package org.apache.lucene.util;

/**
 * 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.
 */

import java.util.jar.Manifest;
import java.util.jar.Attributes;
import java.io.InputStream;
import java.net.URL;

/**
 * Some useful constants.
 *
 *
 * @version $Id$
 **/

public final class Constants {
  private Constants() {}			  // can't construct

  /** The value of <tt>System.getProperty("java.version")<tt>. **/
  public static final String JAVA_VERSION = System.getProperty("java.version");
  /** True iff this is Java version 1.1. */
  public static final boolean JAVA_1_1 = JAVA_VERSION.startsWith("1.1.");
  /** True iff this is Java version 1.2. */
  public static final boolean JAVA_1_2 = JAVA_VERSION.startsWith("1.2.");
  /** True iff this is Java version 1.3. */
  public static final boolean JAVA_1_3 = JAVA_VERSION.startsWith("1.3.");
 
  /** The value of <tt>System.getProperty("os.name")<tt>. **/
  public static final String OS_NAME = System.getProperty("os.name");
  /** True iff running on Linux. */
  public static final boolean LINUX = OS_NAME.startsWith("Linux");
  /** True iff running on Windows. */
  public static final boolean WINDOWS = OS_NAME.startsWith("Windows");
  /** True iff running on SunOS. */
  public static final boolean SUN_OS = OS_NAME.startsWith("SunOS");

  public static final String OS_ARCH = System.getProperty("os.arch");
  public static final String OS_VERSION = System.getProperty("os.version");
  public static final String JAVA_VENDOR = System.getProperty("java.vendor");

  public static final String LUCENE_VERSION;

  public static final String LUCENE_MAIN_VERSION = "2.9";

  static {
    String v = LUCENE_MAIN_VERSION + "-dev";
    try {
      // TODO: this should have worked, but doesn't seem to?
      // Package.getPackage("org.apache.lucene.util").getImplementationVersion();
      String classContainer = Constants.class.getProtectionDomain().getCodeSource().getLocation().toString();
      URL manifestUrl = new URL("jar:" + classContainer + "!/META-INF/MANIFEST.MF");
      InputStream s = manifestUrl.openStream();
      try {
        Manifest manifest = new Manifest(s);
        Attributes attr = manifest.getMainAttributes();
        String value = attr.getValue(Attributes.Name.IMPLEMENTATION_VERSION);
        if (value != null) {
          if (value.indexOf(LUCENE_MAIN_VERSION) == -1) {
            v = value + " [" + LUCENE_MAIN_VERSION + "]";
          } else {
            v = value;
          }
        }
      } finally {
        if (s != null) {
          s.close();
        }
      }
    } catch (Throwable t) {
      // ignore
    }

    LUCENE_VERSION = v;
  }
}

@@ -841,112 +841,39 @@
 ort 
-java.util.jar.Manifest;%0Aimport java.util.jar.Attributes;%0Aimport java.io.InputStream;%0Aimport java.net.URL
+org.apache.lucene.LucenePackage
 ;%0A%0A/
@@ -2223,23 +2223,36 @@
  LUCENE_
+MAIN_
 VERSION
+ = %222.9%22
 ;%0A%0A  pub
@@ -2282,38 +2282,24 @@
  LUCENE_
-MAIN_
 VERSION
- = %222.9%22;%0A
+;
 %0A  stati
@@ -2310,204 +2310,43 @@
     
-String v = LUCENE_MAIN_VERSION + %22-dev%22;%0A    try %7B%0A      // TODO: this should have worked, but doesn't seem to?%0A      // Package.getPackage(%22org.apache.lucene.util%22).getImplementationVersion
+Package pkg = LucenePackage.get
 ();%0A
-  
     
@@ -2356,477 +2356,144 @@
 ing 
-classContainer = Constants.class.getProtectionDomain().getCodeSource().getLocation().toString();%0A      URL manifestUrl = new URL(%22jar:%22 + classContainer + %22!/META-INF/MANIFEST.MF%22);%0A      InputStream s = manifestUrl.openStream();%0A      try %7B%0A        Manifest manifest = new Manifest(s
+v = (pkg == null) ? null : pkg.getImplementationVersion(
 );%0A    
-  
-  Attributes attr = manifest.getMainAttributes();%0A        String value = attr.getValue(Attributes.Name.IMPLEMENTATION_VERSION);%0A        if (value != null) %7B%0A         
+if (v == null) %7B%0A      v = LUCENE_MAIN_VERSION + %22-dev%22;%0A    %7D else
  if (v
-alue
 .ind
@@ -2533,31 +2533,21 @@
 %7B%0A      
-     
- 
 v = v
-alue
  + %22 %5B%22 
@@ -2583,200 +2583,9 @@
     
-      %7D else %7B%0A            v = value;%0A          %7D%0A        %7D%0A      %7D finally %7B%0A        if (s != null) %7B%0A          s.close();%0A        %7D%0A      %7D%0A    %7D catch (Throwable t) %7B%0A      // ignore%0A    %7D%0A
+%7D
 %0A   

use LucenePackage to get version from JAR's manifest, if available