| /******************************************************************************* |
| * Copyright (c) 2007, 2017 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 |
| * EclipseSource - ongoing development |
| * Todor Boev |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.p2.metadata; |
| |
| import static org.eclipse.equinox.internal.p2.metadata.InstallableUnit.MEMBER_PROVIDED_CAPABILITIES; |
| import static org.eclipse.equinox.internal.p2.metadata.ProvidedCapability.MEMBER_NAME; |
| import static org.eclipse.equinox.internal.p2.metadata.ProvidedCapability.MEMBER_NAMESPACE; |
| import static org.eclipse.equinox.internal.p2.metadata.ProvidedCapability.MEMBER_VERSION; |
| import static org.eclipse.equinox.p2.metadata.Version.MAX_VERSION; |
| import static org.eclipse.equinox.p2.metadata.VersionRange.emptyRange; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.equinox.p2.metadata.IInstallableUnit; |
| import org.eclipse.equinox.p2.metadata.Version; |
| import org.eclipse.equinox.p2.metadata.VersionRange; |
| import org.eclipse.equinox.p2.metadata.expression.ExpressionUtil; |
| import org.eclipse.equinox.p2.metadata.expression.IExpression; |
| import org.eclipse.equinox.p2.metadata.expression.IExpressionFactory; |
| import org.eclipse.equinox.p2.metadata.expression.IMatchExpression; |
| |
| /** |
| * A required capability represents some external constraint on an {@link IInstallableUnit}. |
| * Each capability represents something an {@link IInstallableUnit} needs that |
| * it expects to be provided by another {@link IInstallableUnit}. Capabilities are |
| * entirely generic, and are intended to be capable of representing anything that |
| * an {@link IInstallableUnit} may need either at install time, or at runtime. |
| * <p> |
| * Capabilities are segmented into namespaces. Anyone can introduce new |
| * capability namespaces. Some well-known namespaces are introduced directly |
| * by the provisioning framework. |
| * |
| * @see IInstallableUnit#NAMESPACE_IU_ID |
| */ |
| public class RequiredCapability extends Requirement implements IRequiredCapability { |
| private static final IExpression ALL = ExpressionUtil.parse( |
| String.format("%s.exists(x | x.%s == $0 && x.%s == $1)", //$NON-NLS-1$ |
| MEMBER_PROVIDED_CAPABILITIES, MEMBER_NAME, MEMBER_NAMESPACE)); |
| |
| private static final IExpression STRICT = ExpressionUtil.parse( |
| String.format("%s.exists(x | x.%s == $0 && x.%s == $1 && x.%s == $2)", //$NON-NLS-1$ |
| MEMBER_PROVIDED_CAPABILITIES, MEMBER_NAME, MEMBER_NAMESPACE, MEMBER_VERSION)); |
| |
| private static final IExpression OPEN_I = ExpressionUtil.parse( |
| String.format("%s.exists(x | x.%s == $0 && x.%s == $1 && x.%s >= $2)", //$NON-NLS-1$ |
| MEMBER_PROVIDED_CAPABILITIES, MEMBER_NAME, MEMBER_NAMESPACE, MEMBER_VERSION)); |
| |
| private static final IExpression OPEN_N = ExpressionUtil.parse( |
| String.format("%s.exists(x | x.%s == $0 && x.%s == $1 && x.%s > $2)", //$NON-NLS-1$ |
| MEMBER_PROVIDED_CAPABILITIES, MEMBER_NAME, MEMBER_NAMESPACE, MEMBER_VERSION)); |
| |
| private static final IExpression CLOSED_II = ExpressionUtil.parse( |
| String.format("%s.exists(x | x.%s == $0 && x.%s == $1 && x.%s >= $2 && x.%s <= $3)", //$NON-NLS-1$ |
| MEMBER_PROVIDED_CAPABILITIES, MEMBER_NAME, MEMBER_NAMESPACE, MEMBER_VERSION, MEMBER_VERSION)); |
| |
| private static final IExpression CLOSED_IN = ExpressionUtil.parse( |
| String.format("%s.exists(x | x.%s == $0 && x.%s == $1 && x.%s >= $2 && x.%s < $3)", //$NON-NLS-1$ |
| MEMBER_PROVIDED_CAPABILITIES, MEMBER_NAME, MEMBER_NAMESPACE, MEMBER_VERSION, MEMBER_VERSION)); |
| |
| private static final IExpression CLOSED_NI = ExpressionUtil.parse( |
| String.format("%s.exists(x | x.%s == $0 && x.%s == $1 && x.%s > $2 && x.%s <= $3)", //$NON-NLS-1$ |
| MEMBER_PROVIDED_CAPABILITIES, MEMBER_NAME, MEMBER_NAMESPACE, MEMBER_VERSION, MEMBER_VERSION)); |
| |
| private static final IExpression CLOSED_NN = ExpressionUtil.parse( |
| String.format("%s.exists(x | x.%s == $0 && x.%s == $1 && x.%s > $2 && x.%s < $3)", //$NON-NLS-1$ |
| MEMBER_PROVIDED_CAPABILITIES, MEMBER_NAME, MEMBER_NAMESPACE, MEMBER_VERSION, MEMBER_VERSION)); |
| |
| private static final List<IExpression> PREDEFINED = Arrays.asList( |
| ALL, STRICT, OPEN_I, OPEN_N, CLOSED_II, CLOSED_IN, CLOSED_NI, CLOSED_NN); |
| |
| /** |
| * TODO Remove. This is a private impl class. Users must call the analogous MetadataFactory.createRequirement() |
| * @deprecated To be removed once CBI is fixed. |
| * @noreference This constructor is not intended to be referenced by clients. |
| */ |
| @Deprecated |
| public RequiredCapability(String namespace, String name, VersionRange range, String filter, boolean optional, boolean multiple) { |
| this(namespace, name, range, filter, optional, multiple, true); |
| } |
| |
| /** |
| * TODO Remove. This is a private impl class. Users must call the analogous MetadataFactory.createRequirement() |
| * @deprecated To be removed once CBI is fixed. |
| * @noreference This constructor is not intended to be referenced by clients. |
| */ |
| @Deprecated |
| public RequiredCapability(String namespace, String name, VersionRange range, String filter, boolean optional, boolean multiple, boolean greedy) { |
| this(namespace, name, range, InstallableUnit.parseFilter(filter), optional ? 0 : 1, multiple ? Integer.MAX_VALUE : 1, greedy, null); |
| } |
| |
| public RequiredCapability(String namespace, String name, VersionRange range, IMatchExpression<IInstallableUnit> filter, int min, int max, boolean greedy, String description) { |
| super(createMatchExpressionFromRange(namespace, name, range), filter, min, max, greedy, description); |
| } |
| |
| @Override |
| public String getNamespace() { |
| return extractNamespace(matchExpression); |
| } |
| |
| @Override |
| public String getName() { |
| return extractName(matchExpression); |
| } |
| |
| @Override |
| public VersionRange getRange() { |
| return extractRange(matchExpression); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder result = new StringBuilder(); |
| |
| result.append(getNamespace()); |
| result.append("; "); //$NON-NLS-1$ |
| result.append(getName()); |
| result.append(" "); //$NON-NLS-1$ |
| result.append(getRange()); |
| |
| return result.toString(); |
| } |
| |
| public static IMatchExpression<IInstallableUnit> createMatchExpressionFromRange(String namespace, String name, VersionRange range) { |
| Assert.isNotNull(namespace); |
| Assert.isNotNull(name); |
| |
| IExpressionFactory factory = ExpressionUtil.getFactory(); |
| |
| // All versions |
| if (range == null || range.equals(emptyRange)) { |
| return factory.matchExpression(ALL, name, namespace); |
| } |
| |
| // Exact version |
| if (range.getMinimum().equals(range.getMaximum())) { |
| return factory.matchExpression(STRICT, name, namespace, range.getMinimum()); |
| } |
| |
| // Open range |
| if (range.getMaximum().equals(MAX_VERSION)) { |
| // Open inclusive or non-inclusive |
| IExpression expr = range.getIncludeMinimum() ? OPEN_I : OPEN_N; |
| return factory.matchExpression(expr, name, namespace, range.getMinimum()); |
| } |
| |
| // Closed range |
| IExpression expr = range.getIncludeMinimum() |
| // Left inclusive. Right inclusive or non-inclusive |
| ? (range.getIncludeMaximum() ? CLOSED_II : CLOSED_IN) |
| // Left non-inclusive. Right inclusive or non-inclusive |
| : (range.getIncludeMaximum() ? CLOSED_NI : CLOSED_NN); |
| return factory.matchExpression(expr, name, namespace, range.getMinimum(), range.getMaximum()); |
| } |
| |
| public static String extractName(IMatchExpression<IInstallableUnit> matchExpression) { |
| assertVersionRangeRequirement(matchExpression); |
| return (String) matchExpression.getParameters()[0]; |
| } |
| |
| public static String extractNamespace(IMatchExpression<IInstallableUnit> matchExpression) { |
| assertVersionRangeRequirement(matchExpression); |
| return (String) matchExpression.getParameters()[1]; |
| } |
| |
| public static VersionRange extractRange(IMatchExpression<IInstallableUnit> matchExpression) { |
| assertVersionRangeRequirement(matchExpression); |
| |
| IExpression expr = ExpressionUtil.getOperand(matchExpression); |
| Object[] params = matchExpression.getParameters(); |
| |
| switch (params.length) { |
| // No version parameter |
| case 2 : |
| return emptyRange; |
| // One version parameter: strict or one of the open ranges |
| case 3 : |
| Version v = (Version) params[2]; |
| if (expr.equals(STRICT)) { |
| return new VersionRange(v, true, v, true); |
| } |
| return new VersionRange(v, expr.equals(OPEN_I), MAX_VERSION, true); |
| // Two version parameters: one of the closed ranges |
| default : |
| Version left = (Version) params[2]; |
| boolean leftInclusive = expr.equals(CLOSED_II) || expr.equals(CLOSED_IN); |
| |
| Version right = (Version) params[3]; |
| boolean rightInclusive = expr.equals(CLOSED_II) || expr.equals(CLOSED_NI); |
| |
| return new VersionRange(left, leftInclusive, right, rightInclusive); |
| } |
| } |
| |
| public static boolean isStrictVersionRequirement(IMatchExpression<IInstallableUnit> matchExpression) { |
| return STRICT == ExpressionUtil.getOperand(matchExpression); |
| } |
| |
| public static boolean isVersionRangeRequirement(IMatchExpression<IInstallableUnit> matchExpression) { |
| return PREDEFINED.contains(ExpressionUtil.getOperand(matchExpression)); |
| } |
| |
| private static void assertVersionRangeRequirement(IMatchExpression<IInstallableUnit> matchExpression) { |
| if (!isVersionRangeRequirement(matchExpression)) { |
| throw new IllegalArgumentException(); |
| } |
| } |
| } |