| /******************************************************************************* |
| * Copyright (c) 2000, 2011 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdi.internal.request; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import org.eclipse.jdi.internal.MirrorImpl; |
| |
| public class RequestID { |
| /** |
| * Null request ID, returned by Virtual Machine in events that were not |
| * requested. |
| */ |
| private static final int NULL_REQUEST_ID = 0; |
| public static final RequestID nullID = new RequestID(NULL_REQUEST_ID); |
| |
| /** Integer representation of request ID. */ |
| private int fRequestID; |
| |
| /** |
| * Creates new request ID. |
| */ |
| private RequestID(int ID) { |
| fRequestID = ID; |
| } |
| |
| /** |
| * @return Returns whether the request ID is a NULL ID, which means that |
| * there is no corresponding request. |
| */ |
| public boolean isNull() { |
| return fRequestID == NULL_REQUEST_ID; |
| } |
| |
| /** |
| * @return Returns true if two RequestIDs are the same. |
| * @see java.lang.Object#equals(Object) |
| */ |
| @Override |
| public boolean equals(Object object) { |
| return object != null && object.getClass().equals(this.getClass()) |
| && fRequestID == ((RequestID) object).fRequestID; |
| } |
| |
| /** |
| * @return Returns a has code for this object. |
| * @see java.lang.Object#hashCode |
| */ |
| @Override |
| public int hashCode() { |
| return fRequestID; |
| } |
| |
| /** |
| * @return Returns string representation. |
| */ |
| @Override |
| public String toString() { |
| return Long.valueOf(fRequestID).toString(); |
| } |
| |
| /** |
| * Writes IDto stream. |
| */ |
| public void write(MirrorImpl target, DataOutputStream out) |
| throws IOException { |
| target.writeInt(fRequestID, "request ID", out); //$NON-NLS-1$ |
| } |
| |
| /** |
| * @return Returns a new request ID read from stream. |
| */ |
| public static RequestID read(MirrorImpl target, DataInputStream in) |
| throws IOException { |
| int result = target.readInt("request ID", in); //$NON-NLS-1$ |
| return new RequestID(result); |
| } |
| } |