| /* Copyright (c) 2001-2010, The HSQL Development Group |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * Redistributions of source code must retain the above copyright notice, this |
| * list of conditions and the following disclaimer. |
| * |
| * 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. |
| * |
| * Neither the name of the HSQL Development Group nor the names of its |
| * contributors may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS 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 HSQL DEVELOPMENT GROUP, HSQLDB.ORG, |
| * OR 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. |
| */ |
| |
| |
| package org.hsqldb.lib.java; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.PrintStream; |
| import java.io.PrintWriter; |
| import java.math.BigDecimal; |
| import java.math.BigInteger; |
| import java.sql.DriverManager; |
| import java.util.Properties; |
| import java.text.Collator; |
| import java.io.RandomAccessFile; |
| |
| /** |
| * Handles the differences between JDK 1.1.x and 1.2.x and above |
| * |
| * @author Fred Toussi (fredt@users dot sourceforge.net) |
| * @version 1.9.0 |
| */ |
| public class JavaSystem { |
| |
| // variables to track rough count on object creation, to use in gc |
| public static int gcFrequency; |
| public static int memoryRecords; |
| |
| // Garbage Collection |
| public static void gc() { |
| |
| if ((gcFrequency > 0) && (memoryRecords > gcFrequency)) { |
| memoryRecords = 0; |
| |
| System.gc(); |
| } |
| } |
| |
| public static IOException toIOException(Throwable t) { |
| |
| if (t instanceof IOException) { |
| return (IOException) t; |
| } |
| |
| //#ifdef JAVA6 |
| return new IOException(t); |
| |
| //#else |
| /* |
| return new IOException(t.getMessage()); |
| */ |
| |
| //#endif JAVA6 |
| } |
| |
| final static BigDecimal BD_1 = BigDecimal.valueOf(1L); |
| final static BigDecimal MBD_1 = BigDecimal.valueOf(-1L); |
| |
| public static int precision(BigDecimal o) { |
| |
| if (o == null) { |
| return 0; |
| } |
| |
| //#ifdef JAVA6 |
| int precision; |
| |
| if (o.compareTo(BD_1) < 0 && o.compareTo(MBD_1) > 0) { |
| precision = o.scale(); |
| } else { |
| precision = o.precision(); |
| } |
| |
| return precision; |
| |
| //#else |
| /* |
| if (o.compareTo(BD_1) < 0 && o.compareTo(MBD_1) > 0) { |
| return o.scale(); |
| } |
| |
| BigInteger big = o.unscaledValue(); |
| int sign = big.signum() == -1 ? 1 |
| : 0; |
| |
| return big.toString().length() - sign; |
| */ |
| |
| //#endif JAVA6 |
| } |
| |
| public static String toString(BigDecimal o) { |
| |
| if (o == null) { |
| return null; |
| } |
| |
| //#ifdef JAVA6 |
| return o.toPlainString(); |
| |
| //#else |
| /* |
| return o.toString(); |
| */ |
| |
| //#endif JAVA6 |
| } |
| |
| public static int compareIngnoreCase(String a, String b) { |
| |
| //#ifdef JAVA2FULL |
| return a.compareToIgnoreCase(b); |
| |
| //#else |
| /* |
| return a.toUpperCase().compareTo(b.toUpperCase()); |
| */ |
| |
| //#endif JAVA2 |
| } |
| |
| public static double parseDouble(String s) { |
| |
| //#ifdef JAVA2FULL |
| return Double.parseDouble(s); |
| |
| //#else |
| /* |
| return new Double(s).doubleValue(); |
| */ |
| |
| //#endif JAVA2 |
| } |
| |
| public static BigInteger unscaledValue(BigDecimal o) { |
| |
| //#ifdef JAVA2FULL |
| return o.unscaledValue(); |
| |
| //#else |
| /* |
| int scale = o.scale(); |
| return o.movePointRight(scale).toBigInteger(); |
| */ |
| |
| //#endif |
| } |
| |
| public static void setLogToSystem(boolean value) { |
| |
| //#ifdef JAVA2FULL |
| try { |
| PrintWriter newPrintWriter = (value) ? new PrintWriter(System.out) |
| : null; |
| |
| DriverManager.setLogWriter(newPrintWriter); |
| } catch (Exception e) {} |
| |
| //#else |
| /* |
| try { |
| PrintStream newOutStream = (value) ? System.out |
| : null; |
| DriverManager.setLogStream(newOutStream); |
| } catch (Exception e){} |
| */ |
| |
| //#endif |
| } |
| |
| public static void deleteOnExit(File f) { |
| |
| //#ifdef JAVA2FULL |
| f.deleteOnExit(); |
| |
| //#endif |
| } |
| |
| public static void saveProperties(Properties props, String name, |
| OutputStream os) throws IOException { |
| |
| //#ifdef JAVA2FULL |
| props.store(os, name); |
| |
| //#else |
| /* |
| props.save(os, name); |
| */ |
| |
| //#endif |
| } |
| |
| public static void runFinalizers() { |
| |
| //#ifdef JAVA2FULL |
| System.runFinalizersOnExit(true); |
| |
| //#endif |
| } |
| |
| public static boolean createNewFile(File file) { |
| |
| //#ifdef JAVA2FULL |
| try { |
| return file.createNewFile(); |
| } catch (IOException e) {} |
| |
| return false; |
| |
| //#else |
| /* |
| return true; |
| */ |
| |
| //#endif |
| } |
| |
| public static void setRAFileLength(RandomAccessFile raFile, |
| long length) throws IOException { |
| |
| //#ifdef JAVA2FULL |
| raFile.setLength(length); |
| |
| //#endif |
| } |
| } |