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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file:
 *
 * The MIT License
 *
 * Copyright (c) 2004-2015 Paul R. Holser, Jr.
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package jdk.internal.joptsimple;


Instances of this interface are used to convert arguments of options into specific Java types.

Author:Paul Holser
Type parameters:
  • <V> – constraint on the type of values being converted to
/**
 * Instances of this interface are used to convert arguments of options into specific Java types.
 *
 * @param <V> constraint on the type of values being converted to
 * @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a>
 */
public interface ValueConverter<V> {
    
Converts the given string value into a Java type.

Params:
  • value – the string to convert
Throws:
Returns:the converted value
/**
     * Converts the given string value into a Java type.
     *
     * @param value the string to convert
     * @return the converted value
     * @throws ValueConversionException if a problem occurs while converting the value
     */
    V convert( String value );

    
Gives the class of the type of values this converter converts to.

Returns:the target class for conversion
/**
     * Gives the class of the type of values this converter converts to.
     *
     * @return the target class for conversion
     */
    Class<? extends V> valueType();

    
Gives a string that describes the pattern of the values this converter expects, if any. For example, a date converter can respond with a date format string. 
Returns:a value pattern, or null if there's nothing interesting here
/**
     * Gives a string that describes the pattern of the values this converter expects, if any.  For example, a date
     * converter can respond with a {@link java.text.SimpleDateFormat date format string}.
     *
     * @return a value pattern, or {@code null} if there's nothing interesting here
     */
    String valuePattern();
}