package de.fhdw.wtf.common.stream;
   
   import java.util.ArrayList;
   import java.util.List;
   
   /**
    * ScannerInput that relies on a String as sorted source of characters.
    * 
    */
  public class SimpleScannerInput implements ScannerInputStream {
  	
  	/**
  	 * Splitted list of characters showing the stream.
  	 */
  	private final List<Character> data = new ArrayList<>();
  	
  	/**
  	 * Constructor using a single String as input source.
  	 * 
  	 * @param input
  	 *            characters in this stream
  	 */
  	public SimpleScannerInput(final String input) {
  		for (int i = 0; i < input.length(); i++) {
  			this.data.add(input.charAt(i));
  		}
  	}
  	
  	@Override
  	public char next() {
  		final char next = this.data.get(0);
  		this.data.remove(0);
  		return next;
  	}
  	
  	@Override
  	public boolean hasNext() {
  		return !this.data.isEmpty();
  	}
  	
  }