| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.netbeans.modules.profiler.snaptracer; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| import javax.swing.SwingUtilities; |
| |
| /** |
| * TracerProgressObject describes progress of the TracerPackage/TracerProbe |
| * initialization when starting a Tracer session. |
| * |
| * @author Jiri Sedlacek |
| */ |
| public final class TracerProgressObject { |
| |
| private final int steps; |
| private String text; |
| private int currentStep; |
| private int lastStep; |
| |
| private final Set<Listener> listeners; |
| |
| |
| /** |
| * Creates new instance of TracerProgressObject with a defined number of |
| * steps. |
| * |
| * @param steps number of steps to finish the initialization |
| */ |
| public TracerProgressObject(int steps) { |
| this(steps, null); |
| } |
| |
| /** |
| * Creates new instance of TracerProgressObject with a defined number of |
| * steps and text describing the initial state. |
| * |
| * @param steps number of steps to finish the initialization |
| * @param text text describing the initial state |
| */ |
| public TracerProgressObject(int steps, String text) { |
| if (steps < 1) |
| throw new IllegalArgumentException("steps value must be >= 1: " + steps); // NOI18N |
| |
| this.steps = steps; |
| this.text = text; |
| currentStep = 0; |
| lastStep = 0; |
| listeners = new HashSet(); |
| } |
| |
| |
| /** |
| * Returns number of steps to finish the initialization. |
| * |
| * @return number of steps to finish the initialization |
| */ |
| public synchronized int getSteps() { return steps; } |
| |
| /** |
| * Returns current step of the initialization progress. |
| * |
| * @return current step of the initialization progress |
| */ |
| public synchronized int getCurrentStep() { return currentStep; } |
| |
| /** |
| * Returns text describing the current state or null. |
| * |
| * @return text describing the current state or null |
| */ |
| public synchronized String getText() { return text; } |
| |
| |
| /** |
| * Adds a single step to the current initialization progress. |
| */ |
| public void addStep() { addSteps(1); } |
| |
| /** |
| * Adds a single step to the current initialization progress and changes |
| * the text describing the current state. |
| * |
| * @param text text describing the current state |
| */ |
| public void addStep(String text) { addSteps(1, text); } |
| |
| /** |
| * Adds a number of steps to the current initialization progress. |
| * |
| * @param steps number of steps to be addded to the current initialization progress |
| */ |
| public void addSteps(int steps) { addSteps(steps, text); } |
| |
| /** |
| * Adds a number of steps to the current initialization progress and changes |
| * the text describing the current state. |
| * |
| * @param steps number of steps to be addded to the current initialization progress |
| * @param text text describing the current state |
| */ |
| public synchronized void addSteps(int steps, String text) { |
| if (steps < 0) |
| throw new IllegalArgumentException("steps value must be >= 0: " + steps); // NOI18N |
| if (currentStep + steps > this.steps) |
| throw new IllegalArgumentException("Total steps exceeded: " + // NOI18N |
| (currentStep + steps) + ">" + this.steps); // NOI18N |
| |
| currentStep += steps; |
| this.text = text; |
| fireChange(); |
| } |
| |
| /** |
| * Updates text describing the current state without adding any steps to the |
| * current initialization progress. |
| * |
| * @param text text describing the current state |
| */ |
| public synchronized void setText(String text) { |
| this.text = text; |
| fireChange(); |
| } |
| |
| /** |
| * Adds all remaining steps to finish the initialization progress. |
| */ |
| public synchronized void finish() { |
| if (isFinished()) return; |
| currentStep = steps; |
| fireChange(); |
| } |
| |
| /** |
| * Returns true for a finished TracerProgressObject, false otherwise. |
| * |
| * @return true for a finished TracerProgressObject, false otherwise. |
| */ |
| public synchronized boolean isFinished() { |
| return currentStep == steps; |
| } |
| |
| |
| /** |
| * Adds a listener to receive progress notifications. |
| * |
| * @param l listener to be added |
| */ |
| public synchronized void addListener(Listener l) { listeners.add(l); } |
| |
| /** |
| * Removes a listener receiving progress notifications. |
| * |
| * @param l listener to be removed. |
| */ |
| public synchronized void removeListener(Listener l) { listeners.remove(l); } |
| |
| private void fireChange() { |
| final int currentStepF = currentStep; |
| final int addedStepsF = currentStep - lastStep; |
| final String textF = text; |
| final Set<Listener> toNotify = new HashSet(listeners); |
| SwingUtilities.invokeLater(new Runnable() { |
| public void run() { |
| for (Listener listener : toNotify) |
| listener.progressChanged(addedStepsF, currentStepF, textF); |
| } |
| }); |
| lastStep = currentStep; |
| } |
| |
| |
| /** |
| * Listener to receive notifications about the initialization progress. |
| */ |
| public static interface Listener { |
| |
| /** |
| * Invoked when the progress and/or text describing the current state |
| * changes. |
| * |
| * @param addedSteps new steps added by the change |
| * @param currentStep current step of the initialization progress |
| * @param text text describing the current state |
| */ |
| public void progressChanged(int addedSteps, int currentStep, String text); |
| |
| } |
| |
| } |