001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.parser;
014
015import java.util.*;
016
017import org.apache.juneau.internal.*;
018
019/**
020 * Identifies a position in a reader or input stream.
021 */
022public class Position {
023
024   static final Position UNKNOWN = new Position(-1);
025
026   int line, column, position;
027
028   /**
029    * Constructor.
030    *
031    * @param line The current line number.
032    * @param column The current column number.
033    */
034   public Position(int line, int column) {
035      this.line = line;
036      this.column = column;
037      this.position = -1;
038   }
039
040   /**
041    * Constructor.
042    *
043    * @param position The current byte position.
044    */
045   public Position(int position) {
046      this.line = -1;
047      this.column = -1;
048      this.position = position;
049   }
050
051   @Override /* Object */
052   public String toString() {
053      List<String> l = new ArrayList<>();
054      if (line != -1)
055         l.add("line " + line);
056      if (column != -1)
057         l.add("column " + column);
058      if (position != -1)
059         l.add("position " + position);
060      if (l.isEmpty())
061         l.add("unknown");
062      return StringUtils.join(l, ", ");
063   }
064
065   /**
066    * Returns the current line.
067    *
068    * @return The current line, or <code>-1</code> if not specified.
069    */
070   public int getLine() {
071      return line;
072   }
073
074   /**
075    * Returns the current column.
076    *
077    * @return The current column, or <code>-1</code> if not specified.
078    */
079   public int getColumn() {
080      return column;
081   }
082
083   /**
084    * Returns the current byte position.
085    *
086    * @return The current byte position, or <code>-1</code> if not specified.
087    */
088   public int getPosition() {
089      return position;
090   }
091}