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Diffstat (limited to 'trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeJavaPackage.java')
| -rw-r--r-- | trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeJavaPackage.java | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeJavaPackage.java b/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeJavaPackage.java new file mode 100644 index 0000000..71f09f7 --- /dev/null +++ b/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeJavaPackage.java @@ -0,0 +1,199 @@ +/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * + * ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is Rhino code, released + * May 6, 1999. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1997-1999 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * Norris Boyd + * Frank Mitchell + * Mike Shaver + * + * Alternatively, the contents of this file may be used under the terms of + * the GNU General Public License Version 2 or later (the "GPL"), in which + * case the provisions of the GPL are applicable instead of those above. If + * you wish to allow use of your version of this file only under the terms of + * the GPL and not to allow others to use your version of this file under the + * MPL, indicate your decision by deleting the provisions above and replacing + * them with the notice and other provisions required by the GPL. If you do + * not delete the provisions above, a recipient may use your version of this + * file under either the MPL or the GPL. + * + * ***** END LICENSE BLOCK ***** */ + +package org.mozilla.javascript; + +/** + * This class reflects Java packages into the JavaScript environment. We + * lazily reflect classes and subpackages, and use a caching/sharing + * system to ensure that members reflected into one JavaPackage appear + * in all other references to the same package (as with Packages.java.lang + * and java.lang). + * + * @author Mike Shaver + * @see NativeJavaArray + * @see NativeJavaObject + * @see NativeJavaClass + */ + +public class NativeJavaPackage extends ScriptableObject +{ + static final long serialVersionUID = 7445054382212031523L; + + NativeJavaPackage(boolean internalUsage, + String packageName, ClassLoader classLoader) + { + this.packageName = packageName; + this.classLoader = classLoader; + } + + /** + * @deprecated NativeJavaPackage is an internal class, do not use + * it directly. + */ + public NativeJavaPackage(String packageName, ClassLoader classLoader) { + this(false, packageName, classLoader); + } + + /** + * @deprecated NativeJavaPackage is an internal class, do not use + * it directly. + */ + public NativeJavaPackage(String packageName) { + this(false, packageName, + Context.getCurrentContext().getApplicationClassLoader()); + } + + public String getClassName() { + return "JavaPackage"; + } + + public boolean has(String id, Scriptable start) { + return true; + } + + public boolean has(int index, Scriptable start) { + return false; + } + + public void put(String id, Scriptable start, Object value) { + // Can't add properties to Java packages. Sorry. + } + + public void put(int index, Scriptable start, Object value) { + throw Context.reportRuntimeError0("msg.pkg.int"); + } + + public Object get(String id, Scriptable start) { + return getPkgProperty(id, start, true); + } + + public Object get(int index, Scriptable start) { + return NOT_FOUND; + } + + // set up a name which is known to be a package so we don't + // need to look for a class by that name + void forcePackage(String name, Scriptable scope) + { + NativeJavaPackage pkg; + int end = name.indexOf('.'); + if (end == -1) { + end = name.length(); + } + + String id = name.substring(0, end); + Object cached = super.get(id, this); + if (cached != null && cached instanceof NativeJavaPackage) { + pkg = (NativeJavaPackage) cached; + } else { + String newPackage = packageName.length() == 0 + ? id + : packageName + "." + id; + pkg = new NativeJavaPackage(true, newPackage, classLoader); + ScriptRuntime.setObjectProtoAndParent(pkg, scope); + super.put(id, this, pkg); + } + if (end < name.length()) { + pkg.forcePackage(name.substring(end+1), scope); + } + } + + synchronized Object getPkgProperty(String name, Scriptable start, + boolean createPkg) + { + Object cached = super.get(name, start); + if (cached != NOT_FOUND) + return cached; + + String className = (packageName.length() == 0) + ? name : packageName + '.' + name; + Context cx = Context.getContext(); + ClassShutter shutter = cx.getClassShutter(); + Scriptable newValue = null; + if (shutter == null || shutter.visibleToScripts(className)) { + Class cl = null; + if (classLoader != null) { + cl = Kit.classOrNull(classLoader, className); + } else { + cl = Kit.classOrNull(className); + } + if (cl != null) { + newValue = new NativeJavaClass(getTopLevelScope(this), cl); + newValue.setPrototype(getPrototype()); + } + } + if (newValue == null && createPkg) { + NativeJavaPackage pkg; + pkg = new NativeJavaPackage(true, className, classLoader); + ScriptRuntime.setObjectProtoAndParent(pkg, getParentScope()); + newValue = pkg; + } + if (newValue != null) { + // Make it available for fast lookup and sharing of + // lazily-reflected constructors and static members. + super.put(name, start, newValue); + } + return newValue; + } + + public Object getDefaultValue(Class ignored) { + return toString(); + } + + public String toString() { + return "[JavaPackage " + packageName + "]"; + } + + public boolean equals(Object obj) { + if(obj instanceof NativeJavaPackage) { + NativeJavaPackage njp = (NativeJavaPackage)obj; + return packageName.equals(njp.packageName) && classLoader == njp.classLoader; + } + return false; + } + + public int hashCode() { + return packageName.hashCode() ^ (classLoader == null ? 0 : classLoader.hashCode()); + } + + private String packageName; + private ClassLoader classLoader; +}
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