/**
 * 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.ambari.server.state.stack;

import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;
import org.apache.ambari.server.stack.Validable;

/**
 * Represents the stack <code>metainfo.xml</code> file.
 */
@XmlRootElement(name="metainfo")
@XmlAccessorType(XmlAccessType.FIELD)
public class StackMetainfoXml implements Validable{
  
  @XmlElement(name="extends")
  private String extendsVersion = null;
  
  @XmlElement(name="versions")
  private Version version = new Version();

  @XmlTransient
  private boolean valid = true;

  /**
   * 
   * @return valid xml flag
   */
  @Override
  public boolean isValid() {
    return valid;
  }

  /**
   * 
   * @param valid set validity flag
   */
  @Override
  public void setValid(boolean valid) {
    this.valid = valid;
  }
  
  @XmlTransient
  private Set<String> errorSet = new HashSet<String>();
  
  @Override
  public void setErrors(String error) {
    errorSet.add(error);
  }

  @Override
  public Collection getErrors() {
    return errorSet;
  }   

  @Override
  public void setErrors(Collection error) {
    this.errorSet.addAll(error);
  }
  
  /**
   * @return the parent stack version number
   */
  public String getExtends() {
    return extendsVersion;
  }
  
  /**
   * @return gets the version
   */
  public Version getVersion() {
    return version;
  }
  
  @XmlAccessorType(XmlAccessType.FIELD)
  public static class Version {
    private Version() {
    }
    private boolean active = false;
    private String upgrade = null;
    
    /**
     * @return <code>true</code> if the stack is active
     */
    public boolean isActive() {
      return active;
    }
    
    /**
     * @return the upgrade version number, if set
     */
    public String getUpgrade() {
      return upgrade;
    }
    
    
  }  
  
}



