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/**
 * Redistribution and use of this software and associated documentation ("Software"), with or
 * without modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright statements and notices. Redistributions
 * must also contain a copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided with
 * the distribution.
 *
 * 3. The name "Exolab" must not be used to endorse or promote products derived from this Software
 * without prior written permission of Intalio, Inc. For written permission, please contact
 * [email protected].
 *
 * 4. Products derived from this Software may not be called "Exolab" nor may "Exolab" appear in
 * their names without prior written permission of Intalio, Inc. Exolab is a registered trademark of
 * Intalio, Inc.
 *
 * 5. Due credit should be given to the Exolab Project (http://www.exolab.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESSED OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTALIO, INC. OR ITS
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 2001-2002 (C) Intalio, Inc. All Rights Reserved.
 *
 * $Id: JAnnotatedElementHelper
 */
package org.exolab.javasource;

import java.util.Iterator;
import java.util.LinkedHashMap;

/**
 * Implements JAnnotatedElement interface on behalf of other classes in this package that implement
 * this interface.
 *
 * @author Andrew Fawcett
 * @version $Revision$ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $
 */
public class JAnnotatedElementHelper implements JAnnotatedElement {

  /**
   * Stores annotations associated with the source element containing this helper.
   */
  private LinkedHashMap _annotations =
      new LinkedHashMap();

  /**
   * Creates a JAnnodatedElementHelper.
   */
  public JAnnotatedElementHelper() {
    super();
  }

  /**
   * {@inheritDoc}
   */
  public final JAnnotation getAnnotation(final JAnnotationType annotationType) {
    if (_annotations == null) {
      return null;
    }
    return _annotations.get(annotationType.getName());
  }

  /**
   * {@inheritDoc}
   */
  public final JAnnotation[] getAnnotations() {
    return _annotations.values().toArray(new JAnnotation[_annotations.size()]);
  }

  /**
   * {@inheritDoc}
   */
  public final boolean isAnnotationPresent(final JAnnotationType annotationType) {
    return _annotations.containsKey(annotationType.getName());
  }

  /**
   * {@inheritDoc}
   */
  public final void addAnnotation(final JAnnotation annotation) {
    if (isAnnotationPresent(annotation.getAnnotationType())) {
      throw new IllegalArgumentException(
          "Annotation for '" + annotation.getAnnotationType().getName() + "' already added.");
    }
    String annotationType = annotation.getAnnotationType().getName();
    _annotations.put(annotationType, annotation);
  }

  /**
   * {@inheritDoc}
   */
  public final JAnnotation removeAnnotation(final JAnnotationType annotationType) {
    if (!isAnnotationPresent(annotationType)) {
      throw new IllegalArgumentException(
          "Annotation for '" + annotationType.getName() + "' not present.");
    }
    return _annotations.remove(annotationType.getName());
  }

  /**
   * {@inheritDoc}
   */
  public final boolean hasAnnotations() {
    return !_annotations.isEmpty();
  }

  /**
   * Outputs the list of annotations maintained by this object.
   *
   * @param jsw the JSourceWriter to print the annotations to
   * @return true if at least one annotation was printed, false otherwise.
   */
  public final boolean printAnnotations(final JSourceWriter jsw) {
    boolean printed = false;
    Iterator annotations = _annotations.values().iterator();
    while (annotations.hasNext()) {
      JAnnotation annotation = annotations.next();
      annotation.print(jsw);
      jsw.writeln();
      printed = true;
    }
    return printed;
  }

}