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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
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package org.apache.commons.lang3;

import org.apache.commons.lang3.arch.Processor;

import java.util.HashMap;
import java.util.Map;

/**
 * An utility class for the os.arch System Property. The class defines methods for
 * identifying the architecture of the current JVM.
 * 

* Important: The os.arch System Property returns the architecture used by the JVM * not of the operating system. *

* @since 3.6 */ public class ArchUtils { private static final Map ARCH_TO_PROCESSOR; static { ARCH_TO_PROCESSOR = new HashMap<>(); init(); } private static void init() { init_X86_32Bit(); init_X86_64Bit(); init_IA64_32Bit(); init_IA64_64Bit(); init_PPC_32Bit(); init_PPC_64Bit(); } private static void init_X86_32Bit() { final Processor processor = new Processor(Processor.Arch.BIT_32, Processor.Type.X86); addProcessors(processor, "x86", "i386", "i486", "i586", "i686", "pentium"); } private static void init_X86_64Bit() { final Processor processor = new Processor(Processor.Arch.BIT_64, Processor.Type.X86); addProcessors(processor, "x86_64", "amd64", "em64t", "universal"); } private static void init_IA64_32Bit() { final Processor processor = new Processor(Processor.Arch.BIT_32, Processor.Type.IA_64); addProcessors(processor, "ia64_32", "ia64n"); } private static void init_IA64_64Bit() { final Processor processor = new Processor(Processor.Arch.BIT_64, Processor.Type.IA_64); addProcessors(processor, "ia64", "ia64w"); } private static void init_PPC_32Bit() { final Processor processor = new Processor(Processor.Arch.BIT_32, Processor.Type.PPC); addProcessors(processor, "ppc", "power", "powerpc", "power_pc", "power_rs"); } private static void init_PPC_64Bit() { final Processor processor = new Processor(Processor.Arch.BIT_64, Processor.Type.PPC); addProcessors(processor, "ppc64", "power64", "powerpc64", "power_pc64", "power_rs64"); } /** * Adds the given {@link Processor} with the given key {@link String} to the map. * * @param key The key as {@link String}. * @param processor The {@link Processor} to add. * @throws IllegalStateException If the key already exists. */ private static void addProcessor(final String key, final Processor processor) { if (ARCH_TO_PROCESSOR.containsKey(key)) { throw new IllegalStateException("Key " + key + " already exists in processor map"); } ARCH_TO_PROCESSOR.put(key, processor); } /** * Adds the given {@link Processor} with the given keys to the map. * * @param keys The keys. * @param processor The {@link Processor} to add. * @throws IllegalStateException If the key already exists. */ private static void addProcessors(final Processor processor, final String... keys) { for (final String key : keys) { addProcessor(key, processor); } } /** * Returns a {@link Processor} object of the current JVM. * *

* Important: The os.arch System Property returns the architecture used by the JVM * not of the operating system. *

* * @return A {@link Processor} when supported, else null. */ public static Processor getProcessor() { return getProcessor(SystemUtils.OS_ARCH); } /** * Returns a {@link Processor} object the given value {@link String}. The {@link String} must be * like a value returned by the os.arch System Property. * * @param value A {@link String} like a value returned by the os.arch System Property. * @return A {@link Processor} when it exists, else null. */ public static Processor getProcessor(final String value) { return ARCH_TO_PROCESSOR.get(value); } }




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