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Diffstat (limited to 'src/main/java/org/apache/commons/math3/geometry/euclidean/oned/Vector1DFormat.java')
-rw-r--r-- | src/main/java/org/apache/commons/math3/geometry/euclidean/oned/Vector1DFormat.java | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/src/main/java/org/apache/commons/math3/geometry/euclidean/oned/Vector1DFormat.java b/src/main/java/org/apache/commons/math3/geometry/euclidean/oned/Vector1DFormat.java new file mode 100644 index 0000000..27f1905 --- /dev/null +++ b/src/main/java/org/apache/commons/math3/geometry/euclidean/oned/Vector1DFormat.java @@ -0,0 +1,135 @@ +/* + * 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.oned; + +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 1D vector in components list format "{x}". + * <p>The prefix and suffix "{" and "}" 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}" and + * " { 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> + * + * @since 3.0 + */ +public class Vector1DFormat extends VectorFormat<Euclidean1D> { + + /** + * 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 Vector1DFormat() { + 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 Vector1DFormat(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 "}" + */ + public Vector1DFormat(final String prefix, final String suffix) { + super(prefix, suffix, DEFAULT_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 format the custom format for components. + */ + public Vector1DFormat(final String prefix, final String suffix, + final NumberFormat format) { + super(prefix, suffix, DEFAULT_SEPARATOR, format); + } + + /** + * Returns the default 1D vector format for the current locale. + * @return the default 1D vector format. + */ + public static Vector1DFormat getInstance() { + return getInstance(Locale.getDefault()); + } + + /** + * Returns the default 1D vector format for the given locale. + * @param locale the specific locale used by the format. + * @return the 1D vector format specific to the given locale. + */ + public static Vector1DFormat getInstance(final Locale locale) { + return new Vector1DFormat(CompositeFormat.getDefaultNumberFormat(locale)); + } + + /** {@inheritDoc} */ + @Override + public StringBuffer format(final Vector<Euclidean1D> vector, final StringBuffer toAppendTo, + final FieldPosition pos) { + final Vector1D p1 = (Vector1D) vector; + return format(toAppendTo, pos, p1.getX()); + } + + /** {@inheritDoc} */ + @Override + public Vector1D parse(final String source) throws MathParseException { + ParsePosition parsePosition = new ParsePosition(0); + Vector1D result = parse(source, parsePosition); + if (parsePosition.getIndex() == 0) { + throw new MathParseException(source, + parsePosition.getErrorIndex(), + Vector1D.class); + } + return result; + } + + /** {@inheritDoc} */ + @Override + public Vector1D parse(final String source, final ParsePosition pos) { + final double[] coordinates = parseCoordinates(1, source, pos); + if (coordinates == null) { + return null; + } + return new Vector1D(coordinates[0]); + } + +} |