/*
* Copyright 2001-2014 Stephen Colebourne
*
* 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.joda.time.format;
/**
* Internal interface for parsing textual representations of datetimes.
* <p>
* This has been separated from {@link DateTimeParser} to change to using
* {@code CharSequence}.
*
* @author Stephen Colebourne
* @since 2.4
*/
interface InternalParser {
/**
* Returns the expected maximum number of characters consumed.
* The actual amount should rarely exceed this estimate.
*
* @return the estimated length
*/
int estimateParsedLength();
/**
* Parse an element from the given text, saving any fields into the given
* DateTimeParserBucket. If the parse succeeds, the return value is the new
* text position. Note that the parse may succeed without fully reading the
* text.
* <p>
* If it fails, the return value is negative. To determine the position
* where the parse failed, apply the one's complement operator (~) on the
* return value.
*
* @param bucket field are saved into this, not null
* @param text the text to parse, not null
* @param position position to start parsing from
* @return new position, negative value means parse failed -
* apply complement operator (~) to get position of failure
* @throws IllegalArgumentException if any field is out of range
*/
int parseInto(DateTimeParserBucket bucket, CharSequence text, int position);
}