* @see MethodDesc#getParameterizedClassDesc()
 * @see MethodDesc#getParameterizedClassDescs()
 */
public abstract class ParameterizedClassDescFactory {

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

    /**
     * Returns a {@link Map} with type variables as keys and type arguments as values for a parameterized type (class or interface).

     */
    @Test
    public void testFieldType() throws Exception {
        final Map<TypeVariable<?>, Type> map = ParameterizedClassDescFactory.getTypeVariables(Hoge.class);
        final Field field = Hoge.class.getField("foo");
        final ParameterizedClassDesc desc = ParameterizedClassDescFactory.createParameterizedClassDesc(field, map);
        assertThat(desc.getRawClass(), is(sameClass(Map.class)));

import java.util.Map;

import org.codelibs.core.beans.BeanDesc;
import org.codelibs.core.beans.FieldDesc;
import org.codelibs.core.beans.ParameterizedClassDesc;
import org.codelibs.core.beans.factory.ParameterizedClassDescFactory;
import org.codelibs.core.exception.FieldNotStaticRuntimeException;
import org.codelibs.core.lang.FieldUtil;

/**
 * Implementation class of {@link FieldDesc}.
 *
 * @author koichik
 */

import java.util.Map;

import org.codelibs.core.beans.BeanDesc;
import org.codelibs.core.beans.ConstructorDesc;
import org.codelibs.core.beans.ParameterizedClassDesc;
import org.codelibs.core.beans.factory.ParameterizedClassDescFactory;
import org.codelibs.core.lang.ConstructorUtil;

/**
 * Implementation class of {@link ConstructorDesc}.
 *
 * @author koichik
 */
public class ConstructorDescImpl implements ConstructorDesc {

        for (int i = 0; i < parameterTypes.length; ++i) {
            parameterizedClassDescs[i] = ParameterizedClassDescFactory.createParameterizedClassDesc(method, i, beanDesc.getTypeVariables());
        }
        parameterizedClassDesc = ParameterizedClassDescFactory.createParameterizedClassDesc(method, beanDesc.getTypeVariables());
    }

    @Override
    public BeanDesc getBeanDesc() {

            parameterizedClassDesc = ParameterizedClassDescFactory.createParameterizedClassDesc(field, typeVariables);
        } else if (readMethod != null) {
            parameterizedClassDesc = ParameterizedClassDescFactory.createParameterizedClassDesc(readMethod, typeVariables);
        } else if (writeMethod != null) {
            parameterizedClassDesc = ParameterizedClassDescFactory.createParameterizedClassDesc(writeMethod, 0, typeVariables);

- **Resource management** - Proper handling of resources with utilities like `CloseableUtil` and `DisposableUtil`

### Key Architectural Patterns
- **Factory Pattern** - `BeanDescFactory` for creating bean descriptors, `ParameterizedClassDescFactory` for generic type handling
- **Builder Pattern** - `CopyOptions` for configuring bean copying operations with fluent API