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src/share/classes/com/sun/tools/javac/file/FSInfo.java@71f35e4b93a5 (annotated)

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

Wed, 23 Jan 2013 13:27:24 -0800

author

jjg

date

Wed, 23 Jan 2013 13:27:24 -0800

changeset 1521

71f35e4b93a5

parent 581

f2fdd52e4e87

child 2525

2eb010b6cb22

permissions

-rw-r--r--

8006775: JSR 308: Compiler changes in JDK8
Reviewed-by: jjg
Contributed-by: mernst@cs.washington.edu, wmdietl@cs.washington.edu, mpapi@csail.mit.edu, mahmood@notnoop.com

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@333	19	*
jjg@581	20	* <p><b>This is NOT part of any supported API.
jjg@333	21	* If you write code that depends on this, you do so at your own risk.
jjg@333	22	* This code and its internal interfaces are subject to change or
jjg@333	23	* deletion without notice.</b>
jjg@106	24	*/
jjg@106	25	public class FSInfo {
jjg@106	26
jjg@106	27	/** Get the FSInfo instance for this context.
jjg@106	28	* @param context the context
jjg@106	29	* @return the Paths instance for this context
jjg@106	30	*/
jjg@106	31	public static FSInfo instance(Context context) {
jjg@106	32	FSInfo instance = context.get(FSInfo.class);
jjg@106	33	if (instance == null)
jjg@106	34	instance = new FSInfo();
jjg@106	35	return instance;
jjg@106	36	}
jjg@106	37
jjg@106	38	protected FSInfo() {
jjg@106	39	}
jjg@106	40
jjg@106	41	protected FSInfo(Context context) {
jjg@106	42	context.put(FSInfo.class, this);
jjg@106	43	}
jjg@106	44
jjg@106	45	public File getCanonicalFile(File file) {
jjg@106	46	try {
jjg@106	47	return file.getCanonicalFile();
jjg@106	48	} catch (IOException e) {
jjg@106	49	return file.getAbsoluteFile();
jjg@106	50	}
jjg@106	51	}
jjg@106	52
jjg@106	53	public boolean exists(File file) {
jjg@106	54	return file.exists();
jjg@106	55	}
jjg@106	56
jjg@106	57	public boolean isDirectory(File file) {
jjg@106	58	return file.isDirectory();
jjg@106	59	}
jjg@106	60
jjg@106	61	public boolean isFile(File file) {
jjg@106	62	return file.isFile();
jjg@106	63	}
jjg@106	64
jjg@106	65	public List<File> getJarClassPath(File file) throws IOException {
jjg@106	66	String parent = file.getParent();
jjg@106	67	JarFile jarFile = new JarFile(file);
jjg@106	68	try {
jjg@106	69	Manifest man = jarFile.getManifest();
jjg@106	70	if (man == null)
jjg@106	71	return Collections.emptyList();
jjg@106	72
jjg@106	73	Attributes attr = man.getMainAttributes();
jjg@106	74	if (attr == null)
jjg@106	75	return Collections.emptyList();
jjg@106	76
jjg@106	77	String path = attr.getValue(Attributes.Name.CLASS_PATH);
jjg@106	78	if (path == null)
jjg@106	79	return Collections.emptyList();
jjg@106	80
jjg@106	81	List<File> list = new ArrayList<File>();
jjg@106	82
jjg@106	83	for (StringTokenizer st = new StringTokenizer(path); st.hasMoreTokens(); ) {
jjg@106	84	String elt = st.nextToken();
jjg@106	85	File f = (parent == null ? new File(elt) : new File(parent, elt));
jjg@106	86	list.add(f);
jjg@106	87	}
jjg@106	88
jjg@106	89	return list;
jjg@106	90	} finally {
jjg@106	91	jarFile.close();
jjg@106	92	}
jjg@106	93	}
jjg@106	94	}