/*
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
    *
    * Unless required by applicable law or agreed to in writing, software
    * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.commons.classscan.bcel;
  
  import java.util.Set;
  
  import org.apache.bcel.classfile.AnnotationEntry;
  import org.apache.bcel.classfile.ElementValuePair;
  import org.apache.commons.classscan.builtin.ClassNameHelper;
  import org.apache.commons.classscan.spi.model.SpiMetaAnnotation;
  import org.apache.commons.classscan.spi.model.SpiMetaClassLoader;
  import org.apache.commons.classscan.util.NameSet;
  
  public class BcelAnnotation implements SpiMetaAnnotation {
  
      private final String name;
      private final NameSet<SpiProperty> properties;
  
      public BcelAnnotation(AnnotationEntry annotation) {
          name = ClassNameHelper.internalToCanonicalName(annotation.getAnnotationType());
  
          ElementValuePair[] elementValuePairs = annotation.getElementValuePairs();
          if (elementValuePairs.length == 0) {
              properties = NameSet.emptyNameSet();
          }
          else {
              properties = new NameSet<SpiProperty>(fillMapAndArray(elementValuePairs));
          }
      }
  
  	@Override
  	public boolean resolve(SpiMetaClassLoader classLoader) {
  		return properties.resolve(classLoader);
  	}
  
      private SpiProperty[] fillMapAndArray(ElementValuePair[] evPairs) {
          SpiProperty[] values = new SpiProperty[evPairs.length];
          for (int i = 0; i < evPairs.length; ++i) {
              values[i] = new BcelProperty(evPairs[i]);
          }
          return values;
      }
  
      @Override
      public String getName() {
          return name;
      }
  
      @Override
      public Set<? extends Property> getProperties() {
          return properties;
      }
  
      @Override
      public Property getProperty(String propertyName) {
          return properties.getValue(propertyName);
      }
  }