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Groovy: A powerful, dynamic language for the JVM
/**
* 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 groovy.json.internal;
/**
* @author Richard Hightower
*/
public interface CharacterSource {
/**
* Skip white space.
*/
void skipWhiteSpace();
/**
* returns the next character moving the file pointer or index to the next location.
*/
int nextChar();
/**
* returns the current character without changing the IO pointer or index.
*/
int currentChar();
/**
* Checks to see if there is a next character.
*/
boolean hasChar();
/**
* Useful for finding constants in a string like true, false, etc.
*/
boolean consumeIfMatch(char[] match);
/**
* This is mostly for debugging and testing.
*/
int location();
/**
* Combines the operations of nextChar and hasChar.
* Characters is -1 if not found which signifies end of file.
* This might be preferable to avoid two method calls.
*/
int safeNextChar();
/**
* Used to find strings and their ilk
* Finds the next non-escaped char
*
* @param ch character to find
* @param esc escape character to avoid next char if escaped
* @return list of chars until this is found.
*/
char[] findNextChar(int ch, int esc);
boolean hadEscape();
/**
* Reads a number from the character source.
*/
char[] readNumber();
String errorDetails(String message);
}