org.n52.matlab.control.link.ClassInfo Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of matlab-control Show documentation
MATLAB Control
The newest version!
package org.n52.matlab.control.link;

/*
 * Copyright (c) 2013, Joshua Kaplan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
 * following conditions are met:
 *  - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
 *    disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
 *    following disclaimer in the documentation and/or other materials provided with the distribution.
 *  - Neither the name of matlabcontrol nor the names of its contributors may be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

/**
 *
 * @since 4.2.0
 * @author Joshua Kaplan
 */
class ClassInfo
{
    private static ConcurrentMap, ClassInfo> CACHE = new ConcurrentHashMap, ClassInfo>();

    static ClassInfo getInfo(Class clazz)
    {
        ClassInfo info = CACHE.get(clazz);
        if(info == null)
        {
            info = new ClassInfo(clazz);
            CACHE.put(clazz, info);
        }

        return info;
    }

    /**
     * The class this information is about
     */
    final Class describedClass;

    /**
     * If the class is either {@code void} or {@code java.lang.Void}
     */
    final boolean isVoid;

    /**
     * If the class is primitive
     */
    final boolean isPrimitive;

    /**
     * If an array type
     */
    final boolean isArray;

    /**
     * If the array's base component type is a primitive
     */
    final boolean isPrimitiveArray;

    /**
     * If the base component type of an array, {@code null} if not an array
     */
    final Class baseComponentType;

    /**
     * The number of array dimensions, {@code 0} if not an array
     */
    final int arrayDimensions;

    /**
     * If the class is one of: {@code byte}, {@code Byte}, {@code short}, {@code Short}, {@code int},
     * {@code Integer}, {@code long}, {@code Long}, {@code float}, {@code Float}, {@code double}, {@code Double}
     */
    final boolean isBuiltinNumeric;

    /**
     * If the class inherits from {@code MatlabType}
     */
    final boolean isMatlabType;

    private ClassInfo(Class clazz)
    {
        describedClass = clazz;

        isPrimitive = clazz.isPrimitive();

        if(clazz.isArray())
        {
            isArray = true;

            int dim = 0;
            Class type = clazz;
            while(type.isArray())
            {
                dim++;
                type = type.getComponentType();
            }

            arrayDimensions = dim;
            baseComponentType = type;
            isPrimitiveArray = type.isPrimitive();
        }
        else
        {
            isArray = false;
            baseComponentType = null;
            isPrimitiveArray = false;
            arrayDimensions = 0;
        }

        isVoid = clazz.equals(Void.class) || clazz.equals(void.class);
        isMatlabType = MatlabType.class.isAssignableFrom(clazz);

        isBuiltinNumeric = clazz.equals(Byte.class)    || clazz.equals(byte.class)  ||
                           clazz.equals(Short.class)   || clazz.equals(short.class) || 
                           clazz.equals(Integer.class) || clazz.equals(int.class)   ||    
                           clazz.equals(Long.class)    || clazz.equals(long.class)  ||
                           clazz.equals(Float.class)   || clazz.equals(float.class) || 
                           clazz.equals(Double.class)  || clazz.equals(double.class);
    }
}