/*
 * 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
 *
 *     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.apache.jena.atlas.io;
import static org.apache.jena.atlas.io.IO.EOF ;

public final class CharStreamSequence implements CharStream
{
    private CharSequence string ;
    // Next character.
    private int idx ;

    public CharStreamSequence(CharSequence string)
    {
        this.string = string ;
        this.idx = 0 ;
    }

    @Override
    public int advance()
    {
        if ( idx >= string.length() )
            return EOF ;
        return string.charAt(idx++);
    }

    @Override
    public void closeStream()
    {
        string = null ;
    }
}
