jjg@106: 
jjg@106: package com.sun.tools.javac.file;
jjg@106: 
jjg@106: import java.io.File;
jjg@106: import java.io.IOException;
jjg@106: import java.util.ArrayList;
jjg@106: import java.util.Collections;
jjg@106: import java.util.List;
jjg@106: import java.util.StringTokenizer;
jjg@106: import java.util.jar.Attributes;
jjg@106: import java.util.jar.JarFile;
jjg@106: import java.util.jar.Manifest;
jjg@106: 
jjg@106: import com.sun.tools.javac.util.Context;
jjg@106: 
jjg@106: /**
jjg@106:  * Get meta-info about files. Default direct (non-caching) implementation.
jjg@106:  * @see CacheFSInfo
jjg@333:  *
jjg@581:  * <p><b>This is NOT part of any supported API.
jjg@333:  * If you write code that depends on this, you do so at your own risk.
jjg@333:  * This code and its internal interfaces are subject to change or
jjg@333:  * deletion without notice.</b>
jjg@106:  */
jjg@106: public class FSInfo {
jjg@106: 
jjg@106:     /** Get the FSInfo instance for this context.
jjg@106:      *  @param context the context
jjg@106:      *  @return the Paths instance for this context
jjg@106:      */
jjg@106:     public static FSInfo instance(Context context) {
jjg@106:         FSInfo instance = context.get(FSInfo.class);
jjg@106:         if (instance == null)
jjg@106:             instance = new FSInfo();
jjg@106:         return instance;
jjg@106:     }
jjg@106: 
jjg@106:     protected FSInfo() {
jjg@106:     }
jjg@106: 
jjg@106:     protected FSInfo(Context context) {
jjg@106:         context.put(FSInfo.class, this);
jjg@106:     }
jjg@106: 
jjg@106:     public File getCanonicalFile(File file) {
jjg@106:         try {
jjg@106:             return file.getCanonicalFile();
jjg@106:         } catch (IOException e) {
jjg@106:             return file.getAbsoluteFile();
jjg@106:         }
jjg@106:     }
jjg@106: 
jjg@106:     public boolean exists(File file) {
jjg@106:         return file.exists();
jjg@106:     }
jjg@106: 
jjg@106:     public boolean isDirectory(File file) {
jjg@106:         return file.isDirectory();
jjg@106:     }
jjg@106: 
jjg@106:     public boolean isFile(File file) {
jjg@106:         return file.isFile();
jjg@106:     }
jjg@106: 
jjg@106:     public List<File> getJarClassPath(File file) throws IOException {
jjg@106:         String parent = file.getParent();
jjg@106:         JarFile jarFile = new JarFile(file);
jjg@106:         try {
jjg@106:             Manifest man = jarFile.getManifest();
jjg@106:             if (man == null)
jjg@106:                 return Collections.emptyList();
jjg@106: 
jjg@106:             Attributes attr = man.getMainAttributes();
jjg@106:             if (attr == null)
jjg@106:                 return Collections.emptyList();
jjg@106: 
jjg@106:             String path = attr.getValue(Attributes.Name.CLASS_PATH);
jjg@106:             if (path == null)
jjg@106:                 return Collections.emptyList();
jjg@106: 
jjg@106:             List<File> list = new ArrayList<File>();
jjg@106: 
jjg@106:             for (StringTokenizer st = new StringTokenizer(path); st.hasMoreTokens(); ) {
jjg@106:                 String elt = st.nextToken();
jjg@106:                 File f = (parent == null ? new File(elt) : new File(parent, elt));
jjg@106:                 list.add(f);
jjg@106:             }
jjg@106: 
jjg@106:             return list;
jjg@106:         } finally {
jjg@106:             jarFile.close();
jjg@106:         }
jjg@106:     }
jjg@106: }