aoqi@0: 
aoqi@0: package com.sun.tools.javac.file;
aoqi@0: 
aoqi@0: import java.io.File;
aoqi@0: import java.io.IOException;
aoqi@0: import java.util.ArrayList;
aoqi@0: import java.util.Collections;
aoqi@0: import java.util.List;
aoqi@0: import java.util.StringTokenizer;
aoqi@0: import java.util.jar.Attributes;
aoqi@0: import java.util.jar.JarFile;
aoqi@0: import java.util.jar.Manifest;
aoqi@0: 
aoqi@0: import com.sun.tools.javac.util.Context;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * Get meta-info about files. Default direct (non-caching) implementation.
aoqi@0:  * @see CacheFSInfo
aoqi@0:  *
aoqi@0:  * <p><b>This is NOT part of any supported API.
aoqi@0:  * If you write code that depends on this, you do so at your own risk.
aoqi@0:  * This code and its internal interfaces are subject to change or
aoqi@0:  * deletion without notice.</b>
aoqi@0:  */
aoqi@0: public class FSInfo {
aoqi@0: 
aoqi@0:     /** Get the FSInfo instance for this context.
aoqi@0:      *  @param context the context
aoqi@0:      *  @return the Paths instance for this context
aoqi@0:      */
aoqi@0:     public static FSInfo instance(Context context) {
aoqi@0:         FSInfo instance = context.get(FSInfo.class);
aoqi@0:         if (instance == null)
aoqi@0:             instance = new FSInfo();
aoqi@0:         return instance;
aoqi@0:     }
aoqi@0: 
aoqi@0:     protected FSInfo() {
aoqi@0:     }
aoqi@0: 
aoqi@0:     protected FSInfo(Context context) {
aoqi@0:         context.put(FSInfo.class, this);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public File getCanonicalFile(File file) {
aoqi@0:         try {
aoqi@0:             return file.getCanonicalFile();
aoqi@0:         } catch (IOException e) {
aoqi@0:             return file.getAbsoluteFile();
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     public boolean exists(File file) {
aoqi@0:         return file.exists();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public boolean isDirectory(File file) {
aoqi@0:         return file.isDirectory();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public boolean isFile(File file) {
aoqi@0:         return file.isFile();
aoqi@0:     }
aoqi@0: 
aoqi@0:     public List<File> getJarClassPath(File file) throws IOException {
aoqi@0:         String parent = file.getParent();
aoqi@0:         JarFile jarFile = new JarFile(file);
aoqi@0:         try {
aoqi@0:             Manifest man = jarFile.getManifest();
aoqi@0:             if (man == null)
aoqi@0:                 return Collections.emptyList();
aoqi@0: 
aoqi@0:             Attributes attr = man.getMainAttributes();
aoqi@0:             if (attr == null)
aoqi@0:                 return Collections.emptyList();
aoqi@0: 
aoqi@0:             String path = attr.getValue(Attributes.Name.CLASS_PATH);
aoqi@0:             if (path == null)
aoqi@0:                 return Collections.emptyList();
aoqi@0: 
aoqi@0:             List<File> list = new ArrayList<File>();
aoqi@0: 
aoqi@0:             for (StringTokenizer st = new StringTokenizer(path); st.hasMoreTokens(); ) {
aoqi@0:                 String elt = st.nextToken();
aoqi@0:                 File f = (parent == null ? new File(elt) : new File(parent, elt));
aoqi@0:                 list.add(f);
aoqi@0:             }
aoqi@0: 
aoqi@0:             return list;
aoqi@0:         } finally {
aoqi@0:             jarFile.close();
aoqi@0:         }
aoqi@0:     }
aoqi@0: }