1 /*
   2  * Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.tools.jconsole.inspector;
  27 
  28 import java.awt.Color;
  29 import java.awt.Component;
  30 import java.lang.reflect.Array;
  31 import java.util.Collection;
  32 import java.util.Map;
  33 import javax.swing.JEditorPane;
  34 import javax.swing.JScrollPane;
  35 
  36 class XArrayDataViewer {
  37 
  38     private XArrayDataViewer() {}
  39 
  40     public static boolean isViewableValue(Object value) {
  41         return Utils.canBeRenderedAsArray(value);
  42     }
  43 
  44     public static Component loadArray(Object value) {
  45         Component comp = null;
  46         if (isViewableValue(value)) {
  47             Object[] arr;
  48             if (value instanceof Collection) {
  49                 arr = ((Collection<?>) value).toArray();
  50             } else if (value instanceof Map) {
  51                 arr = ((Map<?,?>) value).entrySet().toArray();
  52             } else if (value instanceof Object[]) {
  53                 arr = (Object[]) value;
  54             } else {
  55                 int length = Array.getLength(value);
  56                 arr = new Object[length];
  57                 for (int i = 0; i < length; i++) {
  58                     arr[i] = Array.get(value, i);
  59                 }
  60             }
  61             JEditorPane arrayEditor = new JEditorPane();
  62             arrayEditor.setContentType("text/html");
  63             arrayEditor.setEditable(false);
  64             Color evenRowColor = arrayEditor.getBackground();
  65             int red = evenRowColor.getRed();
  66             int green = evenRowColor.getGreen();
  67             int blue = evenRowColor.getBlue();
  68             String evenRowColorStr =
  69                     "rgb(" + red + "," + green + "," + blue + ")";
  70             Color oddRowColor = new Color(
  71                     red < 20 ? red + 20 : red - 20,
  72                     green < 20 ? green + 20 : green - 20,
  73                     blue < 20 ? blue + 20 : blue - 20);
  74             String oddRowColorStr =
  75                     "rgb(" + oddRowColor.getRed() + "," +
  76                     oddRowColor.getGreen() + "," +
  77                     oddRowColor.getBlue() + ")";
  78             Color foreground = arrayEditor.getForeground();
  79             String textColor = String.format("%06x",
  80                                              foreground.getRGB() & 0xFFFFFF);
  81             StringBuilder sb = new StringBuilder();
  82             sb.append("<html><body text=#"+textColor+"><table width=\"100%\">");
  83             for (int i = 0; i < arr.length; i++) {
  84                 if (i % 2 == 0) {
  85                     sb.append("<tr style=\"background-color: " +
  86                             evenRowColorStr + "\"><td><pre>" +
  87                             (arr[i] == null ?
  88                                 arr[i] : htmlize(arr[i].toString())) +
  89                             "</pre></td></tr>");
  90                 } else {
  91                     sb.append("<tr style=\"background-color: " +
  92                             oddRowColorStr + "\"><td><pre>" +
  93                             (arr[i] == null ?
  94                                 arr[i] : htmlize(arr[i].toString())) +
  95                             "</pre></td></tr>");
  96                 }
  97             }
  98             if (arr.length == 0) {
  99                 sb.append("<tr style=\"background-color: " +
 100                         evenRowColorStr + "\"><td></td></tr>");
 101             }
 102             sb.append("</table></body></html>");
 103             arrayEditor.setText(sb.toString());
 104             JScrollPane scrollp = new JScrollPane(arrayEditor);
 105             comp = scrollp;
 106         }
 107         return comp;
 108     }
 109 
 110     private static String htmlize(String value) {
 111         return value.replace("&", "&amp;").replace("<", "&lt;");
 112     }
 113 }