org.coode.oppl.utils.ArgCheck Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of oppl2-oppl2 Show documentation

There is a newer version: 5.0.0

package org.coode.oppl.utils;

/** @author Luigi Iannone */
public class ArgCheck {
    /** @param o
     *            o
     * @param name
     *            name
     * @param 
     *            type
     * @return the input, if not null, illegal argument exception otherwise */
    public static  T checkNotNull(T o, String name) {
        if (o == null) {
            throw new IllegalArgumentException(name + " cannot be null");
        }
        if (o instanceof Iterable) {
            int i = 0;
            for (Object obj : (Iterable) o) {
                if (obj == null) {
                    throw new IllegalArgumentException(name
                            + " cannot contain nulls, but contains a null at position: "
                            + i);
                }
                i++;
            }
        }
        return o;
    }

    /** @param o
     *            o
     * @param 
     *            type
     * @return the input, if not null, illegal argument exception otherwise */
    public static  T checkNotNull(T o) {
        return checkNotNull(o, "the object");
    }
}