JdkJavaTypeTest.java

package org.springframework.roo.model;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

import org.junit.Test;

/**
 * Unit test of {@link JdkJavaType}
 * 
 * @author Andrew Swan
 * @since 1.2.0
 */
public class JdkJavaTypeTest {

  /**
   * Asserts that the given {@link JavaType} represents a valid JDK type
   * 
   * @param javaType
   * @throws Exception
   */
  private void assertValidJdkType(final JavaType javaType) throws Exception {
    Class.forName(javaType.getFullyQualifiedTypeName());
  }

  /**
   * Indicates whether the given field is a public constant
   * 
   * @param field the field to check (required)
   * @return see above
   */
  private boolean isPublicConstant(final Field field) {
    final int modifiers = field.getModifiers();
    return Modifier.isPublic(modifiers) && Modifier.isStatic(modifiers)
        && Modifier.isFinal(modifiers);
  }

  @Test
  public void testClassNamesAreActualJdkTypes() throws Exception {
    for (final Field field : JdkJavaType.class.getDeclaredFields()) {
      if (isPublicConstant(field) && JavaType.class.equals(field.getType())) {
        assertValidJdkType((JavaType) field.get(null));
      }
    }
  }
}