/**
    * Licensed to jclouds, Inc. (jclouds) under one or more
    * contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  jclouds 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.jclouds.domain;
  
  import static com.google.common.base.Preconditions.checkNotNull;
  
  import java.net.URI;
  import java.util.List;
  
  import org.jclouds.util.Strings2;
  
  import com.google.common.base.Splitter;
  import com.google.common.collect.Lists;
  
  /**
   * @author Adrian Cole
   */
  public class Credentials {
  
     public static class Builder<T extends Credentials> {
        private String identity;
        private String credential;
  
        public Builder<T> identity(String identity) {
           this.identity = identity;
           return this;
        }
  
        public Builder<T> credential(String credential) {
           this.credential = credential;
           return this;
        }
  
        @SuppressWarnings("unchecked")
        public T build() {
           return (T) new Credentials(identity, credential);
        }
     }
  
     public final String identity;
     public final String credential;
  
     public Credentials(String identity, String credential) {
        this.identity = identity;
        this.credential = credential;
     }
  
     public static Credentials parse(URI uri) {
        checkNotNull(uri, "uri");
        List<String> userInfo = Lists.newArrayList(Splitter.on(':').split(
              checkNotNull(uri.getUserInfo(), "no userInfo in " + uri)));
        String identity = checkNotNull(userInfo.get(0), "no username in " + uri.getUserInfo());
        if (Strings2.isUrlEncoded(identity)) {
           identity = Strings2.urlDecode(identity);
        }
        String credential = userInfo.size() > 1 ? userInfo.get(1) : null;
        if (credential != null && Strings2.isUrlEncoded(credential)) {
           credential = Strings2.urlDecode(credential);
        }
        return new Credentials(identity, credential);
     }
  
     public Builder<? extends Credentials> toBuilder() {
        return new Builder<Credentials>().identity(identity).credential(credential);
     }
  
     @Override
     public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((credential == null) ? 0 : credential.hashCode());
        result = prime * result + ((identity == null) ? 0 : identity.hashCode());
        return result;
     }
  
     @Override
     public boolean equals(Object obj) {
        if (this == obj)
           return true;
        if (obj == null)
           return false;
        if (!(obj instanceof Credentials))
           return false;
       Credentials other = (Credentials) obj;
       if (credential == null) {
          if (other.credential != null)
             return false;
       } else if (!credential.equals(other.credential))
          return false;
       if (identity == null) {
          if (other.identity != null)
             return false;
       } else if (!identity.equals(other.identity))
          return false;
       return true;
    }
 
 }