content: package io.github.tapcard.emvnfccard.iso7816emv;
  
  /*
   * Copyright 2010 sasc
   *
   * Licensed 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.
   */
  
  import java.util.Arrays;
  
  public final class ByteArrayWrapper {
  
  	private final byte[] data;
  	private final int hashcode;
  
  	private ByteArrayWrapper(final byte[] data) {
  		this.data = data;
  		hashcode = Arrays.hashCode(data);
  	}
  
  	public static ByteArrayWrapper wrapperAround(final byte[] data) {
  		if (data == null) {
  			throw new NullPointerException();
  		}
  		return new ByteArrayWrapper(data);
  	}
  
  	@Override
  	public boolean equals(final Object other) {
  		if (!(other instanceof ByteArrayWrapper)) {
  			return false;
  		}
  		return Arrays.equals(data, ((ByteArrayWrapper) other).data);
  	}
  
  	@Override
  	public int hashCode() {
  		return hashcode;
  	}
  }