+++ /dev/null
-// FIXEME
-// Copyright 2003 Adam Megacz, see the COPYING file for licensing [GPL]
-package org.xwt;
-
-import java.io.*;
-import java.util.*;
-import java.util.zip.*;
-import org.xwt.js.*;
-import org.xwt.util.*;
-import org.bouncycastle.util.encoders.Base64;
-
-
-/** Base class for XWT resources */
-public abstract class Res extends JS {
-
- /** return a resource for a given url */
- public static final Res fromURL(String url) throws JSExn {
- if (url.startsWith("http://")) return new Res.HTTP(url);
- else if (url.startsWith("https://")) return new Res.HTTP(url);
- else if (url.startsWith("data:")) return new Res.ByteArray(Base64.decode(url.substring(5)), null);
- else if (url.startsWith("utf8:")) return new Res.ByteArray(url.substring(5).getBytes(), null);
- throw new JSExn("invalid resource specifier " + url);
- }
-
- // Base Class //////////////////////////////////////////////////////////////////////
-
- public String typeName() { return "resource"; }
-
- /** so that we get the same subresource each time */
- private Hash refCache = null;
-
- public Template t = null;
-
- public final InputStream getInputStream() throws IOException { return getInputStream(""); }
- public abstract InputStream getInputStream(String path) throws IOException;
-
- public Res addExtension(String extension) { return new Ref(this, extension); }
-
- public Object get(Object key) throws JSExn {
- if ("".equals(key)) {
- try {
- Template t = Template.getTemplate(addExtension(".xwt"));
- return t == null ? null : t.getStatic(null); /** FIXME VERY BAD! */
- } catch (Exception e) {
- Log.info(this, e);
- return null;
- }
- }
- Object ret = refCache == null ? null : refCache.get(key);
- if (ret != null) return ret;
- ret = new Ref(this, key);
- if (refCache == null) refCache = new Hash();
- refCache.put(key, ret);
- return ret;
- }
-
-
-
- // Caching //////////////////////////////////////////////////////////////////////
-
- public static class NotCacheableException extends Exception { }
- public static NotCacheableException notCacheable = new NotCacheableException();
-
- /** if it makes sense to cache a resource, the resource must return a unique key */
- public String getCacheKey() throws NotCacheableException { throw notCacheable; }
-
- /** subclass from this if you want a CachedInputStream for each path */
- public static class CachedRes extends Res {
- private Res parent;
- private boolean disk = false;
- private String key;
- public String getCacheKey() throws NotCacheableException { return key; }
- public String toString() { return key; }
- private Hash cachedInputStreams = new Hash();
- public CachedRes(Res p, String s, boolean d) throws NotCacheableException {
- this.parent = p; this.disk = d; this.key = p.getCacheKey();
- }
- public InputStream getInputStream(String path) throws IOException {
- CachedInputStream cis = (CachedInputStream)cachedInputStreams.get(path);
- if (cis == null) {
- if (disk) {
- java.io.File f = LocalStorage.Cache.getCacheFileForKey(key);
- if (f.exists()) return new FileInputStream(f);
- cis = new CachedInputStream(parent.getInputStream(path), f);
- } else {
- cis = new CachedInputStream(parent.getInputStream(path));
- }
- cachedInputStreams.put(path, cis);
- }
- return cis.getInputStream();
- }
- }
-
-
- // Useful Subclasses //////////////////////////////////////////////////////////////////////
-
- /** HTTP or HTTPS resource */
- public static class HTTP extends Res {
- private String url;
- HTTP(String url) { while (url.endsWith("/")) url = url.substring(0, url.length() - 1); this.url = url; }
- public String toString() { return url; }
- public String getCacheKey() throws NotCacheableException { return url; }
- public InputStream getInputStream(String path) throws IOException { return new org.xwt.HTTP(url + path).GET(); }
- }
-
- /** byte arrays */
- public static class ByteArray extends Res {
- private byte[] bytes;
- private String cacheKey = null;
- ByteArray(byte[] bytes, String cacheKey) { this.bytes = bytes; this.cacheKey = cacheKey; }
- public String toString() { return "byte[]"; }
- public String getCacheKey() throws NotCacheableException { return cacheKey; }
- public InputStream getInputStream(String path) throws IOException {
- if (!"".equals(path)) throw new IOException("can't get subresources of a byte[] resource");
- return new ByteArrayInputStream(bytes);
- }
- }
-
- /** a file */
- public static class File extends Res {
- private String path;
- File(String path) {
- while (path.endsWith(java.io.File.separatorChar + "")) path = path.substring(0, path.length() - 1);
- this.path = path;
- }
- public String toString() { return "file:" + path; }
- public String getCacheKey() throws NotCacheableException { throw notCacheable; } // already on the disk!
- public InputStream getInputStream(String rest) throws IOException {
- return new FileInputStream((path + rest).replace('/', java.io.File.separatorChar)); }
- }
-
- /** "unwrap" a Zip archive */
- public static class Zip extends Res {
- private Res parent;
- Zip(Res parent) { this.parent = parent; }
- public String toString() { return parent.toString() + "!zip"; }
- public String getCacheKey() throws NotCacheableException { return parent.getCacheKey() + "!zip:"; }
- public InputStream getInputStream(String path) throws IOException {
- if (path.startsWith("/")) path = path.substring(1);
- 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 Res {
- private Res parent;
- Cab(Res parent) { this.parent = parent; }
- public String toString() { return parent.toString() + "!cab"; }
- public String getCacheKey() throws NotCacheableException { return parent.getCacheKey() + "!cab:"; }
- public InputStream getInputStream(String path) throws IOException {
- if (path.startsWith("/")) path = path.substring(1);
- return new org.xwt.translators.MSPack(parent.getInputStream()).getInputStream(path);
- }
- }
-
- /** the Builtin resource */
- public static class Builtin extends Res {
- public Builtin() { };
- public String getCacheKey() throws NotCacheableException { throw notCacheable; } // not cacheable
- public String toString() { return "builtin:"; }
- public InputStream getInputStream(String path) throws IOException {
- if (!path.equals("")) throw new IOException("the builtin resource has no subresources");
- return Platform.getBuiltinInputStream();
- }
- }
-
- /** what you get when you reference a subresource */
- public static class Ref extends Res {
- Res parent;
- Object key;
- public String toString() { return parent.toString() + "/" + key; }
- Ref(Res parent, Object key) { this.parent = parent; this.key = key; }
- public String getCacheKey() throws NotCacheableException { return parent.getCacheKey() + "/" + key; }
- public Res addExtension(String extension) {
- return ((String)key).endsWith(extension) ? this : new Ref(parent, key + extension); }
- public InputStream getInputStream(String path) throws IOException { return parent.getInputStream("/" + key + path); }
- }
-
- /** provides redirection of a specified key */
- public static class Graft extends Res {
- Res graftee;
- Object replaced_key, replaced_val;
- Graft(Res graftee, Object key, Object val) { this.graftee = graftee; this.replaced_key = key; this.replaced_val = val; }
- public boolean equals(Object o) { return this == o || graftee.equals(o); }
- public int hashCode() { return graftee.hashCode(); }
- public InputStream getInputStream(String s) throws IOException { return graftee.getInputStream(s); }
- public Object get(Object key) throws JSExn { return replaced_key.equals(key) ? replaced_val : graftee.get(key); }
- public Object callMethod(Object name, Object a, Object b, Object c, Object[] rest, int nargs) throws JSExn {
- if (replaced_key.equals(name)) {
- if (replaced_val instanceof JS) return ((JS)replaced_val).call(a, b, c, rest, nargs);
- else throw new JSExn("attempted to call non-function (class="+replaced_val.getClass()+")");
- } else {
- return graftee.callMethod(name, a, b, c, rest, nargs);
- }
- }
- public Number coerceToNumber() { return graftee.coerceToNumber(); }
- public String coerceToString() { return graftee.coerceToString(); }
- public boolean coerceToBoolean() { return graftee.coerceToBoolean(); }
- public String typeName() { return graftee.typeName(); }
- }
-
- /** shadow resource which replaces the graft */
- public static class ProgressWatcher extends Res {
- final Res watchee;
- JSFunction callback;
- ProgressWatcher(Res watchee, JSFunction callback) { this.watchee = watchee; this.callback = callback; }
- public String toString() { return watchee.toString(); }
- public String getCacheKey() throws NotCacheableException { return watchee.getCacheKey(); }
- public InputStream getInputStream(String s) throws IOException {
- final InputStream is = watchee.getInputStream(s);
- 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 Scheduler.Task() { public void perform() throws Exception {
- callback.call(N(bytesDownloaded),
- N(is instanceof KnownLength ? ((KnownLength)is).getLength() : 0), null, null, 2);
- } });
- return ret;
- }
- };
- }
- }
-}
projects / org.ibex.core.git / blobdiff