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JDK 1.1 compatibility fix: disabled lock files for JDK 1.1, since they rely on a feature added in JDK 1.2. 

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@149605 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Doug Cutting 2001-10-10 16:13:41 +00:00
parent 97efb88883
commit 0722fd1407
2 changed files with 88 additions and 4 deletions
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8
src/java/org/apache/lucene/store/FSDirectory.java
View File

@ -60,9 +60,7 @@ import java.io.RandomAccessFile;
import java.io.FileNotFoundException;
import java.util.Hashtable;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.InputStream;
import org.apache.lucene.store.OutputStream;
import org.apache.lucene.util.Constants;
/**
Straightforward implementation of Directory as a directory of files.
@ -213,9 +211,11 @@ final public class FSDirectory extends Directory {
final File lockFile = new File(directory, name);
return new Lock() {
public boolean obtain() throws IOException {
return lockFile.createNewFile();
if (Constants.JAVA_1_1) return true; // locks disabled in jdk 1.1
return lockFile.createNewFile();
}
public void release() {
if (Constants.JAVA_1_1) return; // locks disabled in jdk 1.1
lockFile.delete();
}
public String toString() {

84
src/java/org/apache/lucene/util/Constants.java Normal file
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@ -0,0 +1,84 @@
package org.apache.lucene.util;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache Lucene" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache Lucene", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
/**
* Some useful constants.
*
* @author Doug Cutting
* @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 Windows. */
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");
}