001: // ============================================================================
002: // $Id: FloatMath.java,v 1.5 2005/08/02 23:45:06 davidahall Exp $
003: // Copyright (c) 2003-2005 David A. Hall
004: // ============================================================================
005: // The contents of this file are subject to the Common Development and
006: // Distribution License (CDDL), Version 1.0 (the License); you may not use this
007: // file except in compliance with the License. You should have received a copy
008: // of the the License along with this file: if not, a copy of the License is
009: // available from Sun Microsystems, Inc.
010: //
011: // http://www.sun.com/cddl/cddl.html
012: //
013: // From time to time, the license steward (initially Sun Microsystems, Inc.) may
014: // publish revised and/or new versions of the License. You may not use,
015: // distribute, or otherwise make this file available under subsequent versions
016: // of the License.
017: //
018: // Alternatively, the contents of this file may be used under the terms of the
019: // GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which
020: // case the provisions of the LGPL are applicable instead of those above. If you
021: // wish to allow use of your version of this file only under the terms of the
022: // LGPL, and not to allow others to use your version of this file under the
023: // terms of the CDDL, indicate your decision by deleting the provisions above
024: // and replace them with the notice and other provisions required by the LGPL.
025: // If you do not delete the provisions above, a recipient may use your version
026: // of this file under the terms of either the CDDL or the LGPL.
027: //
028: // This library is distributed in the hope that it will be useful,
029: // but WITHOUT ANY WARRANTY; without even the implied warranty of
030: // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
031: // ============================================================================
032:
033: /**
034: * Provides an implementation of Arithmetic for Floats
035: * <p>
036: * Copyright © 2003-2005 David A. Hall
037: *
038: * @author <a href="mailto:dave@dolphin.hallsquared.org">David A. Hall</a>
039: */package net.sf.jga.fn.arithmetic;
040:
041: class FloatMath implements Arithmetic<Float> {
042:
043: static final long serialVersionUID = 8813677408947677131L;
044:
045: static private final Float ZERO = new Float(0.0f);
046: static private final Float ONE = new Float(1.0f);
047:
048: /**
049: * Returns the given value in the appropriate type
050: * @throws IllegalArgumentException if the value cannot be converted
051: */
052:
053: public Float valueOf(Number value) throws IllegalArgumentException {
054: return new Float(value.floatValue());
055: }
056:
057: /**
058: * Returns the value 0 of the appropriate type
059: */
060:
061: public Float zero() {
062: return ZERO;
063: }
064:
065: /**
066: * Returns the value 1 of the appropriate type
067: */
068:
069: public Float one() {
070: return ONE;
071: }
072:
073: /**
074: * For numeric arguments x and y, returns x + y
075: * @return the sum of the two arguments
076: */
077:
078: public Float plus(Float x, Float y) {
079: return new Float(x.floatValue() + y.floatValue());
080: }
081:
082: /**
083: * For numeric arguments x and y, returns x - y
084: * @return the difference of the two arguments
085: */
086:
087: public Float minus(Float x, Float y) {
088: return new Float(x.floatValue() - y.floatValue());
089: }
090:
091: /**
092: * For numeric arguments x and y, returns x * y
093: * @return the product of the two arguments
094: */
095:
096: public Float multiplies(Float x, Float y) {
097: return new Float(x.floatValue() * y.floatValue());
098: }
099:
100: /**
101: * For numeric arguments x and y, returns x / y
102: * @return the quotient of the two arguments
103: */
104:
105: public Float divides(Float x, Float y) {
106: return new Float(x.floatValue() / y.floatValue());
107: }
108:
109: /**
110: * for numeric argument x, returns -x
111: * @return the negative of its argument
112: */
113:
114: public Float negate(Float x) {
115: return new Float(-x.floatValue());
116: }
117: }
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