| /******************************************************************************* |
| * Copyright (c) 2014 Ericsson |
| * |
| * All rights reserved. This program and the accompanying materials are made |
| * available under the terms of the Eclipse Public License 2.0 which |
| * accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: Matthew Khouzam - Initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.tracecompass.ctf.core.event.scope; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.eclipse.jdt.annotation.NonNull; |
| import org.eclipse.jdt.annotation.Nullable; |
| |
| /** |
| * A node of a lexical scope |
| * |
| * @author Matthew Khouzam |
| */ |
| public class LexicalScope implements ILexicalScope { |
| private int hash = 0; |
| private final @NonNull String fName; |
| private final @NonNull String fPath; |
| private final Map<String, ILexicalScope> fChildren = new ConcurrentHashMap<>(); |
| |
| /** |
| * Hidden constructor for the root node only |
| * |
| * @since 1.0 |
| */ |
| protected LexicalScope() { |
| fPath = ""; //$NON-NLS-1$ |
| fName = ""; //$NON-NLS-1$ |
| } |
| |
| /** |
| * The scope constructor |
| * |
| * @param parent |
| * The parent node, can be null, but shouldn't |
| * @param name |
| * the name of the field |
| * @since 1.0 |
| */ |
| public LexicalScope(ILexicalScope parent, @NonNull String name) { |
| fName = name; |
| fPath = parent.getPath().isEmpty() ? fName : parent.getPath() + '.' + fName; |
| parent.addChild(name, this); |
| } |
| |
| /** |
| * @since 1.0 |
| */ |
| @Override |
| public void addChild(String name, ILexicalScope child) { |
| fChildren.put(name, child); |
| } |
| |
| @Override |
| public @NonNull String getName() { |
| return fName; |
| } |
| |
| /** |
| * @since 1.0 |
| */ |
| @Override |
| public @Nullable ILexicalScope getChild(String name) { |
| return fChildren.get(name); |
| } |
| |
| /** |
| * @since 1.0 |
| */ |
| @Override |
| public @NonNull String getPath() { |
| return fPath; |
| } |
| |
| // for debugging purposes |
| @Override |
| public String toString() { |
| return getPath(); |
| } |
| |
| @Override |
| public synchronized int hashCode() { |
| if (hash == 0) { |
| final int prime = 31; |
| hash = prime * (prime + fName.hashCode()) + fPath.hashCode(); |
| } |
| return hash; |
| } |
| |
| @Override |
| public boolean equals(@Nullable Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| LexicalScope other = (LexicalScope) obj; |
| if (!fName.equals(other.fName)) { |
| return false; |
| } |
| return fPath.equals(other.fPath); |
| } |
| } |