Coverage Report

Coverage Report - org.apache.commons.lang3.mutable.MutableDouble

Classes in this File

Line Coverage

Branch Coverage

Complexity

MutableDouble

97%

41/42

100%

4/4

1.042

 /*
  * 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.lang3.mutable;
 
 /**
  * A mutable <code>double</code> wrapper.
  * <p>
  * Note that as MutableDouble does not extend Double, it is not treated by String.format as a Double parameter. 
  * 
  * @see Double
  * @since 2.1
  * @version $Id: MutableDouble.java 1436770 2013-01-22 07:09:45Z ggregory $
  */
 public class MutableDouble extends Number implements Comparable<MutableDouble>, Mutable<Number> {
 
     /**
      * Required for serialization support.
      * 
      * @see java.io.Serializable
      */
     private static final long serialVersionUID = 1587163916L;
 
     /** The mutable value. */
     private double value;
 
     /**
      * Constructs a new MutableDouble with the default value of zero.
      */
     public MutableDouble() {
         super();
     }
 
     /**
      * Constructs a new MutableDouble with the specified value.
      * 
      * @param value  the initial value to store
      */
     public MutableDouble(final double value) {
         super();
         this.value = value;
     }
 
     /**
      * Constructs a new MutableDouble with the specified value.
      * 
      * @param value  the initial value to store, not null
      * @throws NullPointerException if the object is null
      */
     public MutableDouble(final Number value) {
         super();
         this.value = value.doubleValue();
     }
 
     /**
      * Constructs a new MutableDouble parsing the given string.
      * 
      * @param value  the string to parse, not null
      * @throws NumberFormatException if the string cannot be parsed into a double
      * @since 2.5
      */
     public MutableDouble(final String value) throws NumberFormatException {
         super();
         this.value = Double.parseDouble(value);
     }
 
     //-----------------------------------------------------------------------
     /**
      * Gets the value as a Double instance.
      * 
      * @return the value as a Double, never null
      */
     @Override
     public Double getValue() {
         return Double.valueOf(this.value);
     }
 
     /**
      * Sets the value.
      * 
      * @param value  the value to set
      */
     public void setValue(final double value) {
         this.value = value;
     }
 
     /**
      * Sets the value from any Number instance.
      * 
      * @param value  the value to set, not null
      * @throws NullPointerException if the object is null
      */
     @Override
     public void setValue(final Number value) {
         this.value = value.doubleValue();
     }
 
     //-----------------------------------------------------------------------
     /**
      * Checks whether the double value is the special NaN value.
      * 
      * @return true if NaN
      */
     public boolean isNaN() {
         return Double.isNaN(value);
     }
 
     /**
      * Checks whether the double value is infinite.
      * 
      * @return true if infinite
      */
     public boolean isInfinite() {
         return Double.isInfinite(value);
     }
 
     //-----------------------------------------------------------------------
     /**
      * Increments the value.
      *
      * @since Commons Lang 2.2
      */
     public void increment() {
         value++;
     }
 
     /**
      * Decrements the value.
      *
      * @since Commons Lang 2.2
      */
     public void decrement() {
         value--;
     }
 
     //-----------------------------------------------------------------------
     /**
      * Adds a value to the value of this instance.
      * 
      * @param operand  the value to add
      * @since Commons Lang 2.2
      */
     public void add(final double operand) {
         this.value += operand;
     }
 
     /**
      * Adds a value to the value of this instance.
      * 
      * @param operand  the value to add, not null
      * @throws NullPointerException if the object is null
      * @since Commons Lang 2.2
      */
     public void add(final Number operand) {
         this.value += operand.doubleValue();
     }
 
     /**
      * Subtracts a value from the value of this instance.
      * 
      * @param operand  the value to subtract, not null
      * @since Commons Lang 2.2
      */
     public void subtract(final double operand) {
         this.value -= operand;
     }
 
     /**
      * Subtracts a value from the value of this instance.
      * 
      * @param operand  the value to subtract, not null
      * @throws NullPointerException if the object is null
      * @since Commons Lang 2.2
      */
     public void subtract(final Number operand) {
         this.value -= operand.doubleValue();
     }
 
     //-----------------------------------------------------------------------
     // shortValue and byteValue rely on Number implementation
     /**
      * Returns the value of this MutableDouble as an int.
      *
      * @return the numeric value represented by this object after conversion to type int.
      */
     @Override
     public int intValue() {
         return (int) value;
     }
 
     /**
      * Returns the value of this MutableDouble as a long.
      *
      * @return the numeric value represented by this object after conversion to type long.
      */
     @Override
     public long longValue() {
         return (long) value;
     }
 
     /**
      * Returns the value of this MutableDouble as a float.
      *
      * @return the numeric value represented by this object after conversion to type float.
      */
     @Override
     public float floatValue() {
         return (float) value;
     }
 
     /**
      * Returns the value of this MutableDouble as a double.
      *
      * @return the numeric value represented by this object after conversion to type double.
      */
     @Override
     public double doubleValue() {
         return value;
     }
 
     //-----------------------------------------------------------------------
     /**
      * Gets this mutable as an instance of Double.
      *
      * @return a Double instance containing the value from this mutable, never null
      */
     public Double toDouble() {
         return Double.valueOf(doubleValue());
     }
 
     //-----------------------------------------------------------------------
     /**
      * Compares this object against the specified object. The result is <code>true</code> if and only if the argument
      * is not <code>null</code> and is a <code>Double</code> object that represents a double that has the identical
      * bit pattern to the bit pattern of the double represented by this object. For this purpose, two
      * <code>double</code> values are considered to be the same if and only if the method
      * {@link Double#doubleToLongBits(double)}returns the same long value when applied to each.
      * <p>
      * Note that in most cases, for two instances of class <code>Double</code>,<code>d1</code> and <code>d2</code>,
      * the value of <code>d1.equals(d2)</code> is <code>true</code> if and only if <blockquote>
      * 
      * <pre>
      *   d1.doubleValue()&nbsp;== d2.doubleValue()
      * </pre>
      * 
      * </blockquote>
      * <p>
      * also has the value <code>true</code>. However, there are two exceptions:
      * <ul>
      * <li>If <code>d1</code> and <code>d2</code> both represent <code>Double.NaN</code>, then the
      * <code>equals</code> method returns <code>true</code>, even though <code>Double.NaN==Double.NaN</code> has
      * the value <code>false</code>.
      * <li>If <code>d1</code> represents <code>+0.0</code> while <code>d2</code> represents <code>-0.0</code>,
      * or vice versa, the <code>equal</code> test has the value <code>false</code>, even though
      * <code>+0.0==-0.0</code> has the value <code>true</code>. This allows hashtables to operate properly.
      * </ul>
      * 
      * @param obj  the object to compare with, null returns false
      * @return <code>true</code> if the objects are the same; <code>false</code> otherwise.
      */
     @Override
     public boolean equals(final Object obj) {
         return obj instanceof MutableDouble
             && Double.doubleToLongBits(((MutableDouble) obj).value) == Double.doubleToLongBits(value);
     }
 
     /**
      * Returns a suitable hash code for this mutable.
      * 
      * @return a suitable hash code
      */
     @Override
     public int hashCode() {
         final long bits = Double.doubleToLongBits(value);
         return (int) (bits ^ bits >>> 32);
     }
 
     //-----------------------------------------------------------------------
     /**
      * Compares this mutable to another in ascending order.
      * 
      * @param other  the other mutable to compare to, not null
      * @return negative if this is less, zero if equal, positive if greater
      */
     @Override
     public int compareTo(final MutableDouble other) {
         final double anotherVal = other.value;
         return Double.compare(value, anotherVal);
     }
 
     //-----------------------------------------------------------------------
     /**
      * Returns the String value of this mutable.
      * 
      * @return the mutable value as a string
      */
     @Override
     public String toString() {
         return String.valueOf(value);
     }
 
 }

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		* http://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		package org.apache.commons.lang3.mutable;
18
19		/**
20		* A mutable <code>double</code> wrapper.
21		* <p>
22		* Note that as MutableDouble does not extend Double, it is not treated by String.format as a Double parameter.
23		*
24		* @see Double
25		* @since 2.1
26		* @version $Id: MutableDouble.java 1436770 2013-01-22 07:09:45Z ggregory $
27		*/
28	0	public class MutableDouble extends Number implements Comparable<MutableDouble>, Mutable<Number> {
29
30		/**
31		* Required for serialization support.
32		*
33		* @see java.io.Serializable
34		*/
35		private static final long serialVersionUID = 1587163916L;
36
37		/** The mutable value. */
38		private double value;
39
40		/**
41		* Constructs a new MutableDouble with the default value of zero.
42		*/
43		public MutableDouble() {
44	3	super();
45	3	}
46
47		/**
48		* Constructs a new MutableDouble with the specified value.
49		*
50		* @param value the initial value to store
51		*/
52		public MutableDouble(final double value) {
53	31	super();
54	31	this.value = value;
55	31	}
56
57		/**
58		* Constructs a new MutableDouble with the specified value.
59		*
60		* @param value the initial value to store, not null
61		* @throws NullPointerException if the object is null
62		*/
63		public MutableDouble(final Number value) {
64	3	super();
65	3	this.value = value.doubleValue();
66	2	}
67
68		/**
69		* Constructs a new MutableDouble parsing the given string.
70		*
71		* @param value the string to parse, not null
72		* @throws NumberFormatException if the string cannot be parsed into a double
73		* @since 2.5
74		*/
75		public MutableDouble(final String value) throws NumberFormatException {
76	1	super();
77	1	this.value = Double.parseDouble(value);
78	1	}
79
80		//-----------------------------------------------------------------------
81		/**
82		* Gets the value as a Double instance.
83		*
84		* @return the value as a Double, never null
85		*/
86		@Override
87		public Double getValue() {
88	4	return Double.valueOf(this.value);
89		}
90
91		/**
92		* Sets the value.
93		*
94		* @param value the value to set
95		*/
96		public void setValue(final double value) {
97	1	this.value = value;
98	1	}
99
100		/**
101		* Sets the value from any Number instance.
102		*
103		* @param value the value to set, not null
104		* @throws NullPointerException if the object is null
105		*/
106		@Override
107		public void setValue(final Number value) {
108	3	this.value = value.doubleValue();
109	2	}
110
111		//-----------------------------------------------------------------------
112		/**
113		* Checks whether the double value is the special NaN value.
114		*
115		* @return true if NaN
116		*/
117		public boolean isNaN() {
118	1	return Double.isNaN(value);
119		}
120
121		/**
122		* Checks whether the double value is infinite.
123		*
124		* @return true if infinite
125		*/
126		public boolean isInfinite() {
127	2	return Double.isInfinite(value);
128		}
129
130		//-----------------------------------------------------------------------
131		/**
132		* Increments the value.
133		*
134		* @since Commons Lang 2.2
135		*/
136		public void increment() {
137	1	value++;
138	1	}
139
140		/**
141		* Decrements the value.
142		*
143		* @since Commons Lang 2.2
144		*/
145		public void decrement() {
146	1	value--;
147	1	}
148
149		//-----------------------------------------------------------------------
150		/**
151		* Adds a value to the value of this instance.
152		*
153		* @param operand the value to add
154		* @since Commons Lang 2.2
155		*/
156		public void add(final double operand) {
157	1	this.value += operand;
158	1	}
159
160		/**
161		* Adds a value to the value of this instance.
162		*
163		* @param operand the value to add, not null
164		* @throws NullPointerException if the object is null
165		* @since Commons Lang 2.2
166		*/
167		public void add(final Number operand) {
168	1	this.value += operand.doubleValue();
169	1	}
170
171		/**
172		* Subtracts a value from the value of this instance.
173		*
174		* @param operand the value to subtract, not null
175		* @since Commons Lang 2.2
176		*/
177		public void subtract(final double operand) {
178	1	this.value -= operand;
179	1	}
180
181		/**
182		* Subtracts a value from the value of this instance.
183		*
184		* @param operand the value to subtract, not null
185		* @throws NullPointerException if the object is null
186		* @since Commons Lang 2.2
187		*/
188		public void subtract(final Number operand) {
189	1	this.value -= operand.doubleValue();
190	1	}
191
192		//-----------------------------------------------------------------------
193		// shortValue and byteValue rely on Number implementation
194		/**
195		* Returns the value of this MutableDouble as an int.
196		*
197		* @return the numeric value represented by this object after conversion to type int.
198		*/
199		@Override
200		public int intValue() {
201	5	return (int) value;
202		}
203
204		/**
205		* Returns the value of this MutableDouble as a long.
206		*
207		* @return the numeric value represented by this object after conversion to type long.
208		*/
209		@Override
210		public long longValue() {
211	3	return (long) value;
212		}
213
214		/**
215		* Returns the value of this MutableDouble as a float.
216		*
217		* @return the numeric value represented by this object after conversion to type float.
218		*/
219		@Override
220		public float floatValue() {
221	1	return (float) value;
222		}
223
224		/**
225		* Returns the value of this MutableDouble as a double.
226		*
227		* @return the numeric value represented by this object after conversion to type double.
228		*/
229		@Override
230		public double doubleValue() {
231	18	return value;
232		}
233
234		//-----------------------------------------------------------------------
235		/**
236		* Gets this mutable as an instance of Double.
237		*
238		* @return a Double instance containing the value from this mutable, never null
239		*/
240		public Double toDouble() {
241	2	return Double.valueOf(doubleValue());
242		}
243
244		//-----------------------------------------------------------------------
245		/**
246		* Compares this object against the specified object. The result is <code>true</code> if and only if the argument
247		* is not <code>null</code> and is a <code>Double</code> object that represents a double that has the identical
248		* bit pattern to the bit pattern of the double represented by this object. For this purpose, two
249		* <code>double</code> values are considered to be the same if and only if the method
250		* {@link Double#doubleToLongBits(double)}returns the same long value when applied to each.
251		* <p>
252		* Note that in most cases, for two instances of class <code>Double</code>,<code>d1</code> and <code>d2</code>,
253		* the value of <code>d1.equals(d2)</code> is <code>true</code> if and only if <blockquote>
254		*
255		* <pre>
256		* d1.doubleValue() == d2.doubleValue()
257		* </pre>
258		*
259		* </blockquote>
260		* <p>
261		* also has the value <code>true</code>. However, there are two exceptions:
262		* <ul>
263		* <li>If <code>d1</code> and <code>d2</code> both represent <code>Double.NaN</code>, then the
264		* <code>equals</code> method returns <code>true</code>, even though <code>Double.NaN==Double.NaN</code> has
265		* the value <code>false</code>.
266		* <li>If <code>d1</code> represents <code>+0.0</code> while <code>d2</code> represents <code>-0.0</code>,
267		* or vice versa, the <code>equal</code> test has the value <code>false</code>, even though
268		* <code>+0.0==-0.0</code> has the value <code>true</code>. This allows hashtables to operate properly.
269		* </ul>
270		*
271		* @param obj the object to compare with, null returns false
272		* @return <code>true</code> if the objects are the same; <code>false</code> otherwise.
273		*/
274		@Override
275		public boolean equals(final Object obj) {
276	10	return obj instanceof MutableDouble
277		&& Double.doubleToLongBits(((MutableDouble) obj).value) == Double.doubleToLongBits(value);
278		}
279
280		/**
281		* Returns a suitable hash code for this mutable.
282		*
283		* @return a suitable hash code
284		*/
285		@Override
286		public int hashCode() {
287	7	final long bits = Double.doubleToLongBits(value);
288	7	return (int) (bits ^ bits >>> 32);
289		}
290
291		//-----------------------------------------------------------------------
292		/**
293		* Compares this mutable to another in ascending order.
294		*
295		* @param other the other mutable to compare to, not null
296		* @return negative if this is less, zero if equal, positive if greater
297		*/
298		@Override
299		public int compareTo(final MutableDouble other) {
300	4	final double anotherVal = other.value;
301	3	return Double.compare(value, anotherVal);
302		}
303
304		//-----------------------------------------------------------------------
305		/**
306		* Returns the String value of this mutable.
307		*
308		* @return the mutable value as a string
309		*/
310		@Override
311		public String toString() {
312	3	return String.valueOf(value);
313		}
314
315		}