@SuppressWarnings("nullness") // test of a bogus call
  public void testToStringFunction_apply() {
    assertThat(Functions.toStringFunction().apply(3)).isEqualTo("3");
    assertThat(Functions.toStringFunction().apply("hiya")).isEqualTo("hiya");
    assertThat(
            Functions.toStringFunction()
                .apply(
                    new Object() {
                      @Override
                      public String toString() {

  @SuppressWarnings("nullness") // test of a bogus call
  public void testToStringFunction_apply() {
    assertThat(Functions.toStringFunction().apply(3)).isEqualTo("3");
    assertThat(Functions.toStringFunction().apply("hiya")).isEqualTo("hiya");
    assertThat(
            Functions.toStringFunction()
                .apply(
                    new Object() {
                      @Override
                      public String toString() {

import java.util.LinkedHashMap;

import org.codelibs.core.exception.IllegalKeyOfBeanMapException;

/**
 * A map with String keys that throws an exception when accessing (get) a non-existent key.
 *
 * @author higa
 */
public class BeanMap extends LinkedHashMap<String, Object> {

    private static final long serialVersionUID = 1;

    /**
     * Creates a new {@link BeanMap}.
     */
    public BeanMap() {
    }

 */
package org.codelibs.core.exception;

import static org.codelibs.core.collection.ArrayUtil.asArray;

import java.text.ParseException;

/**
 * Exception thrown when parsing fails.
 *
 * @author higa
 */
public class ParseRuntimeException extends ClRuntimeException {

    private static final long serialVersionUID = -5237329676597387063L;

    /**
     * Creates a {@link ParseRuntimeException}.
     *

 * governing permissions and limitations under the License.
 */
package org.codelibs.core.convert;

import junit.framework.TestCase;

/**
 * @author higa
 *
 */
public class IntegerConversionUtilTest extends TestCase {

    /**
     * @throws Exception
     */
    public void testToInteger() throws Exception {

 * governing permissions and limitations under the License.
 */
package org.codelibs.core.exception;

/**
 * Exception thrown when an argument is empty.
 *
 * @author higa
 */
public class EmptyArgumentException extends ClIllegalArgumentException {

    private static final long serialVersionUID = 4625805280526951642L;

    /**
     * Creates an {@link EmptyArgumentException}.
     *

 */
package org.codelibs.core.collection;

import java.util.Iterator;

import org.codelibs.core.exception.ClUnsupportedOperationException;

/**
 * An empty {@link Iterator}.
 *
 * @author higa
 * @param <T> the element type
 */
public class EmptyIterator<T> implements Iterator<T> {

    /**
     * Creates an {@link EmptyIterator}.
     */
    public EmptyIterator() {
    }

    @Override

import static org.codelibs.core.collection.ArrayUtil.asArray;

import java.lang.reflect.InvocationTargetException;

/**
 * Exception that wraps {@link InvocationTargetException}.
 *
 * @author higa
 */
public class InvocationTargetRuntimeException extends ClRuntimeException {

    private static final long serialVersionUID = 7760491787158046906L;

    /**
     * The target class.
     */

 */
package org.codelibs.core.exception;

import static org.codelibs.core.collection.ArrayUtil.asArray;

/**
 * Exception that wraps {@link InstantiationException}.
 *
 * @author higa
 */
public class InstantiationRuntimeException extends ClRuntimeException {

    private static final long serialVersionUID = 5220902071756706607L;

    /**
     * The target class.
     */

 * governing permissions and limitations under the License.
 */
package org.codelibs.core.convert;

import java.math.BigInteger;

/**
 * Utility class for conversions related to {@link BigInteger}.
 *
 * @author higa
 */
public abstract class BigIntegerConversionUtil {

    /**
     * Do not instantiate.
     */
    protected BigIntegerConversionUtil() {
    }

    /**
     * Converts to {@link BigInteger}.