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Diffstat (limited to 'infrastructure/rhino1_7R1/examples/File.java')
| -rw-r--r-- | infrastructure/rhino1_7R1/examples/File.java | 348 |
1 files changed, 0 insertions, 348 deletions
diff --git a/infrastructure/rhino1_7R1/examples/File.java b/infrastructure/rhino1_7R1/examples/File.java deleted file mode 100644 index 62bd980..0000000 --- a/infrastructure/rhino1_7R1/examples/File.java +++ /dev/null @@ -1,348 +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) 1997-2000 - * the Initial Developer. All Rights Reserved. - * - * Contributor(s): - * Norris Boyd - * - * 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.io.*; -import java.util.Vector; - -/** - * Define a simple JavaScript File object. - * - * This isn't intended to be any sort of definitive attempt at a - * standard File object for JavaScript, but instead is an example - * of a more involved definition of a host object. - * - * Example of use of the File object: - * <pre> - * js> defineClass("File") - * js> file = new File("myfile.txt"); - * [object File] - * js> file.writeLine("one"); <i>only now is file actually opened</i> - * js> file.writeLine("two"); - * js> file.writeLine("thr", "ee"); - * js> file.close(); <i>must close file before we can reopen for reading</i> - * js> var a = file.readLines(); <i>creates and fills an array with the contents of the file</i> - * js> a; - * one,two,three - * js> - * </pre> - * - * - * File errors or end-of-file signaled by thrown Java exceptions will - * be wrapped as JavaScript exceptions when called from JavaScript, - * and may be caught within JavaScript. - * - * @author Norris Boyd - */ -public class File extends ScriptableObject { - - /** - * The zero-parameter constructor. - * - * When Context.defineClass is called with this class, it will - * construct File.prototype using this constructor. - */ - public File() { - } - - /** - * The Java method defining the JavaScript File constructor. - * - * If the constructor has one or more arguments, and the - * first argument is not undefined, the argument is converted - * to a string as used as the filename.<p> - * - * Otherwise System.in or System.out is assumed as appropriate - * to the use. - */ - public static Scriptable jsConstructor(Context cx, Object[] args, - Function ctorObj, - boolean inNewExpr) - { - File result = new File(); - if (args.length == 0 || args[0] == Context.getUndefinedValue()) { - result.name = ""; - result.file = null; - } else { - result.name = Context.toString(args[0]); - result.file = new java.io.File(result.name); - } - return result; - } - - /** - * Returns the name of this JavaScript class, "File". - */ - public String getClassName() { - return "File"; - } - - /** - * Get the name of the file. - * - * Used to define the "name" property. - */ - public String jsGet_name() { - return name; - } - - /** - * Read the remaining lines in the file and return them in an array. - * - * Implements a JavaScript function.<p> - * - * This is a good example of creating a new array and setting - * elements in that array. - * - * @exception IOException if an error occurred while accessing the file - * associated with this object - */ - public Object jsFunction_readLines() - throws IOException - { - Vector v = new Vector(); - String s; - while ((s = jsFunction_readLine()) != null) { - v.addElement(s); - } - Object[] lines = new Object[v.size()]; - v.copyInto(lines); - - Scriptable scope = ScriptableObject.getTopLevelScope(this); - Context cx = Context.getCurrentContext(); - return cx.newObject(scope, "Array", lines); - } - - /** - * Read a line. - * - * Implements a JavaScript function. - * @exception IOException if an error occurred while accessing the file - * associated with this object, or EOFException if the object - * reached the end of the file - */ - public String jsFunction_readLine() throws IOException { - return getReader().readLine(); - } - - /** - * Read a character. - * - * @exception IOException if an error occurred while accessing the file - * associated with this object, or EOFException if the object - * reached the end of the file - */ - public String jsFunction_readChar() throws IOException { - int i = getReader().read(); - if (i == -1) - return null; - char[] charArray = { (char) i }; - return new String(charArray); - } - - /** - * Write strings. - * - * Implements a JavaScript function. <p> - * - * This function takes a variable number of arguments, converts - * each argument to a string, and writes that string to the file. - * @exception IOException if an error occurred while accessing the file - * associated with this object - */ - public static void jsFunction_write(Context cx, Scriptable thisObj, - Object[] args, Function funObj) - throws IOException - { - write0(thisObj, args, false); - } - - /** - * Write strings and a newline. - * - * Implements a JavaScript function. - * @exception IOException if an error occurred while accessing the file - * associated with this object - * - */ - public static void jsFunction_writeLine(Context cx, Scriptable thisObj, - Object[] args, Function funObj) - throws IOException - { - write0(thisObj, args, true); - } - - public int jsGet_lineNumber() - throws FileNotFoundException - { - return getReader().getLineNumber(); - } - - /** - * Close the file. It may be reopened. - * - * Implements a JavaScript function. - * @exception IOException if an error occurred while accessing the file - * associated with this object - */ - public void jsFunction_close() throws IOException { - if (reader != null) { - reader.close(); - reader = null; - } else if (writer != null) { - writer.close(); - writer = null; - } - } - - /** - * Finalizer. - * - * Close the file when this object is collected. - */ - protected void finalize() { - try { - jsFunction_close(); - } - catch (IOException e) { - } - } - - /** - * Get the Java reader. - */ - public Object jsFunction_getReader() { - if (reader == null) - return null; - // Here we use toObject() to "wrap" the BufferedReader object - // in a Scriptable object so that it can be manipulated by - // JavaScript. - Scriptable parent = ScriptableObject.getTopLevelScope(this); - return Context.javaToJS(reader, parent); - } - - /** - * Get the Java writer. - * - * @see File#jsFunction_getReader - * - */ - public Object jsFunction_getWriter() { - if (writer == null) - return null; - Scriptable parent = ScriptableObject.getTopLevelScope(this); - return Context.javaToJS(writer, parent); - } - - /** - * Get the reader, checking that we're not already writing this file. - */ - private LineNumberReader getReader() throws FileNotFoundException { - if (writer != null) { - throw Context.reportRuntimeError("already writing file \"" - + name - + "\""); - } - if (reader == null) - reader = new LineNumberReader(file == null - ? new InputStreamReader(System.in) - : new FileReader(file)); - return reader; - } - - /** - * Perform the guts of write and writeLine. - * - * Since the two functions differ only in whether they write a - * newline character, move the code into a common subroutine. - * - */ - private static void write0(Scriptable thisObj, Object[] args, boolean eol) - throws IOException - { - File thisFile = checkInstance(thisObj); - if (thisFile.reader != null) { - throw Context.reportRuntimeError("already writing file \"" - + thisFile.name - + "\""); - } - if (thisFile.writer == null) - thisFile.writer = new BufferedWriter( - thisFile.file == null ? new OutputStreamWriter(System.out) - : new FileWriter(thisFile.file)); - for (int i=0; i < args.length; i++) { - String s = Context.toString(args[i]); - thisFile.writer.write(s, 0, s.length()); - } - if (eol) - thisFile.writer.newLine(); - } - - /** - * Perform the instanceof check and return the downcasted File object. - * - * This is necessary since methods may reside in the File.prototype - * object and scripts can dynamically alter prototype chains. For example: - * <pre> - * js> defineClass("File"); - * js> o = {}; - * [object Object] - * js> o.__proto__ = File.prototype; - * [object File] - * js> o.write("hi"); - * js: called on incompatible object - * </pre> - * The runtime will take care of such checks when non-static Java methods - * are defined as JavaScript functions. - */ - private static File checkInstance(Scriptable obj) { - if (obj == null || !(obj instanceof File)) { - throw Context.reportRuntimeError("called on incompatible object"); - } - return (File) obj; - } - - /** - * Some private data for this class. - */ - private String name; - private java.io.File file; // may be null, meaning to use System.out or .in - private LineNumberReader reader; - private BufferedWriter writer; -} - |