+++ /dev/null
-// Copyright 2000-2005 the Contributors, as shown in the revision logs.
-// Licensed under the GNU General Public License version 2 ("the License").
-// You may not use this file except in compliance with the License.
-
-package org.ibex.core;
-
-import java.io.*;
-import java.util.zip.*;
-import org.ibex.js.*;
-import org.ibex.util.*;
-import org.ibex.plat.*;
-import org.ibex.net.*;
-
-/**
- * Essentiall an InputStream "factory". You can repeatedly ask a
- * Stream for an InputStream, and each InputStream you get back will
- * be totally independent of the others (ie separate stream position
- * and state) although they draw from the same data source.
- */
-public abstract class Stream extends JS.Obj implements JS.Cloneable {
-
- // Public Interface //////////////////////////////////////////////////////////////////////////////
-
- public static InputStream getInputStream(Object js) throws IOException { return ((Stream)((JS)js).unclone()).getInputStream();}
- public static class NotCacheableException extends Exception { }
-
- // streams are "sealed" by default to prevent accidental object leakage
- private Cache getCache = new Cache(100, true);
- protected JS _get(JS key) throws JSExn { return null; }
- public final JS get(JS key) throws JSExn {
- JS ret = (JS)getCache.get(key);
- if (ret == null) getCache.put(key, ret = _get(key));
- return ret;
- }
-
- // Private Interface //////////////////////////////////////////////////////////////////////////////
-
- public abstract InputStream getInputStream() throws IOException;
- protected String getCacheKey() throws NotCacheableException { throw new NotCacheableException(); }
-
- /** HTTP or HTTPS resource */
- public static class HTTP extends Stream {
- private String url;
- //public String toString() { return "Stream.HTTP:" + url; }
- public HTTP(String url) { while (url.endsWith("/")) url = url.substring(0, url.length() - 1); this.url = url; }
- public JS _get(JS key) throws JSExn { return new HTTP(url + "/" + JSU.toString(key)); }
- public String getCacheKey(Vec path) throws NotCacheableException { return url; }
- public InputStream getInputStream() throws IOException { return new org.ibex.net.HTTP(url).GET(null, null); }
- }
-
- /** byte arrays */
- public static class ByteArray extends Stream {
- private byte[] bytes;
- private String cacheKey;
- public ByteArray(byte[] bytes, String cacheKey) { this.bytes = bytes; this.cacheKey = cacheKey; }
- public String getCacheKey() throws NotCacheableException {
- if (cacheKey == null) throw new NotCacheableException(); return cacheKey; }
- public InputStream getInputStream() throws IOException { return new ByteArrayInputStream(bytes); }
- }
-
- /** a file */
- public static class File extends Stream {
- private String path;
- public File(String path) { this.path = path; }
- //public String toString() { return "file:" + path; }
- public String getCacheKey() throws NotCacheableException { throw new NotCacheableException(); /* already on disk */ }
- public InputStream getInputStream() throws IOException { return new FileInputStream(path); }
- public JS _get(JS key) throws JSExn {
- System.out.println("get: " + JSU.str(key));
- return new File(path + java.io.File.separatorChar + JSU.toString(key)); }
- }
-
- /** "unwrap" a Zip archive */
- public static class Zip extends Stream {
- private Stream parent;
- private String path;
- public Zip(Stream parent) { this(parent, null); }
- public Zip(Stream parent, String path) {
- while(path != null && path.startsWith("/")) path = path.substring(1);
- this.parent = parent;
- this.path = path;
- }
- public String getCacheKey() throws NotCacheableException { return parent.getCacheKey() + "!zip:"; }
- public JS _get(JS key) throws JSExn { return new Zip(parent, path==null?JSU.toString(key):path+'/'+JSU.toString(key)); }
- public InputStream getInputStream() throws IOException {
- InputStream pis = parent.getInputStream();
- ZipInputStream zis = new ZipInputStream(pis);
- ZipEntry ze = zis.getNextEntry();
- while(ze != null && !ze.getName().equals(path)) ze = zis.getNextEntry();
- if (ze == null) throw new IOException("requested file (" + path + ") not found in archive");
- return new KnownLength.KnownLengthInputStream(zis, (int)ze.getSize());
- }
- }
-
- /** "unwrap" a Cab archive */
- /*
- public static class Cab extends Stream {
- private Stream parent;
- private String path;
- public Cab(Stream parent) { this(parent, null); }
- public Cab(Stream parent, String path) { this.parent = parent; this.path = path; }
- public String getCacheKey() throws NotCacheableException { return parent.getCacheKey() + "!cab:"; }
- public JS _get(JS key) throws JSExn { return new Cab(parent, path==null?(String)key:path+'/'+(String)key); }
- public InputStream getInputStream() throws IOException { return new MSPack(parent.getInputStream()).getInputStream(path); }
- }
- */
-
- /** the Builtin resource */
- public static class Builtin extends Stream {
- public String getCacheKey() throws NotCacheableException { throw new NotCacheableException(); }
- public InputStream getInputStream() throws IOException { return Platform.getBuiltinInputStream(); }
- }
-
- /** the Builtin resource */
- public static class FromInputStream extends Stream {
- private final InputStream is;
- public FromInputStream(InputStream is) { this.is = is; }
- public String getCacheKey() throws NotCacheableException { throw new NotCacheableException(); }
- public InputStream getInputStream() throws IOException { return is; }
- }
-
- /** shadow resource which replaces the graft */
- public static class ProgressWatcher extends Stream {
- private final JS[] callargs = new JS[2];
- final Stream watchee;
- JS callback;
- public ProgressWatcher(Stream watchee, JS callback) { this.watchee = watchee; this.callback = callback; }
- public String getCacheKey() throws NotCacheableException { return watchee.getCacheKey(); }
- public InputStream getInputStream() throws IOException {
- final InputStream is = watchee.getInputStream();
- return new FilterInputStream(is) {
- int bytesDownloaded = 0;
- public int read() throws IOException {
- int ret = super.read();
- if (ret != -1) bytesDownloaded++;
- return ret;
- }
- public int read(byte[] b, int off, int len) throws IOException {
- int ret = super.read(b, off, len);
- if (ret != 1) bytesDownloaded += ret;
- Scheduler.add(new Callable() {
- public Object run(Object o) throws IOException, JSExn {
- try {
- int len = is instanceof KnownLength.KnownLengthInputStream ?
- ((KnownLength.KnownLengthInputStream)is).getLength() : 0;
- callargs[0] = JSU.N(bytesDownloaded);
- callargs[1] = JSU.N(len);
- callback.call(null, callargs);
- } finally { callargs[0] = callargs[1] = null; }
- return null;
- } });
- return ret;
- }
- };
- }
- }
-
- /** subclass from this if you want a CachedInputStream for each path */
- public static class CachedStream extends Stream {
- private Stream parent;
- private boolean disk = false;
- private String key;
- public String getCacheKey() throws NotCacheableException { return key; }
- CachedInputStream cis = null;
- public CachedStream(Stream p, String s, boolean d) throws NotCacheableException {
- this.parent = p; this.disk = d; this.key = p.getCacheKey();
- }
- public InputStream getInputStream() throws IOException {
- if (cis != null) return cis.getInputStream();
- if (!disk) {
- cis = new CachedInputStream(parent.getInputStream());
- } else {
- java.io.File f = org.ibex.core.LocalStorage.Cache.getCacheFileForKey(key);
- if (f.exists()) return new FileInputStream(f);
- cis = new CachedInputStream(parent.getInputStream(), f);
- }
- return cis.getInputStream();
- }
- }
-}
projects / org.ibex.core.git / blobdiff