| /*=============================================================================# |
| # Copyright (c) 2008, 2020 Stephan Wahlbrink and others. |
| # |
| # This program and the accompanying materials are made available under the |
| # terms of the Eclipse Public License 2.0 which is available at |
| # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0 |
| # which is available at https://www.apache.org/licenses/LICENSE-2.0. |
| # |
| # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 |
| # |
| # Contributors: |
| # Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation |
| #=============================================================================*/ |
| |
| package org.eclipse.statet.r.core.model; |
| |
| import java.util.Comparator; |
| import java.util.List; |
| |
| import org.eclipse.statet.jcommons.collections.ImList; |
| import org.eclipse.statet.jcommons.lang.NonNull; |
| import org.eclipse.statet.jcommons.lang.NonNullByDefault; |
| import org.eclipse.statet.jcommons.lang.Nullable; |
| |
| import org.eclipse.statet.r.core.rsource.ast.RAstNode; |
| |
| |
| /** |
| * Access of a variable of class in source code |
| * |
| * Is created by code analysis, not indent to implement by clients. |
| */ |
| @NonNullByDefault |
| public abstract class RElementAccess extends RElementName { |
| |
| |
| public static final Comparator<RElementAccess> NAME_POSITION_COMPARATOR= |
| new Comparator<RElementAccess>() { |
| private int comparePosition(final @Nullable RAstNode node1, final @Nullable RAstNode node2) { |
| if (node1 == node2) { |
| return 0; |
| } |
| if (node1 == null) { |
| return -1; |
| } |
| if (node2 == null) { |
| return 1; |
| } |
| return Integer.compare(node1.getStartOffset(), node2.getStartOffset()); |
| } |
| @Override |
| public int compare(final RElementAccess o1, final RElementAccess o2) { |
| if (o1 == o2) { |
| return 0; |
| } |
| RElementAccess segment1= o1; |
| RElementAccess segment2= o2; |
| int offset; |
| while ((offset= comparePosition(segment1.getNameNode(), segment2.getNameNode())) == 0) { |
| segment1= o1.getNextSegment(); |
| segment2= o2.getNextSegment(); |
| if (segment1 == segment2) { |
| return 0; |
| } |
| if (segment1 == null) { |
| return -1; |
| } |
| if (segment2 == null) { |
| return 1; |
| } |
| } |
| return offset; |
| } |
| }; |
| |
| public static @Nullable RElementAccess getMainElementAccessOfNameNode(final RAstNode nameNode) { |
| RAstNode node= nameNode; |
| while (node != null) { |
| final List<Object> attachments= node.getAttachments(); |
| for (final Object attachment : attachments) { |
| if (attachment instanceof RElementAccess) { |
| RElementAccess access= (RElementAccess)attachment; |
| do { |
| if (access.isMaster() && access.getNameNode() == nameNode) { |
| return (RElementAccess)attachment; |
| } |
| access= access.getNextSegment(); |
| } while (access != null); |
| } |
| } |
| node= node.getRParent(); |
| } |
| return null; |
| } |
| |
| public static @Nullable RElementAccess getElementAccessOfNameNode(final RAstNode nameNode) { |
| RAstNode node= nameNode; |
| while (node != null) { |
| final List<Object> attachments= node.getAttachments(); |
| for (final Object attachment : attachments) { |
| if (attachment instanceof RElementAccess) { |
| RElementAccess access= (RElementAccess)attachment; |
| do { |
| if (access.isMaster() && access.getNameNode() == nameNode) { |
| return access; |
| } |
| access= access.getNextSegment(); |
| } while (access != null); |
| } |
| } |
| node= node.getRParent(); |
| } |
| return null; |
| } |
| |
| |
| public abstract RFrame getFrame(); |
| |
| public abstract boolean isWriteAccess(); |
| public abstract boolean isFunctionAccess(); |
| public abstract boolean isCallAccess(); |
| |
| |
| public boolean isMaster() { |
| return true; |
| } |
| |
| public boolean isSlave() { |
| return false; |
| } |
| |
| public RElementAccess getMaster() { |
| return this; |
| } |
| |
| |
| public abstract RAstNode getNode(); |
| |
| public abstract @Nullable RAstNode getNameNode(); |
| |
| @Override |
| public abstract @Nullable RElementAccess getNextSegment(); |
| |
| @Override |
| public RElementAccess getLastSegment() { |
| @NonNull RElementAccess lastSegment; |
| RElementAccess nextSegment= this; |
| do { |
| lastSegment= nextSegment; |
| } while ((nextSegment= nextSegment.getNextSegment()) != null); |
| return lastSegment; |
| } |
| |
| public abstract ImList<? extends RElementAccess> getAllInUnit(final boolean includeSlaves); |
| |
| } |