Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (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.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ //package org.apache.sanselan.util; import java.awt.Dimension; import java.awt.Point; import java.awt.Rectangle; import java.io.File; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.Collections; import java.util.Date; import java.util.Map; public final class Debug { public static void debug(String message) { System.out.println(message); } public static void debug(Object o) { System.out.println(o == null ? "null" : o.toString()); } public static String getDebug(String message) { return message; } public static void debug() { newline(); } public static void newline() { System.out.print(newline); } public static String getDebug(String message, int value) { return getDebug(message + ": " + (value)); } public static String getDebug(String message, double value) { return getDebug(message + ": " + (value)); } public static String getDebug(String message, String value) { return getDebug(message + " " + value); } public static String getDebug(String message, long value) { return getDebug(message + " " + Long.toString(value)); } public static String getDebug(String message, int v[]) { StringBuffer result = new StringBuffer(); if (v == null) result.append(message + " (" + null + ")" + newline); else { result.append(message + " (" + v.length + ")" + newline); for (int i = 0; i < v.length; i++) result.append("\t" + v[i] + newline); result.append(newline); } return result.toString(); } public static String getDebug(String message, byte v[]) { final int max = 250; return getDebug(message, v, max); } public static String getDebug(String message, byte v[], int max) { StringBuffer result = new StringBuffer(); if (v == null) result.append(message + " (" + null + ")" + newline); else { result.append(message + " (" + v.length + ")" + newline); for (int i = 0; i < max && i < v.length; i++) { int b = 0xff & v[i]; char c; if (b == 0 || b == 10 || b == 11 || b == 13) c = ' '; else c = (char) b; result.append("\t" + i + ": " + b + " (" + c + ", 0x" + Integer.toHexString(b) + ")" + newline); } if (v.length > max) result.append("\t" + "..." + newline); result.append(newline); } return result.toString(); } public static String getDebug(String message, char v[]) { StringBuffer result = new StringBuffer(); if (v == null) result.append(getDebug(message + " (" + null + ")") + newline); else { result.append(getDebug(message + " (" + v.length + ")") + newline); for (int i = 0; i < v.length; i++) result.append(getDebug("\t" + v[i] + " (" + (0xff & v[i])) + ")" + newline); result.append(newline); } return result.toString(); } private static long counter = 0; public static String getDebug(String message, java.util.List v) { StringBuffer result = new StringBuffer(); String suffix = " [" + counter++ + "]"; result.append(getDebug(message + " (" + v.size() + ")" + suffix) + newline); for (int i = 0; i < v.size(); i++) result.append(getDebug("\t" + v.get(i).toString() + suffix) + newline); result.append(newline); return result.toString(); } public static void debug(String message, Map map) { debug(getDebug(message, map)); } public static String getDebug(String message, Map map) { StringBuffer result = new StringBuffer(); if (map == null) return getDebug(message + " map: " + null); ArrayList keys = new ArrayList(map.keySet()); result.append(getDebug(message + " map: " + keys.size()) + newline); for (int i = 0; i < keys.size(); i++) { Object key = keys.get(i); Object value = map.get(key); result.append(getDebug("\t" + i + ": '" + key + "' -> '" + value + "'") + newline); } result.append(newline); return result.toString(); } public static boolean compare(String prefix, Map a, Map b) { return compare(prefix, a, b, null, null); } // public static String newline = System.getProperty("line.separator"); public static String newline = "\r\n"; private static void log(StringBuffer buffer, String s) { Debug.debug(s); if (buffer != null) buffer.append(s + newline); } public static boolean compare(String prefix, Map a, Map b, ArrayList ignore, StringBuffer buffer) { if ((a == null) && (b == null)) { log(buffer, prefix + " both maps null"); return true; } if (a == null) { log(buffer, prefix + " map a: null, map b: map"); return false; } if (b == null) { log(buffer, prefix + " map a: map, map b: null"); return false; } ArrayList keys_a = new ArrayList(a.keySet()); ArrayList keys_b = new ArrayList(b.keySet()); if (ignore != null) { keys_a.removeAll(ignore); keys_b.removeAll(ignore); } boolean result = true; for (int i = 0; i < keys_a.size(); i++) { Object key = keys_a.get(i); if (!keys_b.contains(key)) { log(buffer, prefix + "b is missing key '" + key + "' from a"); result = false; } else { keys_b.remove(key); Object value_a = a.get(key); Object value_b = b.get(key); if (!value_a.equals(value_b)) { log(buffer, prefix + "key(" + key + ") value a: " + value_a + ") != b: " + value_b + ")"); result = false; } } } for (int i = 0; i < keys_b.size(); i++) { Object key = keys_b.get(i); log(buffer, prefix + "a is missing key '" + key + "' from b"); result = false; } if (result) log(buffer, prefix + "a is the same as b"); return result; } private static final String byteQuadToString(int bytequad) { byte b1 = (byte) ((bytequad >> 24) & 0xff); byte b2 = (byte) ((bytequad >> 16) & 0xff); byte b3 = (byte) ((bytequad >> 8) & 0xff); byte b4 = (byte) ((bytequad >> 0) & 0xff); char c1 = (char) b1; char c2 = (char) b2; char c3 = (char) b3; char c4 = (char) b4; // return new String(new char[] { c1, c2, c3, c4 }); StringBuffer fStringBuffer = new StringBuffer(); fStringBuffer.append(new String(new char[] { c1, c2, c3, c4 })); fStringBuffer.append(" bytequad: " + bytequad); fStringBuffer.append(" b1: " + b1); fStringBuffer.append(" b2: " + b2); fStringBuffer.append(" b3: " + b3); fStringBuffer.append(" b4: " + b4); return fStringBuffer.toString(); } public static String getDebug(String message, boolean value) { return getDebug(message + " " + ((value) ? ("true") : ("false"))); } public static String getDebug(String message, File file) { return getDebug(message + ": " + ((file == null) ? "null" : file.getPath())); } public static String getDebug(String message, Date value) { DateFormat df = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss"); return getDebug(message, (value == null) ? "null" : df.format(value)); } public static String getDebug(String message, Calendar value) { DateFormat df = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss"); return getDebug(message, (value == null) ? "null" : df.format(value.getTime())); } public static void debug(String message, Object value) { if (value == null) debug(message, "null"); else if (value instanceof char[]) debug(message, (char[]) value); else if (value instanceof byte[]) debug(message, (byte[]) value); else if (value instanceof int[]) debug(message, (int[]) value); else if (value instanceof String) debug(message, (String) value); else if (value instanceof java.util.List) debug(message, (java.util.List) value); else if (value instanceof Map) debug(message, (Map) value); else if (value instanceof File) debug(message, (File) value); else if (value instanceof Date) debug(message, (Date) value); else if (value instanceof Calendar) debug(message, (Calendar) value); else debug(message, value.toString()); } public static void debug(String message, Object value[]) { if (value == null) { debug(message, "null"); } else { debug(message, value.length); final int max = 10; for (int i = 0; i < value.length && i < max; i++) { debug("\t" + i, value[i]); } if (value.length > max) { debug("\t..."); } } debug(); } public static String getDebug(String message, Object value) { if (value == null) return getDebug(message, "null"); else if (value instanceof Calendar) return getDebug(message, (Calendar) value); else if (value instanceof Date) return getDebug(message, (Date) value); else if (value instanceof File) return getDebug(message, (File) value); else if (value instanceof Map) return getDebug(message, (Map) value); else if (value instanceof Map) return getDebug(message, (Map) value); // // else if (value instanceof Object) // getDebug(message, (Object) value); else if (value instanceof String) return getDebug(message, (String) value); else if (value instanceof byte[]) return getDebug(message, (byte[]) value); else if (value instanceof char[]) return getDebug(message, (char[]) value); else if (value instanceof int[]) return getDebug(message, (int[]) value); else if (value instanceof java.util.List) return getDebug(message, (java.util.List) value); else return getDebug(message, value.toString()); } public static String getType(Object value) { if (value == null) return "null"; else if (value instanceof Object[]) return "[Object[]: " + ((Object[]) value).length + "]"; else if (value instanceof char[]) return "[char[]: " + ((char[]) value).length + "]"; else if (value instanceof byte[]) return "[byte[]: " + ((byte[]) value).length + "]"; else if (value instanceof short[]) return "[short[]: " + ((short[]) value).length + "]"; else if (value instanceof int[]) return "[int[]: " + ((int[]) value).length + "]"; else if (value instanceof long[]) return "[long[]: " + ((long[]) value).length + "]"; else if (value instanceof float[]) return "[float[]: " + ((float[]) value).length + "]"; else if (value instanceof double[]) return "[double[]: " + ((double[]) value).length + "]"; else if (value instanceof boolean[]) return "[boolean[]: " + ((boolean[]) value).length + "]"; else return value.getClass().getName(); } public static boolean isArray(Object value) { if (value == null) return false; else if (value instanceof Object[]) return true; else if (value instanceof char[]) return true; else if (value instanceof byte[]) return true; else if (value instanceof short[]) return true; else if (value instanceof int[]) return true; else if (value instanceof long[]) return true; else if (value instanceof float[]) return true; else if (value instanceof double[]) return true; else if (value instanceof boolean[]) return true; else return false; } public static String getDebug(String message, Object value[]) { StringBuffer result = new StringBuffer(); if (value == null) { result.append(getDebug(message, "null") + newline); } else { result.append(getDebug(message, value.length)); final int max = 10; for (int i = 0; i < value.length && i < max; i++) { result.append(getDebug("\t" + i, value[i]) + newline); } if (value.length > max) { result.append(getDebug("\t...") + newline); } } result.append(newline); return result.toString(); } public static String getDebug(Class fClass, Throwable e) { return getDebug(fClass == null ? "[Unknown]" : fClass.getName(), e); } public static void debug(Class fClass, Throwable e) { debug(fClass.getName(), e); } private static final SimpleDateFormat timestamp = new SimpleDateFormat("yyyy-MM-dd kk:mm:ss:SSS"); public static void debug(String message, boolean value) { debug(message + " " + ((value) ? ("true") : ("false"))); } public static void debug(String message, byte v[]) { debug(getDebug(message, v)); } public static void debug(String message, char v[]) { debug(getDebug(message, v)); } public static void debug(String message, Calendar value) { DateFormat df = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss"); debug(message, (value == null) ? "null" : df.format(value.getTime())); } public static void debug(String message, Date value) { DateFormat df = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss"); debug(message, (value == null) ? "null" : df.format(value)); } public static void debug(String message, double value) { debug(message + ": " + (value)); } public static void debug(String message, File file) { debug(message + ": " + ((file == null) ? "null" : file.getPath())); } public static void debug(String message, int value) { debug(message + ": " + (value)); } public static void debug(String message, int v[]) { debug(getDebug(message, v)); } public static void debug(String message, byte v[], int max) { debug(getDebug(message, v, max)); } public static void debug(String message, java.util.List v) { String suffix = " [" + counter++ + "]"; debug(message + " (" + v.size() + ")" + suffix); for (int i = 0; i < v.size(); i++) debug("\t" + v.get(i).toString() + suffix); debug(); } public static void debug(String message, long value) { debug(message + " " + Long.toString(value)); } public static void debug(String prefix, Point p) { System.out.println(prefix + ": " + ((p == null) ? "null" : (p.x + ", " + p.y))); } public static void debug(String prefix, Rectangle r) { debug(getDebug(prefix, r)); } public static void debug(String message, String value) { debug(message + " " + value); } public static void debug(String message, Throwable e) { debug(getDebug(message, e)); } public static void debug(Throwable e) { debug(getDebug(e)); } public static void debug(Throwable e, int value) { debug(getDebug(e, value)); } public static void dumpStack() { debug(getStackTrace(new Exception("Stack trace"), -1, 1)); } public static void dumpStack(int limit) { debug(getStackTrace(new Exception("Stack trace"), limit, 1)); } public static String getDebug(String message, Throwable e) { return message + newline + getDebug(e); } public static String getDebug(Throwable e) { return getDebug(e, -1); } public static String getDebug(Throwable e, int max) { StringBuffer result = new StringBuffer(); String datetime = timestamp.format(new Date()).toLowerCase(); result.append(newline); result.append("Throwable: " + ((e == null) ? "" : ("(" + e.getClass().getName() + ")")) + ":" + datetime + newline); result.append("Throwable: " + ((e == null) ? "null" : e.getLocalizedMessage()) + newline); result.append(newline); result.append(getStackTrace(e, max)); result.append("Caught here:" + newline); result.append(getStackTrace(new Exception(), max, 1)); // Debug.dumpStack(); result.append(newline); return result.toString(); } public static String getStackTrace(Throwable e) { return getStackTrace(e, -1); } public static String getStackTrace(Throwable e, int limit) { return getStackTrace(e, limit, 0); } public static String getStackTrace(Throwable e, int limit, int skip) { StringBuffer result = new StringBuffer(); if (e != null) { StackTraceElement stes[] = e.getStackTrace(); if (stes != null) { for (int i = skip; i < stes.length && (limit < 0 || i < limit); i++) { StackTraceElement ste = stes[i]; result.append("\tat " + ste.getClassName() + "." + ste.getMethodName() + "(" + ste.getFileName() + ":" + ste.getLineNumber() + ")" + newline); } if (limit >= 0 && stes.length > limit) result.append("\t..." + newline); } // e.printStackTrace(System.out); result.append(newline); } return result.toString(); } public static void debugByteQuad(String message, int i) { int alpha = (i >> 24) & 0xff; int red = (i >> 16) & 0xff; int green = (i >> 8) & 0xff; int blue = (i >> 0) & 0xff; System.out.println(message + ": " + "alpha: " + alpha + ", " + "red: " + red + ", " + "green: " + green + ", " + "blue: " + blue); } public static void debugIPQuad(String message, int i) { int b1 = (i >> 24) & 0xff; int b2 = (i >> 16) & 0xff; int b3 = (i >> 8) & 0xff; int b4 = (i >> 0) & 0xff; System.out.println( message + ": " + "b1: " + b1 + ", " + "b2: " + b2 + ", " + "b3: " + b3 + ", " + "b4: " + b4); } public static void debugIPQuad(String message, byte bytes[]) { System.out.print(message + ": "); if (bytes == null) System.out.print("null"); else { for (int i = 0; i < bytes.length; i++) { if (i > 0) System.out.print("."); System.out.print(0xff & bytes[i]); } } System.out.println(); } public static String getDebug(String prefix, Dimension r) { String s_ar1 = "null"; String s_ar2 = "null"; if (r != null) { double aspect_ratio = ((double) r.width) / ((double) r.height); double aspect_ratio2 = 1.0 / aspect_ratio; s_ar1 = "" + aspect_ratio; s_ar2 = "" + aspect_ratio2; if (s_ar1.length() > 7) s_ar1 = s_ar1.substring(0, 7); if (s_ar2.length() > 7) s_ar2 = s_ar2.substring(0, 7); } return (prefix + ": " + ((r == null) ? "null" : (r.width + "x" + r.height)) + " aspect_ratio: " + s_ar1 + " (" + s_ar2 + ")"); } public static void debug(String prefix, Dimension r) { debug(getDebug(prefix, r)); } public static String getDebug(String prefix, Rectangle r) { String s_ar1 = "null"; String s_ar2 = "null"; if (r != null) { double aspect_ratio = ((double) r.width) / ((double) r.height); double aspect_ratio2 = 1.0 / aspect_ratio; s_ar1 = "" + aspect_ratio; s_ar2 = "" + aspect_ratio2; if (s_ar1.length() > 7) s_ar1 = s_ar1.substring(0, 7); if (s_ar2.length() > 7) s_ar2 = s_ar2.substring(0, 7); } return (prefix + ": " + ((r == null) ? "null" : (r.x + "x" + r.y + "," + r.width + "x" + r.height)) + " aspect_ratio: " + s_ar1 + " (" + s_ar2 + ")"); } public static String getDebug(String prefix, Point p) { return (prefix + ": " + ((p == null) ? "null" : (p.x + ", " + p.y))); } public static void dump(String prefix, Object value) { if (value == null) debug(prefix, "null"); else if (value instanceof Object[]) { Object[] array = (Object[]) value; debug(prefix, array); for (int i = 0; i < array.length; i++) dump(prefix + "\t" + i + ": ", array[i]); } else if (value instanceof int[]) { int[] array = (int[]) value; debug(prefix, array); for (int i = 0; i < array.length; i++) debug(prefix + "\t" + i + ": ", array[i]); } else if (value instanceof char[]) { char[] array = (char[]) value; debug(prefix, "[" + new String(array) + "]"); } else if (value instanceof long[]) { long[] array = (long[]) value; debug(prefix, array); for (int i = 0; i < array.length; i++) debug(prefix + "\t" + i + ": ", array[i]); } else if (value instanceof boolean[]) { boolean[] array = (boolean[]) value; debug(prefix, array); for (int i = 0; i < array.length; i++) debug(prefix + "\t" + i + ": ", array[i]); } else if (value instanceof byte[]) { byte[] array = (byte[]) value; debug(prefix, array); for (int i = 0; i < array.length; i++) debug(prefix + "\t" + i + ": ", array[i]); } else if (value instanceof float[]) { float[] array = (float[]) value; debug(prefix, array); for (int i = 0; i < array.length; i++) debug(prefix + "\t" + i + ": ", array[i]); } else if (value instanceof byte[]) { double[] array = (double[]) value; debug(prefix, array); for (int i = 0; i < array.length; i++) debug(prefix + "\t" + i + ": ", array[i]); } else if (value instanceof java.util.List) { java.util.List list = (java.util.List) value; debug(prefix, "list"); for (int i = 0; i < list.size(); i++) dump(prefix + "\t" + "list: " + i + ": ", list.get(i)); } else if (value instanceof Map) { java.util.Map map = (java.util.Map) value; debug(prefix, "map"); ArrayList keys = new ArrayList(map.keySet()); Collections.sort(keys); for (int i = 0; i < keys.size(); i++) { Object key = keys.get(i); dump(prefix + "\t" + "map: " + key + " -> ", map.get(key)); } } // else if (value instanceof String) // debug(prefix, value); else { debug(prefix, value.toString()); debug(prefix + "\t", value.getClass().getName()); } } public static final void purgeMemory() { try { // Thread.sleep(50); System.runFinalization(); Thread.sleep(50); System.gc(); Thread.sleep(50); } catch (Throwable e) { Debug.debug(e); } } }