/*
 * 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
 *
 *   https://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.accumulo.core.iterators;

import java.io.IOException;
import java.util.Iterator;
import java.util.Map.Entry;
import java.util.NoSuchElementException;

import org.apache.accumulo.core.data.Key;
import org.apache.accumulo.core.data.KeyValue;
import org.apache.accumulo.core.data.Value;

public class IteratorAdapter implements Iterator<Entry<Key,Value>> {

  SortedKeyValueIterator<Key,Value> inner;

  public IteratorAdapter(SortedKeyValueIterator<Key,Value> inner) {
    this.inner = inner;
  }

  @Override
  public boolean hasNext() {
    return inner.hasTop();
  }

  @Override
  public Entry<Key,Value> next() {
    try {
      Entry<Key,Value> result =
          new KeyValue(new Key(inner.getTopKey()), new Value(inner.getTopValue()).get());
      inner.next();
      return result;
    } catch (IOException ex) {
      throw new NoSuchElementException();
    }
  }

  @Override
  public void remove() {
    throw new UnsupportedOperationException();
  }
}
