author | ksrini |
Thu, 23 Dec 2010 13:51:30 -0800 | |
changeset 7810 | d4730191e53c |
parent 7297 | 906c58a8b849 |
child 7997 | 78536cac0841 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
|
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* questions. |
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*/ |
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package sun.launcher; |
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|
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/* |
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* |
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* <p><b>This is NOT part of any API supported by Sun Microsystems. |
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* If you write code that depends on this, you do so at your own |
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* risk. This code and its internal interfaces are subject to change |
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* or deletion without notice.</b> |
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* |
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*/ |
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/** |
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* A utility package for the java(1), javaw(1) launchers. |
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* The following are helper methods that the native launcher uses |
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* to perform checks etc. using JNI, see src/share/bin/java.c |
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*/ |
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import java.io.File; |
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import java.io.IOException; |
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import java.io.PrintStream; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.Modifier; |
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import java.math.BigDecimal; |
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import java.math.RoundingMode; |
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import java.util.ResourceBundle; |
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import java.text.MessageFormat; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Locale; |
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import java.util.Locale.Category; |
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import java.util.Properties; |
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import java.util.Set; |
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import java.util.TreeSet; |
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import java.util.jar.Attributes; |
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import java.util.jar.JarFile; |
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import java.util.jar.Manifest; |
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public enum LauncherHelper { |
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INSTANCE; |
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private static final String defaultBundleName = |
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"sun.launcher.resources.launcher"; |
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private static final String MAIN_CLASS = "Main-Class"; |
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private static StringBuilder outBuf = new StringBuilder(); |
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private static ResourceBundle javarb = null; |
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private static final String INDENT = " "; |
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private static final String VM_SETTINGS = "VM settings:"; |
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private static final String PROP_SETTINGS = "Property settings:"; |
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private static final String LOCALE_SETTINGS = "Locale settings:"; |
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private static synchronized ResourceBundle getLauncherResourceBundle() { |
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if (javarb == null) { |
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javarb = ResourceBundle.getBundle(defaultBundleName); |
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} |
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return javarb; |
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} |
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/* |
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* A method called by the launcher to print out the standard settings, |
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* by default -XshowSettings is equivalent to -XshowSettings:all, |
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* Specific information may be gotten by using suboptions with possible |
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* values vm, properties and locale. |
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* |
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* printToStderr: choose between stdout and stderr |
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* |
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* optionFlag: specifies which options to print default is all other |
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* possible values are vm, properties, locale. |
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* |
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* initialHeapSize: in bytes, as set by the launcher, a zero-value indicates |
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* this code should determine this value, using a suitable method or |
|
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* the line could be omitted. |
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* |
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* maxHeapSize: in bytes, as set by the launcher, a zero-value indicates |
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* this code should determine this value, using a suitable method. |
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* |
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* stackSize: in bytes, as set by the launcher, a zero-value indicates |
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* this code determine this value, using a suitable method or omit the |
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* line entirely. |
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*/ |
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static void showSettings(boolean printToStderr, String optionFlag, |
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long initialHeapSize, long maxHeapSize, long stackSize, |
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boolean isServer) { |
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PrintStream ostream = (printToStderr) ? System.err : System.out; |
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String opts[] = optionFlag.split(":"); |
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String optStr = (opts.length > 1 && opts[1] != null) |
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? opts[1].trim() |
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: "all"; |
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switch (optStr) { |
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case "vm": |
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printVmSettings(ostream, initialHeapSize, maxHeapSize, |
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stackSize, isServer); |
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break; |
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case "properties": |
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printProperties(ostream); |
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break; |
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case "locale": |
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printLocale(ostream); |
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break; |
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default: |
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printVmSettings(ostream, initialHeapSize, maxHeapSize, |
130 |
stackSize, isServer); |
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printProperties(ostream); |
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printLocale(ostream); |
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break; |
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} |
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} |
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/* |
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* prints the main vm settings subopt/section |
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*/ |
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private static void printVmSettings(PrintStream ostream, |
141 |
long initialHeapSize, long maxHeapSize, |
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long stackSize, boolean isServer) { |
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ostream.println(VM_SETTINGS); |
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145 |
if (stackSize != 0L) { |
7810 | 146 |
ostream.println(INDENT + "Stack Size: " + |
147 |
SizePrefix.scaleValue(stackSize)); |
|
148 |
} |
|
149 |
if (initialHeapSize != 0L) { |
|
150 |
ostream.println(INDENT + "Min. Heap Size: " + |
|
151 |
SizePrefix.scaleValue(initialHeapSize)); |
|
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} |
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153 |
if (maxHeapSize != 0L) { |
7810 | 154 |
ostream.println(INDENT + "Max. Heap Size: " + |
155 |
SizePrefix.scaleValue(maxHeapSize)); |
|
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} else { |
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ostream.println(INDENT + "Max. Heap Size (Estimated): " |
7810 | 158 |
+ SizePrefix.scaleValue(Runtime.getRuntime().maxMemory())); |
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} |
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ostream.println(INDENT + "Ergonomics Machine Class: " |
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+ ((isServer) ? "server" : "client")); |
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ostream.println(INDENT + "Using VM: " |
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+ System.getProperty("java.vm.name")); |
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164 |
ostream.println(); |
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165 |
} |
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166 |
|
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167 |
/* |
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* prints the properties subopt/section |
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169 |
*/ |
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private static void printProperties(PrintStream ostream) { |
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Properties p = System.getProperties(); |
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ostream.println(PROP_SETTINGS); |
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List<String> sortedPropertyKeys = new ArrayList<>(); |
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sortedPropertyKeys.addAll(p.stringPropertyNames()); |
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Collections.sort(sortedPropertyKeys); |
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for (String x : sortedPropertyKeys) { |
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printPropertyValue(ostream, x, p.getProperty(x)); |
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178 |
} |
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179 |
ostream.println(); |
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180 |
} |
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181 |
|
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182 |
private static boolean isPath(String key) { |
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return key.endsWith(".dirs") || key.endsWith(".path"); |
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184 |
} |
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185 |
|
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186 |
private static void printPropertyValue(PrintStream ostream, |
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String key, String value) { |
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188 |
ostream.print(INDENT + key + " = "); |
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|
189 |
if (key.equals("line.separator")) { |
7810 | 190 |
for (byte b : value.getBytes()) { |
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191 |
switch (b) { |
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192 |
case 0xd: |
7810 | 193 |
ostream.print("\\r "); |
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194 |
break; |
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195 |
case 0xa: |
7810 | 196 |
ostream.print("\\n "); |
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197 |
break; |
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198 |
default: |
7810 | 199 |
// print any bizzare line separators in hex, but really |
200 |
// shouldn't happen. |
|
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201 |
ostream.printf("0x%02X", b & 0xff); |
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202 |
break; |
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|
203 |
} |
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|
204 |
} |
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|
205 |
ostream.println(); |
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|
206 |
return; |
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|
207 |
} |
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|
208 |
if (!isPath(key)) { |
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|
209 |
ostream.println(value); |
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|
210 |
return; |
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|
211 |
} |
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|
212 |
String[] values = value.split(System.getProperty("path.separator")); |
7810 | 213 |
boolean first = true; |
214 |
for (String s : values) { |
|
215 |
if (first) { // first line treated specially |
|
216 |
ostream.println(s); |
|
217 |
first = false; |
|
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218 |
} else { // following lines prefix with indents |
7810 | 219 |
ostream.println(INDENT + INDENT + s); |
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220 |
} |
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|
221 |
} |
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|
222 |
} |
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|
223 |
|
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|
224 |
/* |
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|
225 |
* prints the locale subopt/section |
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|
226 |
*/ |
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|
227 |
private static void printLocale(PrintStream ostream) { |
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|
228 |
Locale locale = Locale.getDefault(); |
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|
229 |
ostream.println(LOCALE_SETTINGS); |
7810 | 230 |
ostream.println(INDENT + "default locale = " + |
231 |
locale.getDisplayLanguage()); |
|
232 |
ostream.println(INDENT + "default display locale = " + |
|
233 |
Locale.getDefault(Category.DISPLAY).getDisplayName()); |
|
234 |
ostream.println(INDENT + "default format locale = " + |
|
235 |
Locale.getDefault(Category.FORMAT).getDisplayName()); |
|
7297
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|
236 |
printLocales(ostream); |
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|
237 |
ostream.println(); |
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|
238 |
} |
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|
239 |
|
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|
240 |
private static void printLocales(PrintStream ostream) { |
7810 | 241 |
Locale[] tlocales = Locale.getAvailableLocales(); |
242 |
final int len = tlocales == null ? 0 : tlocales.length; |
|
7297
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|
243 |
if (len < 1 ) { |
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|
244 |
return; |
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|
245 |
} |
7810 | 246 |
// Locale does not implement Comparable so we convert it to String |
247 |
// and sort it for pretty printing. |
|
248 |
Set<String> sortedSet = new TreeSet<>(); |
|
249 |
for (Locale l : tlocales) { |
|
250 |
sortedSet.add(l.toString()); |
|
251 |
} |
|
252 |
||
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|
253 |
ostream.print(INDENT + "available locales = "); |
7810 | 254 |
Iterator<String> iter = sortedSet.iterator(); |
255 |
final int last = len - 1; |
|
256 |
for (int i = 0 ; iter.hasNext() ; i++) { |
|
257 |
String s = iter.next(); |
|
258 |
ostream.print(s); |
|
7297
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|
259 |
if (i != last) { |
906c58a8b849
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|
260 |
ostream.print(", "); |
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|
261 |
} |
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|
262 |
// print columns of 8 |
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|
263 |
if ((i + 1) % 8 == 0) { |
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|
264 |
ostream.println(); |
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|
265 |
ostream.print(INDENT + INDENT); |
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|
266 |
} |
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|
267 |
} |
7810 | 268 |
} |
269 |
||
270 |
private enum SizePrefix { |
|
271 |
||
272 |
KILO(1024, "K"), |
|
273 |
MEGA(1024 * 1024, "M"), |
|
274 |
GIGA(1024 * 1024 * 1024, "G"), |
|
275 |
TERA(1024L * 1024L * 1024L * 1024L, "T"); |
|
276 |
long size; |
|
277 |
String abbrev; |
|
278 |
||
279 |
SizePrefix(long size, String abbrev) { |
|
280 |
this.size = size; |
|
281 |
this.abbrev = abbrev; |
|
282 |
} |
|
283 |
||
284 |
private static String scale(long v, SizePrefix prefix) { |
|
285 |
return BigDecimal.valueOf(v).divide(BigDecimal.valueOf(prefix.size), |
|
286 |
2, RoundingMode.HALF_EVEN).toPlainString() + prefix.abbrev; |
|
287 |
} |
|
288 |
/* |
|
289 |
* scale the incoming values to a human readable form, represented as |
|
290 |
* K, M, G and T, see java.c parse_size for the scaled values and |
|
291 |
* suffixes. The lowest possible scaled value is Kilo. |
|
292 |
*/ |
|
293 |
static String scaleValue(long v) { |
|
294 |
if (v < MEGA.size) { |
|
295 |
return scale(v, KILO); |
|
296 |
} else if (v < GIGA.size) { |
|
297 |
return scale(v, MEGA); |
|
298 |
} else if (v < TERA.size) { |
|
299 |
return scale(v, GIGA); |
|
300 |
} else { |
|
301 |
return scale(v, TERA); |
|
302 |
} |
|
303 |
} |
|
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304 |
} |
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|
305 |
|
1323
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|
306 |
/** |
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|
307 |
* A private helper method to get a localized message and also |
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|
308 |
* apply any arguments that we might pass. |
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|
309 |
*/ |
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|
310 |
private static String getLocalizedMessage(String key, Object... args) { |
2168
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|
311 |
String msg = getLauncherResourceBundle().getString(key); |
1323
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|
312 |
return (args != null) ? MessageFormat.format(msg, args) : msg; |
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313 |
} |
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|
314 |
|
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|
315 |
/** |
e14a3b3536cd
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|
316 |
* The java -help message is split into 3 parts, an invariant, followed |
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|
317 |
* by a set of platform dependent variant messages, finally an invariant |
e14a3b3536cd
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|
318 |
* set of lines. |
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|
319 |
* This method initializes the help message for the first time, and also |
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|
320 |
* assembles the invariant header part of the message. |
e14a3b3536cd
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|
321 |
*/ |
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|
322 |
static void initHelpMessage(String progname) { |
e14a3b3536cd
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|
323 |
outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.header", |
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|
324 |
(progname == null) ? "java" : progname )); |
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|
325 |
outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.datamodel", |
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|
326 |
32)); |
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|
327 |
outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.datamodel", |
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|
328 |
64)); |
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|
329 |
} |
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|
330 |
|
e14a3b3536cd
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|
331 |
/** |
e14a3b3536cd
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|
332 |
* Appends the vm selection messages to the header, already created. |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
333 |
* initHelpSystem must already be called. |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
334 |
*/ |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
335 |
static void appendVmSelectMessage(String vm1, String vm2) { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
336 |
outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.vmselect", |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
337 |
vm1, vm2)); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
338 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
339 |
|
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
340 |
/** |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
341 |
* Appends the vm synoym message to the header, already created. |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
342 |
* initHelpSystem must be called before using this method. |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
343 |
*/ |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
344 |
static void appendVmSynonymMessage(String vm1, String vm2) { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
345 |
outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.hotspot", |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
346 |
vm1, vm2)); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
347 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
348 |
|
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
349 |
/** |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
350 |
* Appends the vm Ergo message to the header, already created. |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
351 |
* initHelpSystem must be called before using this method. |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
352 |
*/ |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
353 |
static void appendVmErgoMessage(boolean isServerClass, String vm) { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
354 |
outBuf = outBuf.append(getLocalizedMessage("java.launcher.ergo.message1", |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
355 |
vm)); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
356 |
outBuf = (isServerClass) |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
357 |
? outBuf.append(",\n" + |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
358 |
getLocalizedMessage("java.launcher.ergo.message2") + "\n\n") |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
359 |
: outBuf.append(".\n\n"); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
360 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
361 |
|
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
362 |
/** |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
363 |
* Appends the last invariant part to the previously created messages, |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
364 |
* and finishes up the printing to the desired output stream. |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
365 |
* initHelpSystem must be called before using this method. |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
366 |
*/ |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
367 |
static void printHelpMessage(boolean printToStderr) { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
368 |
PrintStream ostream = (printToStderr) ? System.err : System.out; |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
369 |
outBuf = outBuf.append(getLocalizedMessage("java.launcher.opt.footer", |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
370 |
File.pathSeparator)); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
371 |
ostream.println(outBuf.toString()); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
372 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
373 |
|
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
374 |
/** |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
375 |
* Prints the Xusage text to the desired output stream. |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
376 |
*/ |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
377 |
static void printXUsageMessage(boolean printToStderr) { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
378 |
PrintStream ostream = (printToStderr) ? System.err : System.out; |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
379 |
ostream.println(getLocalizedMessage("java.launcher.X.usage", |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
380 |
File.pathSeparator)); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
381 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
382 |
|
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
383 |
static String getMainClassFromJar(String jarname) throws IOException { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
384 |
JarFile jarFile = null; |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
385 |
try { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
386 |
jarFile = new JarFile(jarname); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
387 |
Manifest manifest = jarFile.getManifest(); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
388 |
if (manifest == null) { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
389 |
throw new IOException("manifest not found in " + jarname); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
390 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
391 |
Attributes mainAttrs = manifest.getMainAttributes(); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
392 |
if (mainAttrs == null) { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
393 |
throw new IOException("no main mainifest attributes, in " + |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
394 |
jarname); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
395 |
} |
1329
ce13b59a8401
4459600: java -jar fails to run Main-Class if classname followed by whitespace.
ksrini
parents:
1323
diff
changeset
|
396 |
return mainAttrs.getValue(MAIN_CLASS).trim(); |
1323
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
397 |
} finally { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
398 |
if (jarFile != null) { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
399 |
jarFile.close(); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
400 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
401 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
402 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
403 |
|
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
404 |
/** |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
405 |
* This method does the following: |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
406 |
* 1. gets the classname from a Jar's manifest, if necessary |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
407 |
* 2. loads the class using the System ClassLoader |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
408 |
* 3. ensures the availability and accessibility of the main method, |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
409 |
* using signatureDiagnostic method. |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
410 |
* a. does the class exist |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
411 |
* b. is there a main |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
412 |
* c. is the main public |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
413 |
* d. is the main static |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
414 |
* c. does the main take a String array for args |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
415 |
* 4. and off we go...... |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
416 |
* |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
417 |
* @param printToStderr |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
418 |
* @param isJar |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
419 |
* @param name |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
420 |
* @return |
1343
ecc86134ee4c
6758881: (launcher) needs to throw NoClassDefFoundError instead of JavaRuntimeException
ksrini
parents:
1329
diff
changeset
|
421 |
* @throws java.io.IOException |
1323
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
422 |
*/ |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
423 |
public static Object checkAndLoadMain(boolean printToStderr, |
1343
ecc86134ee4c
6758881: (launcher) needs to throw NoClassDefFoundError instead of JavaRuntimeException
ksrini
parents:
1329
diff
changeset
|
424 |
boolean isJar, String name) throws IOException { |
1323
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
425 |
// get the class name |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
426 |
String classname = (isJar) ? getMainClassFromJar(name) : name; |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
427 |
classname = classname.replace('/', '.'); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
428 |
ClassLoader loader = ClassLoader.getSystemClassLoader(); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
429 |
Class<?> clazz = null; |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
430 |
PrintStream ostream = (printToStderr) ? System.err : System.out; |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
431 |
try { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
432 |
clazz = loader.loadClass(classname); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
433 |
} catch (ClassNotFoundException cnfe) { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
434 |
ostream.println(getLocalizedMessage("java.launcher.cls.error1", classname)); |
1343
ecc86134ee4c
6758881: (launcher) needs to throw NoClassDefFoundError instead of JavaRuntimeException
ksrini
parents:
1329
diff
changeset
|
435 |
NoClassDefFoundError ncdfe = new NoClassDefFoundError(classname); |
ecc86134ee4c
6758881: (launcher) needs to throw NoClassDefFoundError instead of JavaRuntimeException
ksrini
parents:
1329
diff
changeset
|
436 |
ncdfe.initCause(cnfe); |
ecc86134ee4c
6758881: (launcher) needs to throw NoClassDefFoundError instead of JavaRuntimeException
ksrini
parents:
1329
diff
changeset
|
437 |
throw ncdfe; |
1323
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
438 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
439 |
signatureDiagnostic(ostream, clazz); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
440 |
return clazz; |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
441 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
442 |
|
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
443 |
static void signatureDiagnostic(PrintStream ostream, Class<?> clazz) { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
444 |
String classname = clazz.getName(); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
445 |
Method method = null; |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
446 |
try { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
447 |
method = clazz.getMethod("main", String[].class); |
5982
de622fe4f7d8
6856415: Enabling java security manager will make programe thrown wrong exception ( main method not found )
ksrini
parents:
5506
diff
changeset
|
448 |
} catch (NoSuchMethodException nsme) { |
1323
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
449 |
ostream.println(getLocalizedMessage("java.launcher.cls.error4", |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
450 |
classname)); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
451 |
throw new RuntimeException("Main method not found in " + classname); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
452 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
453 |
/* |
1329
ce13b59a8401
4459600: java -jar fails to run Main-Class if classname followed by whitespace.
ksrini
parents:
1323
diff
changeset
|
454 |
* getMethod (above) will choose the correct method, based |
ce13b59a8401
4459600: java -jar fails to run Main-Class if classname followed by whitespace.
ksrini
parents:
1323
diff
changeset
|
455 |
* on its name and parameter type, however, we still have to |
ce13b59a8401
4459600: java -jar fails to run Main-Class if classname followed by whitespace.
ksrini
parents:
1323
diff
changeset
|
456 |
* ensure that the method is static and returns a void. |
1323
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
457 |
*/ |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
458 |
int mod = method.getModifiers(); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
459 |
if (!Modifier.isStatic(mod)) { |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
460 |
ostream.println(getLocalizedMessage("java.launcher.cls.error2", |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
461 |
"static", classname)); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
462 |
throw new RuntimeException("Main method is not static in class " + |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
463 |
classname); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
464 |
} |
5982
de622fe4f7d8
6856415: Enabling java security manager will make programe thrown wrong exception ( main method not found )
ksrini
parents:
5506
diff
changeset
|
465 |
if (method.getReturnType() != java.lang.Void.TYPE) { |
1323
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
466 |
ostream.println(getLocalizedMessage("java.launcher.cls.error3", |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
467 |
classname)); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
468 |
throw new RuntimeException("Main method must return a value" + |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
469 |
" of type void in class " + |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
470 |
classname); |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
471 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
472 |
return; |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
473 |
} |
e14a3b3536cd
6742159: (launcher) improve the java launching mechanism
ksrini
parents:
diff
changeset
|
474 |
} |