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Diffstat (limited to 'trunk/infrastructure/rhino1_7R1/examples/Matrix.java')
| -rw-r--r-- | trunk/infrastructure/rhino1_7R1/examples/Matrix.java | 279 |
1 files changed, 0 insertions, 279 deletions
diff --git a/trunk/infrastructure/rhino1_7R1/examples/Matrix.java b/trunk/infrastructure/rhino1_7R1/examples/Matrix.java deleted file mode 100644 index 87e4b8a..0000000 --- a/trunk/infrastructure/rhino1_7R1/examples/Matrix.java +++ /dev/null @@ -1,279 +0,0 @@ -/* -*- 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, 1998. - * - * 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): - * - * 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 ***** */ - -import org.mozilla.javascript.*; -import java.util.Vector; - -/** - * Matrix: An example host object class that implements the Scriptable interface. - * - * Built-in JavaScript arrays don't handle multiple dimensions gracefully: the - * script writer must create every array in an array of arrays. The Matrix class - * takes care of that by automatically allocating arrays for every index that - * is accessed. What's more, the Matrix constructor takes a integer argument - * that specifies the dimension of the Matrix. If m is a Matrix with dimension 3, - * then m[0] will be a Matrix with dimension 1, and m[0][0] will be an Array. - * - * Here's a shell session showing the Matrix object in action: - * <pre> - * js> defineClass("Matrix") - * js> m = new Matrix(2); <i>A constructor call, see <a href="#Matrix">Matrix</a> below.</i> - * [object Matrix] <i>The "Matrix" here comes from <a href"#getClassName">getClassName</a>.</i> - * js> version(120); <i>switch to JavaScript1.2 to see arrays better</i> - * 0 - * js> m[0][0] = 3; - * 3 - * js> m[0]; <i>an array was created automatically!</i> - * [3] - * js> m[1]; <i>array is created even if we don't set a value</i> - * [] - * js> m.dim; <i>we can access the "dim" property</i> - * 2 - * js> m.dim = 3; - * 3 - * js> m.dim; <i>but not modify it</i> - * 2 - * </pre> - * - * @see org.mozilla.javascript.Context - * @see org.mozilla.javascript.Scriptable - * - * @author Norris Boyd - */ -public class Matrix implements Scriptable { - - /** - * The zero-parameter constructor. - * - * When ScriptableObject.defineClass is called with this class, it will - * construct Matrix.prototype using this constructor. - */ - public Matrix() { - } - - /** - * The Java constructor, also used to define the JavaScript constructor. - */ - public Matrix(int dimension) { - if (dimension <= 0) { - throw Context.reportRuntimeError( - "Dimension of Matrix must be greater than zero"); - } - dim = dimension; - v = new Vector(); - } - - /** - * Returns the name of this JavaScript class, "Matrix". - */ - public String getClassName() { - return "Matrix"; - } - - /** - * Defines the "dim" property by returning true if name is - * equal to "dim". - * <p> - * Defines no other properties, i.e., returns false for - * all other names. - * - * @param name the name of the property - * @param start the object where lookup began - */ - public boolean has(String name, Scriptable start) { - return name.equals("dim"); - } - - /** - * Defines all numeric properties by returning true. - * - * @param index the index of the property - * @param start the object where lookup began - */ - public boolean has(int index, Scriptable start) { - return true; - } - - /** - * Get the named property. - * <p> - * Handles the "dim" property and returns NOT_FOUND for all - * other names. - * @param name the property name - * @param start the object where the lookup began - */ - public Object get(String name, Scriptable start) { - if (name.equals("dim")) - return new Integer(dim); - - return NOT_FOUND; - } - - /** - * Get the indexed property. - * <p> - * Look up the element in the associated vector and return - * it if it exists. If it doesn't exist, create it.<p> - * @param index the index of the integral property - * @param start the object where the lookup began - */ - public Object get(int index, Scriptable start) { - if (index >= v.size()) - v.setSize(index+1); - Object result = v.elementAt(index); - if (result != null) - return result; - if (dim > 2) { - Matrix m = new Matrix(dim-1); - m.setParentScope(getParentScope()); - m.setPrototype(getPrototype()); - result = m; - } else { - Context cx = Context.getCurrentContext(); - Scriptable scope = ScriptableObject.getTopLevelScope(start); - result = cx.newArray(scope, 0); - } - v.setElementAt(result, index); - return result; - } - - /** - * Set a named property. - * - * We do nothing here, so all properties are effectively read-only. - */ - public void put(String name, Scriptable start, Object value) { - } - - /** - * Set an indexed property. - * - * We do nothing here, so all properties are effectively read-only. - */ - public void put(int index, Scriptable start, Object value) { - } - - /** - * Remove a named property. - * - * This method shouldn't even be called since we define all properties - * as PERMANENT. - */ - public void delete(String id) { - } - - /** - * Remove an indexed property. - * - * This method shouldn't even be called since we define all properties - * as PERMANENT. - */ - public void delete(int index) { - } - - /** - * Get prototype. - */ - public Scriptable getPrototype() { - return prototype; - } - - /** - * Set prototype. - */ - public void setPrototype(Scriptable prototype) { - this.prototype = prototype; - } - - /** - * Get parent. - */ - public Scriptable getParentScope() { - return parent; - } - - /** - * Set parent. - */ - public void setParentScope(Scriptable parent) { - this.parent = parent; - } - - /** - * Get properties. - * - * We return an empty array since we define all properties to be DONTENUM. - */ - public Object[] getIds() { - return new Object[0]; - } - - /** - * Default value. - * - * Use the convenience method from Context that takes care of calling - * toString, etc. - */ - public Object getDefaultValue(Class typeHint) { - return "[object Matrix]"; - } - - /** - * instanceof operator. - * - * We mimick the normal JavaScript instanceof semantics, returning - * true if <code>this</code> appears in <code>value</code>'s prototype - * chain. - */ - public boolean hasInstance(Scriptable value) { - Scriptable proto = value.getPrototype(); - while (proto != null) { - if (proto.equals(this)) - return true; - proto = proto.getPrototype(); - } - - return false; - } - - /** - * Some private data for this class. - */ - private int dim; - private Vector v; - private Scriptable prototype, parent; -} |