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/*
* $Id$
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2012 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
package virtuoso.jdbc2;
import java.lang.*;
import java.io.*;
/**
* The VString class is an implementation DV_WIDE strings.
*
* @author Boris Muratshin
*/
public final class VirtuosoString
{
// The string itself
private byte[] bytes = null;
// the dv code as it will be serialized in future request
private int dv = VirtuosoTypes.DV_SHORT_STRING;
/**
* Initializes a newly created <code>VirtuosoString</code> object.
*
* @param s a<code>Object</code>.
* @param iswide a<code>boolean</code>.
*/
public VirtuosoString (Object obj, String enc, int dv, int length)
{
bytesFromObject(obj, enc, dv, length);
}
/**
* Returns a length of wrapped string
*
*/
public int length ()
{
return bytes.length;
}
/**
* Returns a dv code of the wrapped string
*
*/
public int getDV ()
{
return dv;
}
/**
* Calculates a dv code of the wrapped string
*
* @param iswide a<code>boolean</code>.
*/
protected int setDV (boolean iswide)
{
if (iswide)
dv = (bytes.length>255)?
VirtuosoTypes.DV_LONG_WIDE:VirtuosoTypes.DV_WIDE;
else
dv = (bytes.length>255)?
VirtuosoTypes.DV_LONG_STRING:VirtuosoTypes.DV_SHORT_STRING;
return dv;
}
/**
* Returns the wrapped string itself
*
* @param s a<code>String</code>.
*/
public byte[] getValue ()
{
return bytes;
}
/**
* Initializes a newly created <code>VirtuosoString</code> object.
*
* @param s a<code>Object</code>.
* @param iswide a<code>boolean</code>.
*/
protected byte[] bytesFromObject (Object obj, String enc, int _dv, int length)
{
boolean iswide = isWide(_dv);
StringBuffer sb = new StringBuffer ();
String s = "";
int c;
if (obj instanceof Reader)
{
Reader r = (Reader)obj;
try {for (;-1!=(c=r.read());)sb.append((char)c);} catch (IOException e){}
s = sb.toString();
try {
bytes = s.getBytes(iswide?"UTF8":enc);
} catch (UnsupportedEncodingException e)
{
try { bytes = s.getBytes("8859_1");} catch (UnsupportedEncodingException ee){};
};
setDV (iswide);
}
else if (obj instanceof InputStream)
{
InputStream r = (InputStream)obj;
bytes = new byte[length];
try {for (c=0;c<length;c++) bytes[c]=(byte)r.read();} catch (IOException e){}
if (iswide)
{
s = new String(bytes);
try { bytes = s.getBytes("UTF8");} catch (UnsupportedEncodingException ee){};
}
setDV (iswide);
}
else if (obj instanceof String)
{
s = (String)obj;
try {
bytes = s.getBytes(iswide?"UTF8":enc);
} catch (UnsupportedEncodingException e)
{
try { bytes = s.getBytes("8859_1");} catch (UnsupportedEncodingException ee){};
};
setDV (iswide);
}
else if (obj instanceof byte[])
{
if (VirtuosoTypes.DV_LONG_BIN == _dv || VirtuosoTypes.DV_BIN == _dv)
{
int l = ((byte[])obj).length;
bytes = new byte[l];
System.arraycopy((byte[])obj, 0, bytes, 0, l);
dv = (l>255)? VirtuosoTypes.DV_LONG_BIN:VirtuosoTypes.DV_BIN;
}
else
{
try {
s = new String((byte[])obj, enc);
bytes = s.getBytes(iswide?"UTF8":enc);
} catch (UnsupportedEncodingException e)
{
try { bytes = s.getBytes("8859_1");} catch (UnsupportedEncodingException ee){};
};
setDV (iswide);
}
}
return bytes;
}
/**
* Returns boolean which means if the parameter corresponding to the parameterIndex
* was pre-compiled and found as wide
*
* @param parameterIndex the first parameter is 1, the second is 2, ...
*/
public static boolean isWide(int dv)
{
boolean iswide;
iswide = (VirtuosoTypes.DV_WIDE == dv ||
VirtuosoTypes.DV_BLOB_WIDE == dv ||
VirtuosoTypes.DV_LONG_WIDE == dv ||
VirtuosoTypes.DV_BLOB_WIDE_HANDLE == dv)?true:false;
return iswide;
}
/**
* Returns boolean which means if the parameter corresponding to the parameterIndex
* was pre-compiled and found as blob(clob)
*
* @param parameterIndex the first parameter is 1, the second is 2, ...
*/
public static boolean isBlob(int dv)
{
boolean isblob;
isblob = ( VirtuosoTypes.DV_BLOB_HANDLE == dv ||
VirtuosoTypes.DV_BLOB == dv ||
VirtuosoTypes.DV_BLOB_BIN == dv ||
VirtuosoTypes.DV_BLOB_WIDE == dv ||
VirtuosoTypes.DV_BLOB_XPER == dv ||
VirtuosoTypes.DV_BLOB_XPER_HANDLE == dv ||
VirtuosoTypes.DV_BLOB_WIDE_HANDLE == dv)?true:false;
return isblob;
}
/**
* Returns boolean which means if the parameter corresponding to the parameterIndex
* was pre-compiled and found as varchar
*
* @param parameterIndex the first parameter is 1, the second is 2, ...
*/
public static boolean isString(int dv)
{
boolean isstr;
isstr = ( VirtuosoTypes.DV_C_STRING == dv ||
VirtuosoTypes.DV_BIN == dv ||
VirtuosoTypes.DV_LONG_BIN == dv ||
VirtuosoTypes.DV_LONG_STRING == dv ||
VirtuosoTypes.DV_SHORT_STRING == dv ||
VirtuosoTypes.DV_WIDE == dv)?true:false;
return isstr;
}
}
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