/*
* Copyright (C) 2013 University of Dundee & Open Microscopy Environment.
* All rights reserved.
*
* This program 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package ome.services.util;
import java.lang.reflect.Method;
/**
* Methods for working with Ice.
*/
public class IceUtil {
private static final Object ICE_ENCODING;
private static final Method ICE_OUTPUT_STREAM_METHOD;
private static final Method ICE_INPUT_STREAM_METHOD;
static {
Class<Ice.Communicator> ic = Ice.Communicator.class;
Class<byte[]> b = byte[].class;
Method os = null;
Method is = null;
Object enc = null;
try {
try {
Class<?> ev = Class.forName("Ice.EncodingVersion");
os = Ice.Util.class.getMethod("createOutputStream", ic, ev);
is = Ice.Util.class.getMethod("createInputStream", ic, b, ev);
enc = Ice.Util.class.getField("Encoding_1_0").get(null);
} catch (ClassNotFoundException e) {
// Then this is pre Ice3.5
os = Ice.Util.class.getMethod("createOutputStream", ic);
is = Ice.Util.class.getMethod("createInputStream", ic, b);
}
} catch (Exception e) {
// This shouldn't be able to happen unless there's been
// a breaking change in Ice.
throw new RuntimeException("Cannot configure Ice", e);
}
ICE_ENCODING = enc;
ICE_OUTPUT_STREAM_METHOD = os;
ICE_INPUT_STREAM_METHOD = is;
}
/**
* Creates an {@link Ice.OutputStream} with the appropriate encoding.
* This should only be used parsing objects/streams between Ice versions,
* for example when the data is or will be stored in the database.
*
* See ticket:11322
*/
public static Ice.OutputStream createSafeOutputStream(Ice.Communicator ic) {
Object[] args;
if (ICE_ENCODING != null) {
args = new Object[]{ic, ICE_ENCODING};
} else {
args = new Object[]{ic};
}
try {
return (Ice.OutputStream) ICE_OUTPUT_STREAM_METHOD.invoke(null, args);
} catch (Exception e) {
throw new RuntimeException("ICE_INPUT_STREAM_METHOD failed", e);
}
}
/**
* Creates an {@link Ice.InputStream} with the appropriate encoding.
* This should only be used parsing objects/streams between Ice versions,
* for example when the data is or will be stored in the database.
*
* See ticket:11322
*/
public static Ice.InputStream createSafeInputStream(Ice.Communicator ic, byte[] data) {
Object[] args;
if (ICE_ENCODING != null) {
args = new Object[]{ic, data, ICE_ENCODING};
} else {
args = new Object[]{ic, data};
}
try {
return (Ice.InputStream) ICE_INPUT_STREAM_METHOD.invoke(null, args);
} catch (Exception e) {
throw new RuntimeException("ICE_INPUT_STREAM_METHOD failed", e);
}
}
}