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src/share/classes/com/sun/tools/javac/file/FSInfo.java@ceaa6549687a (annotated)

src/share/classes/com/sun/tools/javac/file/FSInfo.java

Wed, 03 Sep 2008 10:46:25 -0700

author

jjg

date

Wed, 03 Sep 2008 10:46:25 -0700

changeset 106

ceaa6549687a

child 333

7c2d6da61646

permissions

-rw-r--r--

6743107: clean up use of static caches in file manager
Reviewed-by: mcimadamore

jjg@106	1
jjg@106	2	package com.sun.tools.javac.file;
jjg@106	3
jjg@106	4	import java.io.File;
jjg@106	5	import java.io.IOException;
jjg@106	6	import java.util.ArrayList;
jjg@106	7	import java.util.Collections;
jjg@106	8	import java.util.List;
jjg@106	9	import java.util.StringTokenizer;
jjg@106	10	import java.util.jar.Attributes;
jjg@106	11	import java.util.jar.JarFile;
jjg@106	12	import java.util.jar.Manifest;
jjg@106	13
jjg@106	14	import com.sun.tools.javac.util.Context;
jjg@106	15
jjg@106	16	/**
jjg@106	17	* Get meta-info about files. Default direct (non-caching) implementation.
jjg@106	18	* @see CacheFSInfo
jjg@106	19	*/
jjg@106	20	public class FSInfo {
jjg@106	21
jjg@106	22	/** Get the FSInfo instance for this context.
jjg@106	23	* @param context the context
jjg@106	24	* @return the Paths instance for this context
jjg@106	25	*/
jjg@106	26	public static FSInfo instance(Context context) {
jjg@106	27	FSInfo instance = context.get(FSInfo.class);
jjg@106	28	if (instance == null)
jjg@106	29	instance = new FSInfo();
jjg@106	30	return instance;
jjg@106	31	}
jjg@106	32
jjg@106	33	protected FSInfo() {
jjg@106	34	}
jjg@106	35
jjg@106	36	protected FSInfo(Context context) {
jjg@106	37	context.put(FSInfo.class, this);
jjg@106	38	}
jjg@106	39
jjg@106	40	public File getCanonicalFile(File file) {
jjg@106	41	try {
jjg@106	42	return file.getCanonicalFile();
jjg@106	43	} catch (IOException e) {
jjg@106	44	return file.getAbsoluteFile();
jjg@106	45	}
jjg@106	46	}
jjg@106	47
jjg@106	48	public boolean exists(File file) {
jjg@106	49	return file.exists();
jjg@106	50	}
jjg@106	51
jjg@106	52	public boolean isDirectory(File file) {
jjg@106	53	return file.isDirectory();
jjg@106	54	}
jjg@106	55
jjg@106	56	public boolean isFile(File file) {
jjg@106	57	return file.isFile();
jjg@106	58	}
jjg@106	59
jjg@106	60	public List<File> getJarClassPath(File file) throws IOException {
jjg@106	61	String parent = file.getParent();
jjg@106	62	JarFile jarFile = new JarFile(file);
jjg@106	63	try {
jjg@106	64	Manifest man = jarFile.getManifest();
jjg@106	65	if (man == null)
jjg@106	66	return Collections.emptyList();
jjg@106	67
jjg@106	68	Attributes attr = man.getMainAttributes();
jjg@106	69	if (attr == null)
jjg@106	70	return Collections.emptyList();
jjg@106	71
jjg@106	72	String path = attr.getValue(Attributes.Name.CLASS_PATH);
jjg@106	73	if (path == null)
jjg@106	74	return Collections.emptyList();
jjg@106	75
jjg@106	76	List<File> list = new ArrayList<File>();
jjg@106	77
jjg@106	78	for (StringTokenizer st = new StringTokenizer(path); st.hasMoreTokens(); ) {
jjg@106	79	String elt = st.nextToken();
jjg@106	80	File f = (parent == null ? new File(elt) : new File(parent, elt));
jjg@106	81	list.add(f);
jjg@106	82	}
jjg@106	83
jjg@106	84	return list;
jjg@106	85	} finally {
jjg@106	86	jarFile.close();
jjg@106	87	}
jjg@106	88	}
jjg@106	89	}