/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.maven.resolver.internal.ant.types;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.Task;
  import org.apache.tools.ant.types.DataType;
  import org.apache.tools.ant.types.Reference;
  
  /**
   */
  public class Exclusion extends DataType {
  
      private static final String WILDCARD = "*";
  
      private String groupId;
  
      private String artifactId;
  
      private String classifier;
  
      private String extension;
  
      protected Exclusion getRef() {
          return (Exclusion) getCheckedRef();
      }
  
      public void validate(Task task) {
          if (isReference()) {
              getRef().validate(task);
          } else {
              if (groupId == null && artifactId == null && classifier == null && extension == null) {
                  throw new BuildException(
                          "You must specify at least one of " + "'groupId', 'artifactId', 'classifier' or 'extension'");
              }
          }
      }
  
      public void setRefid(Reference ref) {
          if (groupId != null || artifactId != null || extension != null || classifier != null) {
              throw tooManyAttributes();
          }
          super.setRefid(ref);
      }
  
      public String getGroupId() {
          if (isReference()) {
              return getRef().getGroupId();
          }
          return (groupId != null) ? groupId : WILDCARD;
      }
  
      public void setGroupId(String groupId) {
          checkAttributesAllowed();
          if (this.groupId != null) {
              throw ambiguousCoords();
          }
          this.groupId = groupId;
      }
  
      public String getArtifactId() {
          if (isReference()) {
              return getRef().getArtifactId();
          }
          return (artifactId != null) ? artifactId : WILDCARD;
      }
  
      public void setArtifactId(String artifactId) {
          checkAttributesAllowed();
          if (this.artifactId != null) {
              throw ambiguousCoords();
          }
          this.artifactId = artifactId;
      }
  
      public String getClassifier() {
          if (isReference()) {
              return getRef().getClassifier();
          }
          return (classifier != null) ? classifier : WILDCARD;
     }
 
     public void setClassifier(String classifier) {
         checkAttributesAllowed();
         if (this.classifier != null) {
             throw ambiguousCoords();
         }
         this.classifier = classifier;
     }
 
     public String getExtension() {
         if (isReference()) {
             return getRef().getExtension();
         }
         return (extension != null) ? extension : WILDCARD;
     }
 
     public void setExtension(String extension) {
         checkAttributesAllowed();
         if (this.extension != null) {
             throw ambiguousCoords();
         }
         this.extension = extension;
     }
 
     public void setCoords(String coords) {
         checkAttributesAllowed();
         if (groupId != null || artifactId != null || extension != null || classifier != null) {
             throw ambiguousCoords();
         }
         Pattern p = Pattern.compile("([^: ]+)(:([^: ]+)(:([^: ]+)(:([^: ]*))?)?)?");
         Matcher m = p.matcher(coords);
         if (!m.matches()) {
             throw new BuildException("Bad exclusion coordinates '" + coords
                     + "', expected format is <groupId>[:<artifactId>[:<extension>[:<classifier>]]]");
         }
         groupId = m.group(1);
         artifactId = m.group(3);
         if (artifactId == null) {
             artifactId = "*";
         }
         extension = m.group(5);
         if (extension == null) {
             extension = "*";
         }
         classifier = m.group(7);
         if (classifier == null) {
             classifier = "*";
         }
     }
 
     private BuildException ambiguousCoords() {
         return new BuildException(
                 "You must not specify both 'coords' and " + "('groupId', 'artifactId', 'extension', 'classifier')");
     }
 }