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/*
* 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 org.apache.commons.math3.geometry.euclidean.threed;
import java.text.FieldPosition;
import java.text.NumberFormat;
import java.text.ParsePosition;
import java.util.Locale;
import org.apache.commons.math3.exception.MathParseException;
import org.apache.commons.math3.geometry.Vector;
import org.apache.commons.math3.geometry.VectorFormat;
import org.apache.commons.math3.util.CompositeFormat;
/**
* Formats a 3D vector in components list format "{x; y; z}".
* <p>The prefix and suffix "{" and "}" and the separator "; " can be replaced by
* any user-defined strings. The number format for components can be configured.</p>
* <p>White space is ignored at parse time, even if it is in the prefix, suffix
* or separator specifications. So even if the default separator does include a space
* character that is used at format time, both input string "{1;1;1}" and
* " { 1 ; 1 ; 1 } " will be parsed without error and the same vector will be
* returned. In the second case, however, the parse position after parsing will be
* just after the closing curly brace, i.e. just before the trailing space.</p>
* <p><b>Note:</b> using "," as a separator may interfere with the grouping separator
* of the default {@link NumberFormat} for the current locale. Thus it is advised
* to use a {@link NumberFormat} instance with disabled grouping in such a case.</p>
*
*/
public class Vector3DFormat extends VectorFormat<Euclidean3D> {
/**
* Create an instance with default settings.
* <p>The instance uses the default prefix, suffix and separator:
* "{", "}", and "; " and the default number format for components.</p>
*/
public Vector3DFormat() {
super(DEFAULT_PREFIX, DEFAULT_SUFFIX, DEFAULT_SEPARATOR,
CompositeFormat.getDefaultNumberFormat());
}
/**
* Create an instance with a custom number format for components.
* @param format the custom format for components.
*/
public Vector3DFormat(final NumberFormat format) {
super(DEFAULT_PREFIX, DEFAULT_SUFFIX, DEFAULT_SEPARATOR, format);
}
/**
* Create an instance with custom prefix, suffix and separator.
* @param prefix prefix to use instead of the default "{"
* @param suffix suffix to use instead of the default "}"
* @param separator separator to use instead of the default "; "
*/
public Vector3DFormat(final String prefix, final String suffix,
final String separator) {
super(prefix, suffix, separator, CompositeFormat.getDefaultNumberFormat());
}
/**
* Create an instance with custom prefix, suffix, separator and format
* for components.
* @param prefix prefix to use instead of the default "{"
* @param suffix suffix to use instead of the default "}"
* @param separator separator to use instead of the default "; "
* @param format the custom format for components.
*/
public Vector3DFormat(final String prefix, final String suffix,
final String separator, final NumberFormat format) {
super(prefix, suffix, separator, format);
}
/**
* Returns the default 3D vector format for the current locale.
* @return the default 3D vector format.
*/
public static Vector3DFormat getInstance() {
return getInstance(Locale.getDefault());
}
/**
* Returns the default 3D vector format for the given locale.
* @param locale the specific locale used by the format.
* @return the 3D vector format specific to the given locale.
*/
public static Vector3DFormat getInstance(final Locale locale) {
return new Vector3DFormat(CompositeFormat.getDefaultNumberFormat(locale));
}
/**
* Formats a {@link Vector3D} object to produce a string.
* @param vector the object to format.
* @param toAppendTo where the text is to be appended
* @param pos On input: an alignment field, if desired. On output: the
* offsets of the alignment field
* @return the value passed in as toAppendTo.
*/
@Override
public StringBuffer format(final Vector<Euclidean3D> vector, final StringBuffer toAppendTo,
final FieldPosition pos) {
final Vector3D v3 = (Vector3D) vector;
return format(toAppendTo, pos, v3.getX(), v3.getY(), v3.getZ());
}
/**
* Parses a string to produce a {@link Vector3D} object.
* @param source the string to parse
* @return the parsed {@link Vector3D} object.
* @throws MathParseException if the beginning of the specified string
* cannot be parsed.
*/
@Override
public Vector3D parse(final String source) throws MathParseException {
ParsePosition parsePosition = new ParsePosition(0);
Vector3D result = parse(source, parsePosition);
if (parsePosition.getIndex() == 0) {
throw new MathParseException(source,
parsePosition.getErrorIndex(),
Vector3D.class);
}
return result;
}
/**
* Parses a string to produce a {@link Vector3D} object.
* @param source the string to parse
* @param pos input/ouput parsing parameter.
* @return the parsed {@link Vector3D} object.
*/
@Override
public Vector3D parse(final String source, final ParsePosition pos) {
final double[] coordinates = parseCoordinates(3, source, pos);
if (coordinates == null) {
return null;
}
return new Vector3D(coordinates[0], coordinates[1], coordinates[2]);
}
}
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