add(cname);
                    if (isNew)
                        stk.push(cnRef);
                }
            }
        }
    }

    void dumpClosure(PrintStream out) {
        Iterator iter = new TreeSet(closure).iterator();
        while (iter.hasNext())
            out.println((String)iter.next());
    }

    Iterator dependencies() {
        return closure.iterator();
    }

    private InputStream findClassStream(String className) {
        InputStream is =
            ClassLoader.getSystemClassLoader().getResourceAsStream(className + ".class");
        return is;
    }

    /**
     * An error routine which displays the command line usage
     * before exiting.
     */
    public static void usage() {
        System.err.println(
            "usage: java Closure [-includejdk] [ ...]");
        System.exit(1);
    }

    public static void main(String[] args) {
        if (args.length == 0)
            usage();

        boolean includeJDK = false;
        for (int i = 0; i < args.length; i++) {
            if (args[i].equals("-includejdk"))
                includeJDK = true;
            else if (args[i].charAt(0) == '-')
                usage();
            else {
                try {
                    Closure c = new Closure(args[i]);
                    c.buildClosure(includeJDK);
                    c.dumpClosure(System.out);
                } catch (IOException e) {
                    System.err.println("error accessing \"" + args[i] +
                                       "\": " + e.toString());
                }
            }
        }
    }
}

quality87%

¤ Dauer der Verarbeitung: 0.11 Sekunden (vorverarbeitet) ¤

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