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

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Here is the source code for org.lunarray.model.descriptor.util.ModelBuilderUtil.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.Collection;

import org.apache.commons.lang.Validate;
import org.lunarray.model.descriptor.model.member.Cardinality;

/**
 * A general utility.
 * 
 * @author Pal Hargitai (pal@lunarray.org)
 */
public enum ModelBuilderUtil {

    /** Instance. */
    INSTANCE;

    /**
     * Resolves a type's cardinality.
     * 
     * @param type
     *            The type. May not be null.
     * @return Single if the type is a primitive, multiple if the type is a
     *         collection, else nullable.
     */
    public static Cardinality resolveCardinality(final Class<?> type) {
        Validate.notNull(type, "Type may not be null.");
        // Get cardinality
        final Cardinality cardinality;
        if (Void.class.equals(type) || Void.TYPE.equals(type)) {
            cardinality = Cardinality.NONE;
        } else if (type.isPrimitive()) {
            cardinality = Cardinality.SINGLE;
        } else if (Collection.class.isAssignableFrom(type)) {
            cardinality = Cardinality.MULTIPLE;
        } else {
            cardinality = Cardinality.NULLABLE;
        }
        return cardinality;
    }
}