/* Copyright (c) 2001-2014, 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.
IOException;
import java.io.
PrintWriter;
import java.math.
BigDecimal;
import java.math.
BigInteger;
import java.sql.
DriverManager;
/**
* Handles the differences between JDK 5 and above
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.0
*/
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
/*
IOException e = new IOException(t.toString());
try {
e.initCause(t);
} catch (Throwable e1) {}
return e;
*/
//#endif JAVA6
}
static final
BigDecimal BD_1 =
BigDecimal.
valueOf(1L);
static final
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 void
setLogToSystem(boolean
value) {
try {
PrintWriter newPrintWriter = (
value) ? new
PrintWriter(
System.
out)
: null;
DriverManager.
setLogWriter(
newPrintWriter);
} catch (
Exception e) {}
}
}