| /******************************************************************************* |
| * Copyright (c) 2007 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.p2.engine; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.SubMonitor; |
| import org.eclipse.equinox.p2.core.helpers.MultiStatus; |
| |
| public abstract class PhaseSet { |
| private final Phase[] phases; |
| |
| public PhaseSet(Phase[] phases) { |
| if (phases == null) |
| throw new IllegalArgumentException("Phases must not be null"); //$NON-NLS-1$ |
| |
| this.phases = phases; |
| } |
| |
| public final MultiStatus perform(EngineSession session, Profile profile, Operand[] deltas, IProgressMonitor monitor) { |
| MultiStatus result = new MultiStatus(); |
| int[] weights = getProgressWeights(deltas); |
| int totalWork = getTotalWork(weights); |
| SubMonitor pm = SubMonitor.convert(monitor, totalWork); |
| try { |
| for (int i = 0; i < phases.length; i++) { |
| if (pm.isCanceled()) { |
| result.setCanceled(); |
| return result; |
| } |
| Phase phase = phases[i]; |
| result.add(phase.perform(session, profile, deltas, pm.newChild(weights[i]))); |
| if (result.isErrorOrCancel()) |
| return result; |
| } |
| } finally { |
| pm.done(); |
| } |
| return result; |
| } |
| |
| private int getTotalWork(int[] weights) { |
| int sum = 0; |
| for (int i = 0; i < weights.length; i++) |
| sum += weights[i]; |
| return sum; |
| } |
| |
| private int[] getProgressWeights(Operand[] operands) { |
| int[] weights = new int[phases.length]; |
| for (int i = 0; i < phases.length; i += 1) { |
| //alter weights according to the number of operands applicable to that phase |
| weights[i] = phases[i].weight * (countApplicable(phases[i], operands) / operands.length); |
| } |
| return weights; |
| } |
| |
| private int countApplicable(Phase phase, Operand[] operands) { |
| int count = 0; |
| for (int i = 0; i < operands.length; i++) { |
| if (phase.isApplicable(operands[i])) |
| count++; |
| } |
| return count; |
| } |
| } |