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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
package com.sun.star.sdbcx.comp.hsqldb;
public class StorageAccess implements org.hsqldb.lib.Storage {
String key;
String name;
boolean readonly;
NativeStorageAccess access;
/** Creates a new instance of StorageAccess */
public StorageAccess(String name,Boolean readonly,Object key) throws java.io.IOException{
this.key = (String)key;
this.name = name;
this.readonly = readonly.booleanValue();
try {
access = new NativeStorageAccess(name,
this.readonly ? "r" : "rw"
,key);
} catch(Exception e){
throw new java.io.IOException();
}
}
public void close() throws java.io.IOException{
access.close(name,key);
}
public long getFilePointer() throws java.io.IOException{
return access.getFilePointer(name,key);
}
public long length() throws java.io.IOException{
return access.length(name,key);
}
public int read() throws java.io.IOException{
return access.read(name,key);
}
public void read(byte[] b, int off, int len) throws java.io.IOException{
access.read(name,key,b,off,len);
}
// based on the same code that reads an int from the .data file in HSQLDB
public int readInt() throws java.io.IOException{
byte [] tmp = new byte [4];
int count = access.read(name,key,tmp,0, 4);
if (count != 4){
throw new java.io.IOException();
}
count = 0;
int ch0 = tmp[count++] & 0xff;
int ch1 = tmp[count++] & 0xff;
int ch2 = tmp[count++] & 0xff;
int ch3 = tmp[count] & 0xff;
return ((ch0 << 24) + (ch1 << 16) + (ch2 << 8) + (ch3));
}
public void seek(long position) throws java.io.IOException{
access.seek(name,key,position);
}
public void write(byte[] b, int offset, int length) throws java.io.IOException{
access.write(name,key,b,offset,length);
}
public void writeInt(int v) throws java.io.IOException{
byte [] oneByte = new byte [4];
oneByte[0] = (byte) ((v >>> 24) & 0xFF);
oneByte[1] = (byte) ((v >>> 16) & 0xFF);
oneByte[2] = (byte) ((v >>> 8) & 0xFF);
oneByte[3] = (byte) ((v >>> 0) & 0xFF);
write(oneByte,0,4);
}
public boolean isReadOnly() {
return readonly;
}
@SuppressWarnings("cast")
public long readLong() throws java.io.IOException {
return (((long) readInt()) << 32) + (((long) readInt()) & 0xFFFFFFFFL);
}
public boolean wasNio() {
return false;
}
public void writeLong(long v) throws java.io.IOException {
byte [] oneByte = new byte [8];
oneByte[0] = (byte) ((v >>> 56) & 0xFF);
oneByte[1] = (byte) ((v >>> 48) & 0xFF);
oneByte[2] = (byte) ((v >>> 40) & 0xFF);
oneByte[3] = (byte) ((v >>> 32) & 0xFF);
oneByte[4] = (byte) ((v >>> 24) & 0xFF);
oneByte[5] = (byte) ((v >>> 16) & 0xFF);
oneByte[6] = (byte) ((v >>> 8) & 0xFF);
oneByte[7] = (byte) ((v >>> 0) & 0xFF);
write(oneByte,0,8);
}
}
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