final Field field = Hoge.class.getField("foo");
        final ParameterizedClassDesc desc = ParameterizedClassDescFactory.createParameterizedClassDesc(field, map);
        assertThat(desc.getRawClass(), is(sameClass(Map.class)));

        final ParameterizedClassDesc[] args = desc.getArguments();
        assertThat(args.length, is(2));

        final ParameterizedClassDesc arg1 = args[0];

import org.codelibs.core.beans.FieldDesc;
import org.codelibs.core.beans.MethodDesc;
import org.codelibs.core.beans.ParameterizedClassDesc;
import org.codelibs.core.beans.PropertyDesc;
import org.codelibs.core.beans.impl.ParameterizedClassDescImpl;
import org.codelibs.core.collection.Indexed;

/**
 * Factory for creating {@link ParameterizedClassDesc} that represents the type of fields, method argument types, and return types.
 * <p>

import org.codelibs.core.beans.ParameterizedClassDesc;

/**
 * Implementation class of {@link ParameterizedClassDesc}.
 *
 * @author koichik
 */
public class ParameterizedClassDescImpl implements ParameterizedClassDesc {

    /** The raw class */
    protected Class<?> rawClass;

    /** An array of {@link ParameterizedClassDesc} representing type arguments */

import java.lang.reflect.TypeVariable;
import java.util.Collection;
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
 */

    }

    @Override
    public boolean isParameterized() {
        return parameterizedClassDesc != null && parameterizedClassDesc.isParameterizedClass();
    }

    @Override
    public ParameterizedClassDesc getParameterizedClassDesc() {
        return parameterizedClassDesc;
    }

    @Override
    public Class<?> getElementClassOfCollection() {

        assertThat(aaa.isParameterized(), is(true));
        final ParameterizedClassDesc parameterizedClassDesc = aaa.getParameterizedClassDesc();
        assertThat(parameterizedClassDesc, is(notNullValue()));
        assertThat(parameterizedClassDesc.isParameterizedClass(), is(true));
        assertThat(parameterizedClassDesc.getRawClass(), is(sameClass(Class.class)));
        final MyBean myBean = new MyBean();

    }

    /**
     * Creates and returns a {@link ParameterizedClassDesc} representing the {@link Type}.
     *
     * @param type
     *            the type
     * @param map
     *            a {@link Map} with type variables as keys and type arguments as values for the parameterized type
     * @return a {@link ParameterizedClassDesc} representing the type
     */

    /**
     * Returns an array of {@link ParameterizedClassDesc} representing the parameter types of the method.
     *
     * @return an array of {@link ParameterizedClassDesc} representing the parameter types of the method
     */
    ParameterizedClassDesc[] getParameterizedClassDescs();

    /**
     * Returns the {@link ParameterizedClassDesc} representing the return type of the method.
     *

     */
    boolean isParameterized(int index);

    /**
     * Returns an array of {@link ParameterizedClassDesc} representing the parameter types of the method.
     *
     * @return An array of {@link ParameterizedClassDesc} representing the parameter types of the method
     */
    ParameterizedClassDesc[] getParameterizedClassDescs();

    /**

     */
    boolean isParameterized();

    /**
     * Returns the {@link ParameterizedClassDesc} that represents the type of the field.
     *
     * @return the {@link ParameterizedClassDesc} that represents the type of the field
     */
    ParameterizedClassDesc getParameterizedClassDesc();

    /**
     * Returns the element type if this field is a parameterized {@link Collection}.