/*
 * 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
 * limitations under the License.
 */
package org.apache.commons.lang3.arch;

/**
 * The {@link Processor} represents a microprocessor and defines some properties
 * like architecture and type of the microprocessor.
 *
 * @since 3.6
 */
public class Processor {

	/**
	 * The {@link Arch} enum defines the architecture of a microprocessor. The
	 * architecture represents the bit value of the microprocessor. The following
	 * architectures are defined:
	 * <ul>
	 * <li>32-bit</li>
	 * <li>64-bit</li>
	 * <li>Unknown</li>
	 * </ul>
	 */
	public enum Arch {

		/**
		 * A 32-bit processor architecture.
		 */
		BIT_32("32-bit"),

		/**
		 * A 64-bit processor architecture.
		 */
		BIT_64("64-bit"),

		/**
		 * An unknown-bit processor architecture.
		 */
		UNKNOWN("Unknown");

		/**
		 * A label suitable for display.
		 *
		 * @since 3.10
		 */
		private final String label;

		Arch(final String label) {
			this.label = label;
		}

		/**
		 * Gets the label suitable for display.
		 *
		 * @return the label.
		 */
		public String getLabel() {
			return label;
		}
	}

	/**
	 * The {@link Type} enum defines types of a microprocessor. The following types
	 * are defined:
	 * <ul>
	 * <li>x86</li>
	 * <li>ia64</li>
	 * <li>PPC</li>
	 * <li>Unknown</li>
	 * </ul>
	 */
	public enum Type {

		/**
		 * Intel x86 series of instruction set architectures.
		 */
		X86,

		/**
		 * Intel Itanium 64-bit architecture.
		 */
		IA_64,

		/**
		 * Apple–IBM–Motorola PowerPC architecture.
		 */
		PPC,

		/**
		 * Unknown architecture.
		 */
		UNKNOWN
	}

	private final Arch arch;
	private final Type type;

	/**
	 * Constructs a {@link Processor} object with the given parameters.
	 *
	 * @param arch The processor architecture.
	 * @param type The processor type.
	 */
	public Processor(final Arch arch, final Type type) {
		this.arch = arch;
		this.type = type;
	}

	/**
	 * Returns the processor architecture as an {@link Arch} enum. The processor
	 * architecture defines, if the processor has a 32 or 64 bit architecture.
	 *
	 * @return A {@link Arch} enum.
	 */
	public Arch getArch() {
		return arch;
	}

	/**
	 * Returns the processor type as {@link Type} enum. The processor type defines,
	 * if the processor is for example a x86 or PPA.
	 *
	 * @return A {@link Type} enum.
	 */
	public Type getType() {
		return type;
	}

	/**
	 * Checks if {@link Processor} is 32 bit.
	 *
	 * @return {@code true}, if {@link Processor} is {@link Arch#BIT_32}, else
	 *         {@code false}.
	 */
	public boolean is32Bit() {
		return Arch.BIT_32 == arch;
	}

	/**
	 * Checks if {@link Processor} is 64 bit.
	 *
	 * @return {@code true}, if {@link Processor} is {@link Arch#BIT_64}, else
	 *         {@code false}.
	 */
	public boolean is64Bit() {
		return Arch.BIT_64 == arch;
	}

	/**
	 * Checks if {@link Processor} is type of Intel Itanium.
	 *
	 * @return {@code true}. if {@link Processor} is {@link Type#IA_64}, else
	 *         {@code false}.
	 */
	public boolean isIA64() {
		return Type.IA_64 == type;
	}

	/**
	 * Checks if {@link Processor} is type of Power PC.
	 *
	 * @return {@code true}. if {@link Processor} is {@link Type#PPC}, else
	 *         {@code false}.
	 */
	public boolean isPPC() {
		return Type.PPC == type;
	}

	/**
	 * Checks if {@link Processor} is type of x86.
	 *
	 * @return {@code true}, if {@link Processor} is {@link Type#X86}, else
	 *         {@code false}.
	 */
	public boolean isX86() {
		return Type.X86 == type;
	}

}
