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src/share/classes/com/sun/tools/javac/file/FSInfo.java@2eb010b6cb22 (annotated)

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

Thu, 31 Aug 2017 15:17:03 +0800

author

aoqi

date

Thu, 31 Aug 2017 15:17:03 +0800

changeset 2525

2eb010b6cb22

parent 581

f2fdd52e4e87

parent 0

959103a6100f

permissions

-rw-r--r--

merge

aoqi@0	1
aoqi@0	2	package com.sun.tools.javac.file;
aoqi@0	3
aoqi@0	4	import java.io.File;
aoqi@0	5	import java.io.IOException;
aoqi@0	6	import java.util.ArrayList;
aoqi@0	7	import java.util.Collections;
aoqi@0	8	import java.util.List;
aoqi@0	9	import java.util.StringTokenizer;
aoqi@0	10	import java.util.jar.Attributes;
aoqi@0	11	import java.util.jar.JarFile;
aoqi@0	12	import java.util.jar.Manifest;
aoqi@0	13
aoqi@0	14	import com.sun.tools.javac.util.Context;
aoqi@0	15
aoqi@0	16	/**
aoqi@0	17	* Get meta-info about files. Default direct (non-caching) implementation.
aoqi@0	18	* @see CacheFSInfo
aoqi@0	19	*
aoqi@0	20	* <p><b>This is NOT part of any supported API.
aoqi@0	21	* If you write code that depends on this, you do so at your own risk.
aoqi@0	22	* This code and its internal interfaces are subject to change or
aoqi@0	23	* deletion without notice.</b>
aoqi@0	24	*/
aoqi@0	25	public class FSInfo {
aoqi@0	26
aoqi@0	27	/** Get the FSInfo instance for this context.
aoqi@0	28	* @param context the context
aoqi@0	29	* @return the Paths instance for this context
aoqi@0	30	*/
aoqi@0	31	public static FSInfo instance(Context context) {
aoqi@0	32	FSInfo instance = context.get(FSInfo.class);
aoqi@0	33	if (instance == null)
aoqi@0	34	instance = new FSInfo();
aoqi@0	35	return instance;
aoqi@0	36	}
aoqi@0	37
aoqi@0	38	protected FSInfo() {
aoqi@0	39	}
aoqi@0	40
aoqi@0	41	protected FSInfo(Context context) {
aoqi@0	42	context.put(FSInfo.class, this);
aoqi@0	43	}
aoqi@0	44
aoqi@0	45	public File getCanonicalFile(File file) {
aoqi@0	46	try {
aoqi@0	47	return file.getCanonicalFile();
aoqi@0	48	} catch (IOException e) {
aoqi@0	49	return file.getAbsoluteFile();
aoqi@0	50	}
aoqi@0	51	}
aoqi@0	52
aoqi@0	53	public boolean exists(File file) {
aoqi@0	54	return file.exists();
aoqi@0	55	}
aoqi@0	56
aoqi@0	57	public boolean isDirectory(File file) {
aoqi@0	58	return file.isDirectory();
aoqi@0	59	}
aoqi@0	60
aoqi@0	61	public boolean isFile(File file) {
aoqi@0	62	return file.isFile();
aoqi@0	63	}
aoqi@0	64
aoqi@0	65	public List<File> getJarClassPath(File file) throws IOException {
aoqi@0	66	String parent = file.getParent();
aoqi@0	67	JarFile jarFile = new JarFile(file);
aoqi@0	68	try {
aoqi@0	69	Manifest man = jarFile.getManifest();
aoqi@0	70	if (man == null)
aoqi@0	71	return Collections.emptyList();
aoqi@0	72
aoqi@0	73	Attributes attr = man.getMainAttributes();
aoqi@0	74	if (attr == null)
aoqi@0	75	return Collections.emptyList();
aoqi@0	76
aoqi@0	77	String path = attr.getValue(Attributes.Name.CLASS_PATH);
aoqi@0	78	if (path == null)
aoqi@0	79	return Collections.emptyList();
aoqi@0	80
aoqi@0	81	List<File> list = new ArrayList<File>();
aoqi@0	82
aoqi@0	83	for (StringTokenizer st = new StringTokenizer(path); st.hasMoreTokens(); ) {
aoqi@0	84	String elt = st.nextToken();
aoqi@0	85	File f = (parent == null ? new File(elt) : new File(parent, elt));
aoqi@0	86	list.add(f);
aoqi@0	87	}
aoqi@0	88
aoqi@0	89	return list;
aoqi@0	90	} finally {
aoqi@0	91	jarFile.close();
aoqi@0	92	}
aoqi@0	93	}
aoqi@0	94	}