/**
 * Converter for dates.
 *
 * @author higa
 */
public class DateConverter implements Converter {

    /**
     * The date pattern.
     */
    protected String pattern;

    /**
     * Constructs an instance.
     *
     * @param pattern
     *            the date pattern
     */
    public DateConverter(final String pattern) {
        assertArgumentNotEmpty("pattern", pattern);

 *
 */
public class DateConverterTest {

    /**
     * @throws Exception
     */
    @Test
    public void testGetAsObjectAndGetAsString() throws Exception {
        final DateConverter converter = new DateConverter("yyyy/MM/dd");
        final Date result = (Date) converter.getAsObject("2008/01/16");
        System.out.println(result);
        assertThat(converter.getAsString(result), is("2008/01/16"));
    }

     * @return A {@link CopyOptions} with a date converter applied.
     * @see CopyOptions#dateConverter(String, CharSequence...)
     * @see DateConverter
     */
    public static CopyOptions dateConverter(final String pattern, final CharSequence... propertyNames) {
        return new CopyOptions().dateConverter(pattern, propertyNames);
    }

    /**

     * @return This instance itself
     * @see DateConverter
     */
    public CopyOptions dateConverter(final String pattern, final CharSequence... propertyNames) {
        assertArgumentNotEmpty("pattern", pattern);

        return converter(new DateConverter(pattern), propertyNames);
    }

    /**
     * Sets a converter for SQL dates.
     *

                    copyBeanToBean(entity, form,
                            copyOp -> copyOp.exclude(Constants.PERMISSIONS, EXPIRED_TIME)
                                    .excludeNull()
                                    .dateConverter(Constants.DEFAULT_DATETIME_FORMAT, EXPIRES));
                    final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();

import static org.hamcrest.CoreMatchers.sameInstance;
import static org.junit.Assert.assertThat;

import java.sql.Time;
import java.sql.Timestamp;
import java.util.Date;

import org.codelibs.core.beans.converter.DateConverter;
import org.codelibs.core.beans.converter.NumberConverter;
import org.codelibs.core.exception.ConverterRuntimeException;
import org.junit.Test;

/**
 * @author higa
 */
public class CopyOptionsTest {

        copyBeanToBean(entity, body,
                copyOp -> copyOp.exclude(Constants.PERMISSIONS, AdminAccesstokenAction.EXPIRED_TIME)
                        .excludeNull()
                        .dateConverter(Constants.DEFAULT_DATETIME_FORMAT, AdminAccesstokenAction.EXPIRES));
        final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();
        body.permissions = stream(entity.getPermissions()).get(

CopyOptions options = new CopyOptions()
    .exclude("password", "internalId")      // Exclude specific fields
    .includeNull(false)                     // Skip null values
    .converter("dateField", new DateConverter("yyyy-MM-dd"));

BeanUtil.copyBeanToBean(source, dest, options);
```

## 🤝 Contributing

We welcome contributions! Please see our contributing guidelines for details.

### Development Workflow

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;

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

import org.codelibs.core.beans.converter.DateConverter;
import org.codelibs.core.beans.converter.NumberConverter;
import org.codelibs.core.exception.NullArgumentException;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

/**

 *
 * copyBeanToBean(srcBean, destBean, excludeNull());
 * </pre>
 * <p>
 * Multiple options can also be specified using method chaining.
 * </p>
 *
 * <pre>
 * copyBeanToBean(srcBean, destBean, excludeNull().dateConverter("date", "MM/dd"));
 * </pre>
 *
 * @author Kimura Satoshi
 * @author higa
 * @author shinsuke
 * @see CopyOptionsUtil
 * @see CopyOptions
 */
public abstract class BeanUtil {

    /**