/*
    * 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.chemistry.opencmis.commons.impl.dataobjects;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.chemistry.opencmis.commons.data.CmisExtensionElement;
  
  public class CmisExtensionElementImpl implements CmisExtensionElement {
  
      private static final long serialVersionUID = 1L;
  
      private final String name;
      private final String namespace;
      private final String value;
      private Map<String, String> attributes;
      private final List<CmisExtensionElement> children;
  
      /**
       * Constructor for a leaf.
       */
      public CmisExtensionElementImpl(String namespace, String name, Map<String, String> attributes, String value) {
          if (name == null) {
              throw new IllegalArgumentException("Name must set!");
          }
  
          this.name = name;
          this.namespace = namespace;
          this.value = value;
          children = Collections.emptyList();
  
          if (attributes != null) {
              this.attributes = Collections.unmodifiableMap(new HashMap<String, String>(attributes));
          } else {
              this.attributes = Collections.emptyMap();
          }
      }
  
      /**
       * Constructor for a node.
       */
      public CmisExtensionElementImpl(String namespace, String name, Map<String, String> attributes,
              List<CmisExtensionElement> children) {
          if (name == null) {
              throw new IllegalArgumentException("Name must set!");
          }
  
          this.name = name;
          this.namespace = namespace;
          this.value = null;
  
          if (children != null) {
              this.children = Collections.unmodifiableList(new ArrayList<CmisExtensionElement>(children));
          } else {
              this.children = Collections.emptyList();
          }
  
          if (attributes != null) {
              this.attributes = Collections.unmodifiableMap(new HashMap<String, String>(attributes));
          } else {
              this.attributes = Collections.emptyMap();
          }
      }
  
      /**
       * Copy constructor.
       */
      public CmisExtensionElementImpl(CmisExtensionElement element) {
          if (element == null) {
              throw new IllegalArgumentException("Element must set!");
          }
          if (element.getName() == null) {
              throw new IllegalArgumentException("Name must set!");
          }
  
          this.name = element.getName();
          this.namespace = element.getNamespace();
          this.value = element.getValue();
          this.children = element.getChildren();
     }
 
     public String getName() {
         return name;
     }
 
     public String getNamespace() {
         return namespace;
     }
 
     public String getValue() {
         return value;
     }
 
     public List<CmisExtensionElement> getChildren() {
         return children;
     }
 
     public Map<String, String> getAttributes() {
         return attributes;
     }
 
     @Override
     public String toString() {
         return (namespace == null ? "" : "{" + namespace + "}") + name + " " + attributes + ": "
                 + (children.isEmpty() ? value : children.toString());
     }
 }