/**
     * Constructs an instance.
     *
     * @param beanDesc
     *            The {@link BeanDesc} of the class that owns this method. Must not be {@literal null}.
     * @param method
     *            The method. Must not be {@literal null}.
     */
    public MethodDescImpl(final BeanDesc beanDesc, final Method method) {
        assertArgumentNotNull("beanDesc", beanDesc);
        assertArgumentNotNull("method", method);

     *            The setter method.
     * @param beanDesc
     *            The {@link BeanDesc}. Must not be {@literal null}.
     */
    public PropertyDescImpl(final String propertyName, final Class<?> propertyType, final Method readMethod, final Method writeMethod,
            final BeanDesc beanDesc) {
        this(propertyName, propertyType, readMethod, writeMethod, null, beanDesc);
    }

    /**

    }

    /**
     * @throws Exception
     */
    @Test
    public void testClear() throws Exception {
        final BeanDesc beanDesc = BeanDescFactory.getBeanDesc(MyBean.class);
        BeanDescFactory.clear();
        assertThat(BeanDescFactory.getBeanDesc(MyBean.class), is(not(sameInstance(beanDesc))));
    }

    /**
     *
     */
    public static class MyBean {

        /**

/**
 * Interface for handling constructors.
 *
 * @author koichik
 */
public interface ConstructorDesc {

    /**
     * Returns the {@link BeanDesc} of the class that owns this constructor.
     *
     * @return {@link BeanDesc}
     */
    BeanDesc getBeanDesc();

    /**
     * Returns the constructor.
     *
     * @param <T>
     *            The type of the Bean
     * @return The constructor

import java.util.Map;

/**
 * Interface for handling fields.
 *
 * @author koichik
 */
public interface FieldDesc {

    /**
     * Returns the {@link BeanDesc} of the class that owns this field.
     *
     * @return {@link BeanDesc}
     */
    BeanDesc getBeanDesc();

    /**
     * Returns the field.
     *
     * @return the field
     */
    Field getField();

    /**

     *            the value to be converted
     * @return the converted value
     */
    <T> T convertIfNeed(Object value);

    /**
     * Returns the {@link BeanDesc}.
     *
     * @return the {@link BeanDesc}
     */
    BeanDesc getBeanDesc();

    /**
     * Returns {@literal true} if this property is parameterized.
     *
     * @return {@literal true} if this property is parameterized
     */

 * <p>
 * This class does not cache instances of {@link ParameterizedClassDesc}. Please obtain {@link ParameterizedClassDesc} via {@link BeanDesc}.
 * </p>
 *
 * @author koichik
 * @see BeanDesc#getTypeVariables()
 * @see PropertyDesc#getParameterizedClassDesc()
 * @see FieldDesc#getParameterizedClassDesc()
 * @see ConstructorDesc#getParameterizedClassDescs()

import java.util.Map;

/**
 * Interface for handling methods.
 *
 * @author koichik
 */
public interface MethodDesc {

    /**
     * Returns the {@link BeanDesc} of the class that owns this method.
     *
     * @return {@link BeanDesc}
     */
    BeanDesc getBeanDesc();

    /**
     * Returns the method.
     *
     * @return the method
     */
    Method getMethod();

    /**

import org.codelibs.core.beans.factory.BeanDescFactory;
import org.codelibs.core.beans.util.BeanUtil;
import org.codelibs.core.beans.util.CopyOptions;

// Bean metadata introspection
BeanDesc beanDesc = BeanDescFactory.getBeanDesc(MyBean.class);
PropertyDesc nameProperty = beanDesc.getPropertyDesc("name");
nameProperty.setValue(bean, "John Doe");

// Bean copying with flexible options
BeanUtil.copyBeanToBean(source, destination);

import org.codelibs.core.lang.ClassUtil;
import org.codelibs.core.lang.FieldUtil;
import org.codelibs.core.lang.StringUtil;

/**
 * Implementation class of {@link BeanDesc}.
 *
 * @author higa
 */
public class BeanDescImpl implements BeanDesc {

    /** Empty object array */
    protected static final Object[] EMPTY_ARGS = new Object[0];

    /** Empty class array */