View Javadoc
1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      https://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  /*
19   * This is not the original file distributed by the Apache Software Foundation
20   * It has been modified by the Hipparchus project
21   */
22  
23  package org.hipparchus.geometry.euclidean.threed;
24  
25  import java.text.FieldPosition;
26  import java.text.NumberFormat;
27  import java.text.ParsePosition;
28  import java.util.Locale;
29  
30  import org.hipparchus.exception.LocalizedCoreFormats;
31  import org.hipparchus.exception.MathIllegalStateException;
32  import org.hipparchus.geometry.Vector;
33  import org.hipparchus.geometry.VectorFormat;
34  import org.hipparchus.util.CompositeFormat;
35  
36  /**
37   * Formats a 3D vector in components list format "{x; y; z}".
38   * <p>The prefix and suffix "{" and "}" and the separator "; " can be replaced by
39   * any user-defined strings. The number format for components can be configured.</p>
40   * <p>White space is ignored at parse time, even if it is in the prefix, suffix
41   * or separator specifications. So even if the default separator does include a space
42   * character that is used at format time, both input string "{1;1;1}" and
43   * " { 1 ; 1 ; 1 } " will be parsed without error and the same vector will be
44   * returned. In the second case, however, the parse position after parsing will be
45   * just after the closing curly brace, i.e. just before the trailing space.</p>
46   * <p><b>Note:</b> using "," as a separator may interfere with the grouping separator
47   * of the default {@link NumberFormat} for the current locale. Thus it is advised
48   * to use a {@link NumberFormat} instance with disabled grouping in such a case.</p>
49   *
50   */
51  public class Vector3DFormat extends VectorFormat<Euclidean3D, Vector3D> {
52  
53      /**
54       * Create an instance with default settings.
55       * <p>The instance uses the default prefix, suffix and separator:
56       * "{", "}", and "; " and the default number format for components.</p>
57       */
58      public Vector3DFormat() {
59          super(DEFAULT_PREFIX, DEFAULT_SUFFIX, DEFAULT_SEPARATOR,
60                CompositeFormat.getDefaultNumberFormat());
61      }
62  
63      /**
64       * Create an instance with a custom number format for components.
65       * @param format the custom format for components.
66       */
67      public Vector3DFormat(final NumberFormat format) {
68          super(DEFAULT_PREFIX, DEFAULT_SUFFIX, DEFAULT_SEPARATOR, format);
69      }
70  
71      /**
72       * Create an instance with custom prefix, suffix and separator.
73       * @param prefix prefix to use instead of the default "{"
74       * @param suffix suffix to use instead of the default "}"
75       * @param separator separator to use instead of the default "; "
76       */
77      public Vector3DFormat(final String prefix, final String suffix,
78                           final String separator) {
79          super(prefix, suffix, separator, CompositeFormat.getDefaultNumberFormat());
80      }
81  
82      /**
83       * Create an instance with custom prefix, suffix, separator and format
84       * for components.
85       * @param prefix prefix to use instead of the default "{"
86       * @param suffix suffix to use instead of the default "}"
87       * @param separator separator to use instead of the default "; "
88       * @param format the custom format for components.
89       */
90      public Vector3DFormat(final String prefix, final String suffix,
91                           final String separator, final NumberFormat format) {
92          super(prefix, suffix, separator, format);
93      }
94  
95      /**
96       * Returns the default 3D vector format for the current locale.
97       * @return the default 3D vector format.
98       * @since 1.4
99       */
100     public static Vector3DFormat getVector3DFormat() {
101         return getVector3DFormat(Locale.getDefault());
102     }
103 
104     /**
105      * Returns the default 3D vector format for the given locale.
106      * @param locale the specific locale used by the format.
107      * @return the 3D vector format specific to the given locale.
108      * @since 1.4
109      */
110     public static Vector3DFormat getVector3DFormat(final Locale locale) {
111         return new Vector3DFormat(CompositeFormat.getDefaultNumberFormat(locale));
112     }
113 
114     /**
115      * Formats a {@link Vector3D} object to produce a string.
116      * @param vector the object to format.
117      * @param toAppendTo where the text is to be appended
118      * @param pos On input: an alignment field, if desired. On output: the
119      *            offsets of the alignment field
120      * @return the value passed in as toAppendTo.
121      */
122     @Override
123     public StringBuffer format(final Vector<Euclidean3D, Vector3D> vector, final StringBuffer toAppendTo,
124                                final FieldPosition pos) {
125         final Vector3D v3 = (Vector3D) vector;
126         return format(toAppendTo, pos, v3.getX(), v3.getY(), v3.getZ());
127     }
128 
129     /**
130      * Parses a string to produce a {@link Vector3D} object.
131      * @param source the string to parse
132      * @return the parsed {@link Vector3D} object.
133      * @throws MathIllegalStateException if the beginning of the specified string
134      * cannot be parsed.
135      */
136     @Override
137     public Vector3D parse(final String source) throws MathIllegalStateException {
138         ParsePosition parsePosition = new ParsePosition(0);
139         Vector3D result = parse(source, parsePosition);
140         if (parsePosition.getIndex() == 0) {
141             throw new MathIllegalStateException(LocalizedCoreFormats.CANNOT_PARSE_AS_TYPE,
142                                                 source, parsePosition.getErrorIndex(),
143                                                 Vector3D.class);
144         }
145         return result;
146     }
147 
148     /**
149      * Parses a string to produce a {@link Vector3D} object.
150      * @param source the string to parse
151      * @param pos input/ouput parsing parameter.
152      * @return the parsed {@link Vector3D} object.
153      */
154     @Override
155     public Vector3D parse(final String source, final ParsePosition pos) {
156         final double[] coordinates = parseCoordinates(3, source, pos);
157         if (coordinates == null) {
158             return null;
159         }
160         return new Vector3D(coordinates[0], coordinates[1], coordinates[2]);
161     }
162 
163 }