| /******************************************************************************* |
| * Copyright (c) 2009, 2018 Mountainminds GmbH & Co. KG and Contributors |
| * 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: |
| * Marc R. Hoffmann - initial API and implementation |
| * |
| *******************************************************************************/ |
| package org.jacoco.core.internal.analysis; |
| |
| import org.jacoco.core.analysis.ICounter; |
| import org.jacoco.core.analysis.ILine; |
| |
| /** |
| * Implementation of {@link ILine}. |
| */ |
| public abstract class LineImpl implements ILine { |
| |
| /** Max instruction counter value for which singletons are created */ |
| private static final int SINGLETON_INS_LIMIT = 8; |
| |
| /** Max branch counter value for which singletons are created */ |
| private static final int SINGLETON_BRA_LIMIT = 4; |
| |
| private static final LineImpl[][][][] SINGLETONS = new LineImpl[SINGLETON_INS_LIMIT + 1][][][]; |
| |
| static { |
| for (int i = 0; i <= SINGLETON_INS_LIMIT; i++) { |
| SINGLETONS[i] = new LineImpl[SINGLETON_INS_LIMIT + 1][][]; |
| for (int j = 0; j <= SINGLETON_INS_LIMIT; j++) { |
| SINGLETONS[i][j] = new LineImpl[SINGLETON_BRA_LIMIT + 1][]; |
| for (int k = 0; k <= SINGLETON_BRA_LIMIT; k++) { |
| SINGLETONS[i][j][k] = new LineImpl[SINGLETON_BRA_LIMIT + 1]; |
| for (int l = 0; l <= SINGLETON_BRA_LIMIT; l++) { |
| SINGLETONS[i][j][k][l] = new Fix(i, j, k, l); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Empty line without instructions or branches. |
| */ |
| public static final LineImpl EMPTY = SINGLETONS[0][0][0][0]; |
| |
| private static LineImpl getInstance(final CounterImpl instructions, |
| final CounterImpl branches) { |
| final int im = instructions.getMissedCount(); |
| final int ic = instructions.getCoveredCount(); |
| final int bm = branches.getMissedCount(); |
| final int bc = branches.getCoveredCount(); |
| if (im <= SINGLETON_INS_LIMIT && ic <= SINGLETON_INS_LIMIT |
| && bm <= SINGLETON_BRA_LIMIT && bc <= SINGLETON_BRA_LIMIT) { |
| return SINGLETONS[im][ic][bm][bc]; |
| } |
| return new Var(instructions, branches); |
| } |
| |
| /** |
| * Mutable version. |
| */ |
| private static final class Var extends LineImpl { |
| Var(final CounterImpl instructions, final CounterImpl branches) { |
| super(instructions, branches); |
| } |
| |
| @Override |
| public LineImpl increment(final ICounter instructions, |
| final ICounter branches) { |
| this.instructions = this.instructions.increment(instructions); |
| this.branches = this.branches.increment(branches); |
| return this; |
| } |
| } |
| |
| /** |
| * Immutable version. |
| */ |
| private static final class Fix extends LineImpl { |
| public Fix(final int im, final int ic, final int bm, final int bc) { |
| super(CounterImpl.getInstance(im, ic), CounterImpl.getInstance(bm, |
| bc)); |
| } |
| |
| @Override |
| public LineImpl increment(final ICounter instructions, |
| final ICounter branches) { |
| return getInstance(this.instructions.increment(instructions), |
| this.branches.increment(branches)); |
| } |
| } |
| |
| /** instruction counter */ |
| protected CounterImpl instructions; |
| |
| /** branch counter */ |
| protected CounterImpl branches; |
| |
| private LineImpl(final CounterImpl instructions, final CounterImpl branches) { |
| this.instructions = instructions; |
| this.branches = branches; |
| } |
| |
| /** |
| * Adds the given counters to this line. |
| * |
| * @param instructions |
| * instructions to add |
| * @param branches |
| * branches to add |
| * @return instance with new counter values |
| */ |
| public abstract LineImpl increment(final ICounter instructions, |
| final ICounter branches); |
| |
| // === ILine implementation === |
| |
| public int getStatus() { |
| return instructions.getStatus() | branches.getStatus(); |
| } |
| |
| public ICounter getInstructionCounter() { |
| return instructions; |
| } |
| |
| public ICounter getBranchCounter() { |
| return branches; |
| } |
| |
| @Override |
| public int hashCode() { |
| return 23 * instructions.hashCode() ^ branches.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(final Object obj) { |
| if (obj instanceof ILine) { |
| final ILine that = (ILine) obj; |
| return this.instructions.equals(that.getInstructionCounter()) |
| && this.branches.equals(that.getBranchCounter()); |
| } |
| return false; |
| } |
| |
| } |