org.lunarray.model.descriptor.util.PrimitiveUtil.java Source code

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Here is the source code for org.lunarray.model.descriptor.util.PrimitiveUtil.java

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/* 
 * Model Tools.
 * Copyright (C) 2013 Pal Hargitai (pal@lunarray.org)
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program 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 Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.lunarray.model.descriptor.util;

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

import org.apache.commons.lang.Validate;

/**
 * A utility to handle primitives.
 * 
 * @author Pal Hargitai (pal@lunarray.org)
 */
public enum PrimitiveUtil {
    /** The util instance. */
    INSTANCE;

    /**
     * Gets the object type associated with the primitive type.
     * 
     * @param primitiveType
     *            The primitive type. May not be null.
     * @return The object type or null.
     */
    public static Class<?> getObjectType(final Class<?> primitiveType) {
        Validate.notNull(primitiveType, "May not be null.");
        return INSTANCE.innerGetObjectType(primitiveType);
    }

    /** Map describing the relation from primitives to classes. */
    private Map<Class<?>, Class<?>> primitivesToClasses;

    /**
     * Default constructor.
     */
    private PrimitiveUtil() {
        this.primitivesToClasses = new HashMap<Class<?>, Class<?>>();
        this.primitivesToClasses.put(Byte.TYPE, Byte.class);
        this.primitivesToClasses.put(Integer.TYPE, Integer.class);
        this.primitivesToClasses.put(Double.TYPE, Double.class);
        this.primitivesToClasses.put(Float.TYPE, Float.class);
        this.primitivesToClasses.put(Long.TYPE, Long.class);
        this.primitivesToClasses.put(Short.TYPE, Short.class);
        this.primitivesToClasses.put(Character.TYPE, Character.class);
        this.primitivesToClasses.put(Boolean.TYPE, Boolean.class);
    }

    /**
     * Gets the object type associated with the primitive type.
     * 
     * @param primitiveType
     *            The primitive type.
     * @return The object type or null.
     */
    private Class<?> innerGetObjectType(final Class<?> primitiveType) {
        Class<?> result = null;
        if (this.primitivesToClasses.containsKey(primitiveType)) {
            result = this.primitivesToClasses.get(primitiveType);
        }
        return result;
    }
}