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142 lines
4.5 KiB
142 lines
4.5 KiB
/*
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* Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.awt.datatransfer;
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import java.io.*;
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/**
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* A <code>Transferable</code> which implements the capability required
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* to transfer a <code>String</code>.
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*
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* This <code>Transferable</code> properly supports
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* <code>DataFlavor.stringFlavor</code>
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* and all equivalent flavors. Support for
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* <code>DataFlavor.plainTextFlavor</code>
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* and all equivalent flavors is <b>deprecated</b>. No other
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* <code>DataFlavor</code>s are supported.
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*
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* @see java.awt.datatransfer.DataFlavor#stringFlavor
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* @see java.awt.datatransfer.DataFlavor#plainTextFlavor
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*/
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public class StringSelection implements Transferable, ClipboardOwner {
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private static final int STRING = 0;
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private static final int PLAIN_TEXT = 1;
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private static final DataFlavor[] flavors = {
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DataFlavor.stringFlavor,
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DataFlavor.plainTextFlavor // deprecated
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};
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private String data;
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/**
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* Creates a <code>Transferable</code> capable of transferring
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* the specified <code>String</code>.
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*/
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public StringSelection(String data) {
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this.data = data;
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}
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/**
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* Returns an array of flavors in which this <code>Transferable</code>
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* can provide the data. <code>DataFlavor.stringFlavor</code>
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* is properly supported.
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* Support for <code>DataFlavor.plainTextFlavor</code> is
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* <b>deprecated</b>.
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*
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* @return an array of length two, whose elements are <code>DataFlavor.
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* stringFlavor</code> and <code>DataFlavor.plainTextFlavor</code>
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*/
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public DataFlavor[] getTransferDataFlavors() {
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// returning flavors itself would allow client code to modify
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// our internal behavior
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return (DataFlavor[])flavors.clone();
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}
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/**
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* Returns whether the requested flavor is supported by this
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* <code>Transferable</code>.
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*
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* @param flavor the requested flavor for the data
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* @return true if <code>flavor</code> is equal to
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* <code>DataFlavor.stringFlavor</code> or
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* <code>DataFlavor.plainTextFlavor</code>; false if <code>flavor</code>
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* is not one of the above flavors
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* @throws NullPointerException if flavor is <code>null</code>
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*/
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public boolean isDataFlavorSupported(DataFlavor flavor) {
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// JCK Test StringSelection0003: if 'flavor' is null, throw NPE
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for (int i = 0; i < flavors.length; i++) {
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if (flavor.equals(flavors[i])) {
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return true;
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}
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}
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return false;
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}
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/**
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* Returns the <code>Transferable</code>'s data in the requested
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* <code>DataFlavor</code> if possible. If the desired flavor is
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* <code>DataFlavor.stringFlavor</code>, or an equivalent flavor,
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* the <code>String</code> representing the selection is
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* returned. If the desired flavor is
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* <code>DataFlavor.plainTextFlavor</code>,
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* or an equivalent flavor, a <code>Reader</code> is returned.
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* <b>Note:</b> The behavior of this method for
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* <code>DataFlavor.plainTextFlavor</code>
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* and equivalent <code>DataFlavor</code>s is inconsistent with the
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* definition of <code>DataFlavor.plainTextFlavor</code>.
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*
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* @param flavor the requested flavor for the data
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* @return the data in the requested flavor, as outlined above
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* @throws UnsupportedFlavorException if the requested data flavor is
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* not equivalent to either <code>DataFlavor.stringFlavor</code>
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* or <code>DataFlavor.plainTextFlavor</code>
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* @throws IOException if an IOException occurs while retrieving the data.
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* By default, StringSelection never throws this exception, but a
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* subclass may.
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* @throws NullPointerException if flavor is <code>null</code>
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* @see java.io.Reader
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*/
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public Object getTransferData(DataFlavor flavor)
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throws UnsupportedFlavorException, IOException
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{
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// JCK Test StringSelection0007: if 'flavor' is null, throw NPE
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if (flavor.equals(flavors[STRING])) {
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return (Object)data;
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} else if (flavor.equals(flavors[PLAIN_TEXT])) {
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return new StringReader(data == null ? "" : data);
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} else {
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throw new UnsupportedFlavorException(flavor);
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}
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}
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public void lostOwnership(Clipboard clipboard, Transferable contents) {
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}
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}
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