// ============================================================================
//
// Copyright (C) 2006-2016 Talend Inc. - www.talend.com
//
// This source code is available under agreement available at
// %InstallDIR%\features\org.talend.rcp.branding.%PRODUCTNAME%\%PRODUCTNAME%license.txt
//
// You should have received a copy of the agreement
// along with this program; if not, write to Talend SA
// 9 rue Pages 92150 Suresnes, France
//
// ============================================================================
package com.amalto.workbench.models;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.swt.dnd.ByteArrayTransfer;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.TransferData;
public class TreeObjectTransfer extends ByteArrayTransfer {
private static Log log = LogFactory.getLog(TreeObjectTransfer.class);
private static final String TYPENAME = "treeobjectdata";//$NON-NLS-1$
private static final int TYPEID = registerType(TYPENAME);
private static TreeObjectTransfer _instance = new TreeObjectTransfer();
public static TreeObjectTransfer getInstance() {
return _instance;
}
private TreeObject[] treeObjs;
public void javaToNative(Object object, TransferData transferData) {
if (!checkType(object) || !isSupportedType(transferData)) {
DND.error(DND.ERROR_INVALID_DATA);
}
treeObjs = (TreeObject[]) object;
ByteArrayOutputStream byteS = new ByteArrayOutputStream();
DataOutputStream writeOut = new DataOutputStream(byteS);
try {
for (TreeObject treeData : treeObjs) {
writeOut.writeInt(treeData.getType());
}
byte[] buffer = byteS.toByteArray();
super.javaToNative(buffer, transferData);
writeOut.close();
} catch (IOException e) {
log.error(e.getMessage(), e);
}
}
public Object nativeToJava(TransferData transferData) {
if (!isSupportedType(transferData))
return null;
byte[] buffer = (byte[]) super.nativeToJava(transferData);
if (buffer == null)
return null;
if (treeObjs != null)
return treeObjs;
return transferData;
}
protected String[] getTypeNames() {
return new String[] { TYPENAME };
}
protected int[] getTypeIds() {
return new int[] { TYPEID };
}
boolean checkType(Object object) {
return (object != null && object instanceof TreeObject[]);
}
protected boolean validate(Object object) {
return checkType(object);
}
}