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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.featuretree;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.DataInputStream;
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import java.io.DataOutputStream;
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import java.io.EOFException;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.UUID;
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import org.eclipse.swt.SWTException;
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import org.eclipse.swt.dnd.ByteArrayTransfer;
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import org.eclipse.swt.dnd.TransferData;
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import eu.etaxonomy.cdm.api.service.IFeatureNodeService;
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import eu.etaxonomy.cdm.model.description.Feature;
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import eu.etaxonomy.cdm.model.term.TermNode;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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import eu.etaxonomy.taxeditor.store.CdmStore;
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/**
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* <p>FeatureNodeTransfer class.</p>
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*
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* @author n.hoffmann
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* @created Aug 5, 2010
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*/
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public class TermNodeTransfer extends ByteArrayTransfer {
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private static TermNodeTransfer instance = new TermNodeTransfer();
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private static final String TYPE_NAME = "featureNode-transfer-format";
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private static final int TYPEID = registerType(TYPE_NAME);
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/**
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* <p>Getter for the field <code>instance</code>.</p>
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*
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* @return a {@link eu.etaxonomy.taxeditor.featuretree.FeatureNodeTransfer} object.
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*/
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public static synchronized TermNodeTransfer getInstance() {
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return instance;
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}
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private TermNodeTransfer() {
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}
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/** {@inheritDoc} */
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@Override
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protected int[] getTypeIds() {
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return new int[] { TYPEID };
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}
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/** {@inheritDoc} */
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@Override
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protected String[] getTypeNames() {
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return new String[] { TYPE_NAME };
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}
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@Override
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protected void javaToNative(Object object, TransferData transferData) {
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if (object != null){
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byte[] bytes = toByteArray((TermNode[]) object);
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if (bytes != null) {
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super.javaToNative(bytes, transferData);
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}
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}
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}
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@Override
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protected Object nativeToJava(TransferData transferData) {
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try{
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byte[] bytes = (byte[]) super.nativeToJava(transferData);
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if (bytes != null){
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return fromByteArray(bytes);
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}
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}catch (SWTException e){
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MessagingUtils.warningDialog("The new imported node needs to be saved first", this, "Newly created nodes can not be moved without saving");
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}
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return null;
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}
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protected byte[] toByteArray(TermNode[] elements) {
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ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
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DataOutputStream out = new DataOutputStream(byteOut);
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byte[] bytes = null;
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try {
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for(TermNode element : elements){
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if (element.getUuid() == null){
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// MessagingUtils.warningDialog("The new imported node needs to be saved first", this, "Newly created nodes can not be moved without saving");
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}else{
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writeElementUuid(element, out);
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}
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}
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out.close();
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bytes = byteOut.toByteArray();
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} catch (IOException e) {
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// when in doubt send nothing
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}
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return bytes;
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}
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protected Object[] fromByteArray(byte[] bytes) {
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DataInputStream in = new DataInputStream(
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new ByteArrayInputStream(bytes));
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try {
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List<TermNode> elements = new ArrayList<TermNode>();
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try{
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while(true){
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UUID uuid = readElementUuid(in);
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elements.add(loadElement(uuid));
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}
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}catch(EOFException e){
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return elements.toArray();
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}
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} catch (IOException e) {
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return null;
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}
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}
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public TermNode loadElement(UUID uuid){
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TermNode<Feature> node = CdmStore.getService(IFeatureNodeService.class).load(uuid);
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return node;
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}
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public UUID readElementUuid(DataInputStream in) throws IOException{
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return UUID.fromString(in.readUTF());
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}
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private void writeElementUuid(Object element, DataOutputStream out) throws IOException {
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out.writeUTF(((TermNode)element).getUuid().toString());
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}
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}
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