Spec-Zone .ru
спецификации, руководства, описания, API
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001/* 002 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. 003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 004 * 005 * This code is free software; you can redistribute it and/or modify it 006 * under the terms of the GNU General Public License version 2 only, as 007 * published by the Free Software Foundation. Oracle designates this 008 * particular file as subject to the "Classpath" exception as provided 009 * by Oracle in the LICENSE file that accompanied this code. 010 * 011 * This code is distributed in the hope that it will be useful, but WITHOUT 012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 014 * version 2 for more details (a copy is included in the LICENSE file that 015 * accompanied this code). 016 * 017 * You should have received a copy of the GNU General Public License version 018 * 2 along with this work; if not, write to the Free Software Foundation, 019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 020 * 021 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 022 * or visit www.oracle.com if you need additional information or have any 023 * questions. 024 */ 025 026package javafx.embed.swt; 027 028import java.nio.ByteBuffer; 029 030import org.eclipse.swt.dnd.ByteArrayTransfer; 031import org.eclipse.swt.dnd.DND; 032import org.eclipse.swt.dnd.TransferData; 033 034public class CustomTransfer extends ByteArrayTransfer { 035 private String name, mime; 036 037 public CustomTransfer (String name, String mime) { 038 this.name = name; 039 this.mime = mime; 040 } 041 042 public String getName () { 043 return name; 044 } 045 046 public String getMime () { 047 return mime; 048 } 049 050 public void javaToNative (Object object, TransferData transferData) { 051 if (!checkCustom(object) || !isSupportedType(transferData)) { 052 DND.error(DND.ERROR_INVALID_DATA); 053 } 054 byte [] bytes = null; 055 if (object instanceof ByteBuffer) { 056 bytes = ((ByteBuffer)object).array(); 057 } else { 058 if (object instanceof byte []) bytes = (byte []) object; 059 } 060 if (bytes == null) DND.error(DND.ERROR_INVALID_DATA); 061 super.javaToNative(bytes, transferData); 062 } 063 064 public Object nativeToJava(TransferData transferData){ 065 if (isSupportedType(transferData)) { 066 return super.nativeToJava(transferData); 067 } 068 return null; 069 } 070 071 protected String[] getTypeNames(){ 072 return new String [] {name}; 073 } 074 075 protected int[] getTypeIds(){ 076 return new int [] {registerType(name)}; 077 } 078 079 boolean checkByteArray(Object object) { 080 return (object != null && object instanceof byte[] && ((byte[])object).length > 0); 081 } 082 083 boolean checkByteBuffer(Object object) { 084 return (object != null && object instanceof ByteBuffer && ((ByteBuffer)object).limit() > 0); 085 } 086 087 boolean checkCustom(Object object) { 088 return checkByteArray(object) || checkByteBuffer(object); 089 } 090 091 protected boolean validate(Object object) { 092 return checkCustom(object); 093 } 094}