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/*
 * ====================================================================
 * 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */

package org.apache.http.message;

/**
 * This class represents a context of a parsing operation:
 * 
    *
  • the current position the parsing operation is expected to start at
  • *
  • the bounds limiting the scope of the parsing operation
  • *
* * @since 4.0 */ public class ParserCursor { private final int lowerBound; private final int upperBound; private int pos; public ParserCursor(final int lowerBound, final int upperBound) { super(); if (lowerBound < 0) { throw new IndexOutOfBoundsException("Lower bound cannot be negative"); } if (lowerBound > upperBound) { throw new IndexOutOfBoundsException("Lower bound cannot be greater then upper bound"); } this.lowerBound = lowerBound; this.upperBound = upperBound; this.pos = lowerBound; } public int getLowerBound() { return this.lowerBound; } public int getUpperBound() { return this.upperBound; } public int getPos() { return this.pos; } public void updatePos(final int pos) { if (pos < this.lowerBound) { throw new IndexOutOfBoundsException("pos: "+pos+" < lowerBound: "+this.lowerBound); } if (pos > this.upperBound) { throw new IndexOutOfBoundsException("pos: "+pos+" > upperBound: "+this.upperBound); } this.pos = pos; } public boolean atEnd() { return this.pos >= this.upperBound; } @Override public String toString() { final StringBuilder buffer = new StringBuilder(); buffer.append('['); buffer.append(Integer.toString(this.lowerBound)); buffer.append('>'); buffer.append(Integer.toString(this.pos)); buffer.append('>'); buffer.append(Integer.toString(this.upperBound)); buffer.append(']'); return buffer.toString(); } }




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