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Java 8 Functional interface extentions, collection decorators, I/O interfaces, and assertions

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/*
 * Copyright (C) 2015 fuwjax.org ([email protected])
 *
 * 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.fuwjax.oss.util.io;

import java.util.PrimitiveIterator;

public class StringIntReader implements IntReader.Safe {
	private final PrimitiveIterator.OfInt iter;
	private final CharSequence chars;
	private int count;

	public StringIntReader(final CharSequence chars) {
		this.chars = chars;
		iter = chars.codePoints().iterator();
	}

	@Override
	public int read() {
		if(iter.hasNext()) {
			count++;
			return iter.nextInt();
		}
		return -1;
	}

	@Override
	public String toString() {
		return chars.subSequence(count, chars.length()).toString();
	}
}