http://hsqldb.org: HSQLDB - Lightweight 100% Java SQL Database Engine (The HSQL Development Group)
  • Blaine Simpson 
public class org.hsqldb.lib.java.JavaSystem
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.hsqldb.lib.java.JavaSystem
  super_class: java.lang.Object
{
  public static final java.nio.charset.Charset CS_ISO_8859_1;
    descriptor: Ljava/nio/charset/Charset;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final java.nio.charset.Charset CS_US_ASCII;
    descriptor: Ljava/nio/charset/Charset;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  public static final java.nio.charset.Charset CS_UTF8;
    descriptor: Ljava/nio/charset/Charset;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  private static int javaVersion;
    descriptor: I
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC

  static final java.math.BigDecimal BD_1;
    descriptor: Ljava/math/BigDecimal;
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  static final java.math.BigDecimal MBD_1;
    descriptor: Ljava/math/BigDecimal;
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=1, args_size=0
         0: .line 52
            ldc "ISO-8859-1"
            invokestatic java.nio.charset.Charset.forName:(Ljava/lang/String;)Ljava/nio/charset/Charset;
            putstatic org.hsqldb.lib.java.JavaSystem.CS_ISO_8859_1:Ljava/nio/charset/Charset;
         1: .line 53
            ldc "US-ASCII"
            invokestatic java.nio.charset.Charset.forName:(Ljava/lang/String;)Ljava/nio/charset/Charset;
            putstatic org.hsqldb.lib.java.JavaSystem.CS_US_ASCII:Ljava/nio/charset/Charset;
         2: .line 54
            ldc "UTF-8"
            invokestatic java.nio.charset.Charset.forName:(Ljava/lang/String;)Ljava/nio/charset/Charset;
            putstatic org.hsqldb.lib.java.JavaSystem.CS_UTF8:Ljava/nio/charset/Charset;
         3: .line 59
            ldc "java.specification.version"
         4: .line 60
            ldc "6"
         5: .line 59
            invokestatic java.lang.System.getProperty:(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
            astore 0 /* version */
        start local 0 // java.lang.String version
         6: .line 62
            aload 0 /* version */
            ldc "1."
            invokevirtual java.lang.String.startsWith:(Ljava/lang/String;)Z
            ifeq 8
         7: .line 63
            aload 0 /* version */
            iconst_2
            invokevirtual java.lang.String.substring:(I)Ljava/lang/String;
            astore 0 /* version */
         8: .line 66
      StackMap locals: java.lang.String
      StackMap stack:
            aload 0 /* version */
            invokestatic java.lang.Integer.parseInt:(Ljava/lang/String;)I
            putstatic org.hsqldb.lib.java.JavaSystem.javaVersion:I
        end local 0 // java.lang.String version
         9: .line 67
            goto 12
      StackMap locals:
      StackMap stack: java.lang.Throwable
        10: pop
        11: .line 70
            bipush 12
            putstatic org.hsqldb.lib.java.JavaSystem.javaVersion:I
        12: .line 142
      StackMap locals:
      StackMap stack:
            lconst_1
            invokestatic java.math.BigDecimal.valueOf:(J)Ljava/math/BigDecimal;
            putstatic org.hsqldb.lib.java.JavaSystem.BD_1:Ljava/math/BigDecimal;
        13: .line 143
            ldc -1
            invokestatic java.math.BigDecimal.valueOf:(J)Ljava/math/BigDecimal;
            putstatic org.hsqldb.lib.java.JavaSystem.MBD_1:Ljava/math/BigDecimal;
            return
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            6    9     0  version  Ljava/lang/String;
      Exception table:
        from    to  target  type
           3     9      10  Class java.lang.Throwable

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.hsqldb.lib.java.JavaSystem this
         0: .line 50
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.hsqldb.lib.java.JavaSystem this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/hsqldb/lib/java/JavaSystem;

  public static int javaVersion();
    descriptor: ()I
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 75
            getstatic org.hsqldb.lib.java.JavaSystem.javaVersion:I
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static long availableMemory();
    descriptor: ()J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 80
            invokestatic java.lang.Runtime.getRuntime:()Ljava/lang/Runtime;
            invokevirtual java.lang.Runtime.freeMemory:()J
            lreturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static long usedMemory();
    descriptor: ()J
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=0, args_size=0
         0: .line 84
            invokestatic java.lang.Runtime.getRuntime:()Ljava/lang/Runtime;
            invokevirtual java.lang.Runtime.totalMemory:()J
         1: .line 85
            invokestatic java.lang.Runtime.getRuntime:()Ljava/lang/Runtime;
            invokevirtual java.lang.Runtime.freeMemory:()J
         2: .line 84
            lsub
            lreturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static java.lang.Throwable unmap(java.nio.MappedByteBuffer);
    descriptor: (Ljava/nio/MappedByteBuffer;)Ljava/lang/Throwable;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=6, locals=5, args_size=1
        start local 0 // java.nio.MappedByteBuffer buffer
         0: .line 90
            aload 0 /* buffer */
            ifnonnull 2
         1: .line 91
            aconst_null
            areturn
         2: .line 94
      StackMap locals:
      StackMap stack:
            getstatic org.hsqldb.lib.java.JavaSystem.javaVersion:I
            bipush 8
            if_icmple 14
         3: .line 96
            ldc "sun.misc.Unsafe"
            invokestatic java.lang.Class.forName:(Ljava/lang/String;)Ljava/lang/Class;
            astore 1 /* unsafeClass */
        start local 1 // java.lang.Class unsafeClass
         4: .line 97
            aload 1 /* unsafeClass */
            ldc "theUnsafe"
            invokevirtual java.lang.Class.getDeclaredField:(Ljava/lang/String;)Ljava/lang/reflect/Field;
            astore 2 /* unsafeField */
        start local 2 // java.lang.reflect.Field unsafeField
         5: .line 99
            aload 2 /* unsafeField */
            iconst_1
            invokevirtual java.lang.reflect.Field.setAccessible:(Z)V
         6: .line 101
            aload 2 /* unsafeField */
            aconst_null
            invokevirtual java.lang.reflect.Field.get:(Ljava/lang/Object;)Ljava/lang/Object;
            astore 3 /* unsafe */
        start local 3 // java.lang.Object unsafe
         7: .line 102
            aload 1 /* unsafeClass */
            ldc "invokeCleaner"
            iconst_1
            anewarray java.lang.Class
            dup
            iconst_0
         8: .line 103
            ldc Ljava/nio/ByteBuffer;
            aastore
         9: .line 102
            invokevirtual java.lang.Class.getMethod:(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;
            astore 4 /* invokeCleaner */
        start local 4 // java.lang.reflect.Method invokeCleaner
        10: .line 105
            aload 4 /* invokeCleaner */
            aload 3 /* unsafe */
            iconst_1
            anewarray java.lang.Object
            dup
            iconst_0
            aload 0 /* buffer */
            aastore
            invokevirtual java.lang.reflect.Method.invoke:(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
            pop
        end local 4 // java.lang.reflect.Method invokeCleaner
        end local 3 // java.lang.Object unsafe
        end local 2 // java.lang.reflect.Field unsafeField
        end local 1 // java.lang.Class unsafeClass
        11: .line 106
            goto 26
      StackMap locals:
      StackMap stack: java.lang.Throwable
        12: astore 1 /* t */
        start local 1 // java.lang.Throwable t
        13: .line 107
            aload 1 /* t */
            areturn
        end local 1 // java.lang.Throwable t
        14: .line 111
      StackMap locals:
      StackMap stack:
            aload 0 /* buffer */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            ldc "cleaner"
            iconst_0
            anewarray java.lang.Class
            invokevirtual java.lang.Class.getMethod:(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;
            astore 1 /* cleanerMethod */
        start local 1 // java.lang.reflect.Method cleanerMethod
        15: .line 113
            aload 1 /* cleanerMethod */
            iconst_1
            invokevirtual java.lang.reflect.Method.setAccessible:(Z)V
        16: .line 115
            aload 1 /* cleanerMethod */
            aload 0 /* buffer */
            iconst_0
            anewarray java.lang.Object
            invokevirtual java.lang.reflect.Method.invoke:(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
            astore 2 /* cleaner */
        start local 2 // java.lang.Object cleaner
        17: .line 116
            aload 2 /* cleaner */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            ldc "clean"
            iconst_0
            anewarray java.lang.Class
            invokevirtual java.lang.Class.getMethod:(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;
            astore 3 /* cleanMethod */
        start local 3 // java.lang.reflect.Method cleanMethod
        18: .line 118
            aload 3 /* cleanMethod */
            aload 2 /* cleaner */
            iconst_0
            anewarray java.lang.Object
            invokevirtual java.lang.reflect.Method.invoke:(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;
            pop
        end local 3 // java.lang.reflect.Method cleanMethod
        end local 2 // java.lang.Object cleaner
        end local 1 // java.lang.reflect.Method cleanerMethod
        19: .line 119
            goto 26
      StackMap locals:
      StackMap stack: java.lang.NoSuchMethodException
        20: astore 1 /* e */
        start local 1 // java.lang.NoSuchMethodException e
        21: .line 121
            aload 1 /* e */
            areturn
        end local 1 // java.lang.NoSuchMethodException e
        22: .line 122
      StackMap locals:
      StackMap stack: java.lang.reflect.InvocationTargetException
            astore 1 /* e */
        start local 1 // java.lang.reflect.InvocationTargetException e
        23: .line 124
            aload 1 /* e */
            areturn
        end local 1 // java.lang.reflect.InvocationTargetException e
        24: .line 125
      StackMap locals:
      StackMap stack: java.lang.Throwable
            astore 1 /* t */
        start local 1 // java.lang.Throwable t
        25: .line 126
            aload 1 /* t */
            areturn
        end local 1 // java.lang.Throwable t
        26: .line 130
      StackMap locals:
      StackMap stack:
            aconst_null
            areturn
        end local 0 // java.nio.MappedByteBuffer buffer
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   27     0         buffer  Ljava/nio/MappedByteBuffer;
            4   11     1    unsafeClass  Ljava/lang/Class<*>;
            5   11     2    unsafeField  Ljava/lang/reflect/Field;
            7   11     3         unsafe  Ljava/lang/Object;
           10   11     4  invokeCleaner  Ljava/lang/reflect/Method;
           13   14     1              t  Ljava/lang/Throwable;
           15   19     1  cleanerMethod  Ljava/lang/reflect/Method;
           17   19     2        cleaner  Ljava/lang/Object;
           18   19     3    cleanMethod  Ljava/lang/reflect/Method;
           21   22     1              e  Ljava/lang/NoSuchMethodException;
           23   24     1              e  Ljava/lang/reflect/InvocationTargetException;
           25   26     1              t  Ljava/lang/Throwable;
      Exception table:
        from    to  target  type
           3    11      12  Class java.lang.Throwable
          14    19      20  Class java.lang.NoSuchMethodException
          14    19      22  Class java.lang.reflect.InvocationTargetException
          14    19      24  Class java.lang.Throwable
    MethodParameters:
        Name  Flags
      buffer  

  public static java.io.IOException toIOException(java.lang.Throwable);
    descriptor: (Ljava/lang/Throwable;)Ljava/io/IOException;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // java.lang.Throwable t
         0: .line 135
            aload 0 /* t */
            instanceof java.io.IOException
            ifeq 2
         1: .line 136
            aload 0 /* t */
            checkcast java.io.IOException
            areturn
         2: .line 139
      StackMap locals:
      StackMap stack:
            new java.io.IOException
            dup
            aload 0 /* t */
            invokespecial java.io.IOException.<init>:(Ljava/lang/Throwable;)V
            areturn
        end local 0 // java.lang.Throwable t
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0     t  Ljava/lang/Throwable;
    MethodParameters:
      Name  Flags
      t     

  public static int precision(java.math.BigDecimal);
    descriptor: (Ljava/math/BigDecimal;)I
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // java.math.BigDecimal o
         0: .line 147
            aload 0 /* o */
            ifnonnull 2
         1: .line 148
            iconst_0
            ireturn
         2: .line 153
      StackMap locals:
      StackMap stack:
            aload 0 /* o */
            getstatic org.hsqldb.lib.java.JavaSystem.BD_1:Ljava/math/BigDecimal;
            invokevirtual java.math.BigDecimal.compareTo:(Ljava/math/BigDecimal;)I
            ifge 5
            aload 0 /* o */
            getstatic org.hsqldb.lib.java.JavaSystem.MBD_1:Ljava/math/BigDecimal;
            invokevirtual java.math.BigDecimal.compareTo:(Ljava/math/BigDecimal;)I
            ifle 5
         3: .line 154
            aload 0 /* o */
            invokevirtual java.math.BigDecimal.scale:()I
            istore 1 /* precision */
        start local 1 // int precision
         4: .line 155
            goto 6
        end local 1 // int precision
         5: .line 156
      StackMap locals:
      StackMap stack:
            aload 0 /* o */
            invokevirtual java.math.BigDecimal.precision:()I
            istore 1 /* precision */
        start local 1 // int precision
         6: .line 159
      StackMap locals: int
      StackMap stack:
            iload 1 /* precision */
            ireturn
        end local 1 // int precision
        end local 0 // java.math.BigDecimal o
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    7     0          o  Ljava/math/BigDecimal;
            4    5     1  precision  I
            6    7     1  precision  I
    MethodParameters:
      Name  Flags
      o     
}
SourceFile: "JavaSystem.java"