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Java example source code file (Namespace.java)
The Namespace.java Java example source code/* * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package jdk.nashorn.internal.codegen; import java.util.HashMap; /** * A name space hierarchy, where each level holds a name directory with * names that may be unique for each level. */ public class Namespace { /** Parent namespace. */ private final Namespace parent; /** Name directory - version count for each name */ private final HashMap<String, Integer> directory; /** * Constructor */ public Namespace() { this(null); } /** * Constructor * * @param parent parent name space */ public Namespace(final Namespace parent) { this.parent = parent; this.directory = new HashMap<>(); } /** * Return the parent Namespace of this space. * * @return parent name space */ public Namespace getParent() { return parent; } /** * Create a uniqueName name in the namespace in the form base$n where n varies * . * @param base Base of name. Base will be returned if uniqueName. * * @return Generated uniqueName name. */ public String uniqueName(final String base) { for (Namespace namespace = this; namespace != null; namespace = namespace.getParent()) { final HashMap<String, Integer> namespaceDirectory = namespace.directory; final Integer counter = namespaceDirectory.get(base); if (counter != null) { final int count = counter + 1; namespaceDirectory.put(base, count); return base + '-' + count; } } directory.put(base, 0); return base; } @Override public String toString() { return directory.toString(); } } Other Java examples (source code examples)Here is a short list of links related to this Java Namespace.java source code file: |
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