EnumAttributeValue.java

package org.springframework.roo.classpath.details.annotations;

import org.apache.commons.lang3.Validate;
import org.springframework.roo.model.EnumDetails;
import org.springframework.roo.model.JavaSymbolName;

/**
 * Represents an enumeration annotation attribute value.
 * <p>
 * Source code parsers should treat any non-quoted string NOT ending in ".class"
 * as an enumeration, using the segment appearing after the final period in the
 * string as the field name. Anything to the left of that final period is
 * treated as representing the enumeration type, and normal package resolution
 * techniques should be used to resolve the enumeration type.
 *
 * @author Ben Alex
 * @since 1.0
 */
public class EnumAttributeValue extends AbstractAnnotationAttributeValue<EnumDetails> {
  private final EnumDetails value;

  public EnumAttributeValue(final JavaSymbolName name, final EnumDetails value) {
    super(name);
    Validate.notNull(value, "Value required");
    this.value = value;
  }

  /**
   * @return value as enum
   * @throws ClassNotFoundException if enum class isn't in current ClassLoader
   * @see #getAsEnum(Object)
   */
  @SuppressWarnings("all")
  public Enum<?> getAsEnum() throws ClassNotFoundException {
    final Class<?> enumType =
        getClass().getClassLoader().loadClass(value.getType().getFullyQualifiedTypeName());
    Validate.isTrue(enumType.isEnum(), "Should have obtained an Enum but failed for type '%s'",
        enumType.getName());
    final String name = value.getField().getSymbolName();
    return Enum.valueOf((Class<? extends Enum>) enumType, name);
  }

  /**
   * @param target target object
   * @return value as enum using target object ClassLoader to get enum class
   * @throws ClassNotFoundException
   */
  @SuppressWarnings("all")
  public Enum<?> getAsEnum(Object target) throws ClassNotFoundException {
    final Class<?> enumType =
        target.getClass().getClassLoader().loadClass(value.getType().getFullyQualifiedTypeName());
    Validate.isTrue(enumType.isEnum(), "Should have obtained an Enum but failed for type '%s'",
        enumType.getName());
    final String name = value.getField().getSymbolName();
    return Enum.valueOf((Class<? extends Enum>) enumType, name);
  }


  public EnumDetails getValue() {
    return value;
  }

  @Override
  public String toString() {
    return getName() + " -> " + value.toString();
  }
}