/*
 * Copyright 2010 NCHOVY
 * 
 * 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.
 */
package org.krakenapps.sqlparser.impl;

import java.util.Iterator;

public class TokenStream implements Iterable<String> {
	private String sql;

	public TokenStream(String sql) {
		this.sql = sql;
	}

	public TokenIterator iterator() {
		return new TokenIterator(sql);
	}

	private static class TokenIterator implements Iterator<String> {
		private String[] tokens;
		private int pos = 0;

		public TokenIterator(String sql) {
			tokens = sql.split(" ");
		}

		@Override
		public boolean hasNext() {
			return pos < tokens.length - 1;
		}

		@Override
		public String next() {
			return tokens[pos++];
		}

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

}