Apache
/
commons-math
mirror of https://github.com/apache/commons-math.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

MATH-792: 

- definition of RealVectorChangingVisitor,
  - various methods to visit the entries of a RealVector (entries are possibly modified),
  - default implementation in RealVector abstract class,
  - unit tests in abstract RealVectorAbstractClass.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1343342 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Sebastien Brisard 2012-05-28 18:03:44 +00:00
parent 8aa20ce2a8
commit 209f22fc1c
5 changed files with 516 additions and 147 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

172
checkstyle.xml
View File

@ -1,196 +1,118 @@
<?xml version="1.0"?>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.3//EN" "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
<!--
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.
-->
<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.1//EN" "http://www.puppycrawl.com/dtds/configuration_1_1.dtd">
<!-- commons math customization of default Checkstyle behavior -->
This configuration file was written by the eclipse-cs plugin configuration editor
-->
<!--
Checkstyle-Configuration: commons-math3
Description: none
-->
<module name="Checker">
<property name="severity" value="warning"/>
<property name="localeLanguage" value="en"/>
<module name="TreeWalker">
<property name="cacheFile" value="target/checkstyle-cachefile"/>
<!-- Operator must be at end of wrapped line -->
<module name="FileContentsHolder"/>
<module name="OperatorWrap">
<property name="option" value="eol"/>
</module>
<!-- No if/else/do/for/while without braces -->
<module name="NeedBraces"/>
<!-- Interfaces must be types (not just constants) -->
<module name="InterfaceIsType"/>
<!-- Must have class / interface header comments including scm version -->
<module name="JavadocType">
<property name="versionFormat" value="\$Id.*\$"/>
<property name="versionFormat" value="\$Id.*\$"/>
</module>
<!-- Require method javadocs, allow undeclared RTE -->
<module name="JavadocMethod">
<property name="allowUndeclaredRTE" value="true"/>
</module>
<!-- Require field javadoc -->
<module name="JavadocVariable"/>
<!-- No public fields -->
<module name="VisibilityModifier">
<property name="protectedAllowed" value="true"/>
<property name="protectedAllowed" value="true"/>
</module>
<!-- Require hash code override when equals is -->
<module name="EqualsHashCode"/>
<!-- Disallow unnecessary instantiation of Boolean, String -->
<module name="IllegalInstantiation">
<property name="classes" value="java.lang.Boolean, java.lang.String"/>
</module>
<!-- Required for SuppressionCommentFilter below -->
<module name="FileContentsHolder"/>
<!-- Import should be explicit, really needed and only from pure java packages -->
<module name="AvoidStarImport" />
<module name="UnusedImports" />
<module name="IllegalImport" />
<!-- Utility class should not be instantiated, they must have a private constructor -->
<module name="HideUtilityClassConstructor" />
<!-- Switch statements should be complete and with independent cases -->
<module name="FallThrough" />
<module name="MissingSwitchDefault" />
<!-- Constant names should obey the traditional all uppercase naming convention -->
<module name="ConstantName" />
<!-- Method parameters and local variables should not hide fields, except in constructors and setters -->
<module name="AvoidStarImport"/>
<module name="UnusedImports"/>
<module name="IllegalImport"/>
<module name="HideUtilityClassConstructor"/>
<module name="FallThrough"/>
<module name="MissingSwitchDefault"/>
<module name="ConstantName"/>
<module name="HiddenField">
<property name="ignoreConstructorParameter" value="true" />
<property name="ignoreSetter" value="true" />
<property name="ignoreConstructorParameter" value="true"/>
<property name="ignoreSetter" value="true"/>
</module>
<!-- No trailing whitespace -->
<module name="Regexp">
<property name="format" value="[ \t]+$"/>
<property name="illegalPattern" value="true"/>
<property name="message" value="Trailing whitespace"/>
<property name="illegalPattern" value="true"/>
</module>
<!-- No System.out.println() statements -->
<module name="Regexp">
<!-- no sysouts -->
<property name="format" value="System\.out\.println"/>
<property name="illegalPattern" value="true"/>
</module>
<!-- Authors should be in pom.xml file -->
<module name="Regexp">
<property name="format" value="@author"/>
<property name="illegalPattern" value="true"/>
<property name="message" value="developers names should be in pom file"/>
<property name="illegalPattern" value="true"/>
</module>
<!-- Use a consistent way to put modifiers -->
<module name="RedundantModifier" />
<module name="ModifierOrder" />
<!-- Use a consistent way to put declarations -->
<module name="DeclarationOrder" />
<!-- Don't add up parentheses when they are not required -->
<module name="UnnecessaryParentheses" />
<!-- Don't use too widespread catch (Exception, Throwable, RuntimeException) -->
<module name="IllegalCatch" />
<!-- Don't use = or != for string comparisons -->
<module name="StringLiteralEquality" />
<!-- Don't declare multiple variables in the same statement -->
<module name="MultipleVariableDeclarations" />
<!-- String literals more than one character long should not be repeated several times -->
<!-- the "unchecked" string is also accepted to allow @SuppressWarnings("unchecked") -->
<module name="MultipleStringLiterals" >
<property name="ignoreStringsRegexp" value='^(("")|(".")|("unchecked"))$'/>
<module name="RedundantModifier"/>
<module name="ModifierOrder"/>
<module name="DeclarationOrder"/>
<module name="UnnecessaryParentheses"/>
<module name="IllegalCatch"/>
<module name="StringLiteralEquality"/>
<module name="MultipleVariableDeclarations"/>
<module name="MultipleStringLiterals">
<property name="ignoreStringsRegexp" value="^((&quot;&quot;)|(&quot;.&quot;)|(&quot;unchecked&quot;))$"/>
</module>
<!-- <module name="TodoComment" /> -->
<module name="LineLength"/>
</module>
<!-- Verify that EVERY source file has the appropriate license -->
<module name="Header">
<property name="headerFile" value="${checkstyle.header.file}"/>
</module>
<!-- No tabs allowed! -->
<module name="FileTabCharacter"/>
<!-- Require files to end with newline characters -->
<module name="NewlineAtEndOfFile"/>
<!-- Require package javadoc -->
<module name="JavadocPackage"/>
<!-- Setup special comments to suppress specific checks from source files -->
<module name="SuppressionCommentFilter">
<property name="offCommentFormat" value="CHECKSTYLE\: stop JavadocVariable"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume JavadocVariable"/>
<property name="checkFormat" value="JavadocVariable"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume JavadocVariable"/>
<property name="checkFormat" value="JavadocVariable"/>
</module>
<module name="SuppressionCommentFilter">
<property name="offCommentFormat" value="CHECKSTYLE\: stop JavadocMethodCheck"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume JavadocMethodCheck"/>
<property name="checkFormat" value="JavadocMethodCheck"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume JavadocMethodCheck"/>
<property name="checkFormat" value="JavadocMethodCheck"/>
</module>
<module name="SuppressionCommentFilter">
<property name="offCommentFormat" value="CHECKSTYLE\: stop ConstantName"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume ConstantName"/>
<property name="checkFormat" value="ConstantName"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume ConstantName"/>
<property name="checkFormat" value="ConstantName"/>
</module>
<module name="SuppressionCommentFilter">
<property name="offCommentFormat" value="CHECKSTYLE\: stop HideUtilityClassConstructor"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume HideUtilityClassConstructor"/>
<property name="checkFormat" value="HideUtilityClassConstructor"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume HideUtilityClassConstructor"/>
<property name="checkFormat" value="HideUtilityClassConstructor"/>
</module>
<module name="SuppressionCommentFilter">
<property name="offCommentFormat" value="CHECKSTYLE\: stop MultipleVariableDeclarations"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume MultipleVariableDeclarations"/>
<property name="checkFormat" value="MultipleVariableDeclarations"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume MultipleVariableDeclarations"/>
<property name="checkFormat" value="MultipleVariableDeclarations"/>
</module>
<module name="SuppressionCommentFilter">
<property name="offCommentFormat" value="CHECKSTYLE\: stop IllegalCatch"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume IllegalCatch"/>
<property name="checkFormat" value="IllegalCatch"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume IllegalCatch"/>
<property name="checkFormat" value="IllegalCatch"/>
</module>
<module name="SuppressionCommentFilter">
<property name="offCommentFormat" value="CHECKSTYLE\: stop DeclarationOrder"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume DeclarationOrder"/>
<property name="checkFormat" value="DeclarationOrder"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume DeclarationOrder"/>
<property name="checkFormat" value="DeclarationOrder"/>
</module>
<module name="SuppressionCommentFilter">
<property name="offCommentFormat" value="CHECKSTYLE\: stop all"/>
<property name="onCommentFormat" value="CHECKSTYLE\: resume all"/>
</module>
</module>

22
src/main/java/org/apache/commons/math3/linear/ArrayRealVector.java
View File

@ -881,4 +881,26 @@ public class ArrayRealVector extends RealVector implements Serializable {
}
return this;
}
/** {@inheritDoc} */
@Override
public double walkInDefaultOrder(final RealVectorPreservingVisitor visitor) {
visitor.start(data.length, 0, data.length - 1);
for (int i = 0; i < data.length; i++) {
visitor.visit(i, data[i]);
}
return visitor.end();
}
/** {@inheritDoc} */
@Override
public double walkInDefaultOrder(final RealVectorPreservingVisitor visitor,
final int start, final int end) {
checkIndices(start, end);
visitor.start(data.length, start, end);
for (int i = start; i <= end; i++) {
visitor.visit(i, data[i]);
}
return visitor.end();
}
}

90
src/main/java/org/apache/commons/math3/linear/RealVector.java
View File

@ -835,7 +835,7 @@ public abstract class RealVector {
/**
* Visits (but does not change) all entries of this vector in default order
* Visits (but does not alter) all entries of this vector in default order
* (increasing index).
*
* @param visitor the visitor to be used to process the entries of this
@ -853,7 +853,7 @@ public abstract class RealVector {
}
/**
* Visits (and possibly change) some entries of this vector in default order
* Visits (but does not alter) some entries of this vector in default order
* (increasing index).
*
* @param visitor visitor to be used to process the entries of this vector
@ -865,7 +865,7 @@ public abstract class RealVector {
* the indices are not valid.
*/
public double walkInDefaultOrder(final RealVectorPreservingVisitor visitor,
int start, int end) {
int start, int end) {
checkIndices(start, end);
visitor.start(getDimension(), start, end);
for (int i = start; i <= end; i++) {
@ -875,7 +875,7 @@ public abstract class RealVector {
}
/**
* Visits (but does not change) all entries of this vector in optimized
* Visits (but does not alter) all entries of this vector in optimized
* order. The order in which the entries are visited is selected so as to
* lead to the most efficient implementation; it might depend on the
* concrete implementation of this abstract class.
@ -890,10 +890,10 @@ public abstract class RealVector {
}
/**
* Visits (and possibly change) some entries of this vector in default order
* (increasing index). The order in which the entries are visited is
* selected so as to lead to the most efficient implementation; it might
* depend on the concrete implementation of this abstract class.
* Visits (but does not alter) some entries of this vector in optimized
* order. The order in which the entries are visited is selected so as to
* lead to the most efficient implementation; it might depend on the
* concrete implementation of this abstract class.
*
* @param visitor visitor to be used to process the entries of this vector
* @param start the index of the first entry to be visited
@ -908,6 +908,80 @@ public abstract class RealVector {
return walkInDefaultOrder(visitor, start, end);
}
/**
* Visits (and possibly alters) all entries of this vector in default order
* (increasing index).
*
* @param visitor the visitor to be used to process and modify the entries
* of this vector
* @return the value returned by {@link RealVectorChangingVisitor#end()}
* at the end of the walk
*/
public double walkInDefaultOrder(final RealVectorChangingVisitor visitor) {
final int dim = getDimension();
visitor.start(dim, 0, dim - 1);
for (int i = 0; i < dim; i++) {
setEntry(i, visitor.visit(i, getEntry(i)));
}
return visitor.end();
}
/**
* Visits (and possibly alters) some entries of this vector in default order
* (increasing index).
*
* @param visitor visitor to be used to process the entries of this vector
* @param start the index of the first entry to be visited
* @param end the index of the last entry to be visited (inclusive)
* @return the value returned by {@link RealVectorChangingVisitor#end()}
* at the end of the walk
* @throws org.apache.commons.math3.exception.OutOfRangeException if
* the indices are not valid.
*/
public double walkInDefaultOrder(final RealVectorChangingVisitor visitor,
int start, int end) {
checkIndices(start, end);
visitor.start(getDimension(), start, end);
for (int i = start; i <= end; i++) {
setEntry(i, visitor.visit(i, getEntry(i)));
}
return visitor.end();
}
/**
* Visits (and possibly alters) all entries of this vector in optimized
* order. The order in which the entries are visited is selected so as to
* lead to the most efficient implementation; it might depend on the
* concrete implementation of this abstract class.
*
* @param visitor the visitor to be used to process the entries of this
* vector
* @return the value returned by {@link RealVectorChangingVisitor#end()}
* at the end of the walk
*/
public double walkInOptimizedOrder(final RealVectorChangingVisitor visitor) {
return walkInDefaultOrder(visitor);
}
/**
* Visits (and possibly change) some entries of this vector in optimized
* order. The order in which the entries are visited is selected so as to
* lead to the most efficient implementation; it might depend on the
* concrete implementation of this abstract class.
*
* @param visitor visitor to be used to process the entries of this vector
* @param start the index of the first entry to be visited
* @param end the index of the last entry to be visited (inclusive)
* @return the value returned by {@link RealVectorChangingVisitor#end()}
* at the end of the walk
* @throws org.apache.commons.math3.exception.OutOfRangeException if
* the indices are not valid.
*/
public double walkInOptimizedOrder(final RealVectorChangingVisitor visitor,
int start, int end) {
return walkInDefaultOrder(visitor, start, end);
}
/** An entry in the vector. */
protected class Entry {
/** Index of this entry. */

59
src/main/java/org/apache/commons/math3/linear/RealVectorChangingVisitor.java Normal file
View File

@ -0,0 +1,59 @@
/*
* 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.linear;
/**
* This interface defines a visitor for the entries of a vector. Visitors
* implementing this interface may alter the entries of the vector being
* visited.
*
* @version $Id$
* @since 3.1
*/
public interface RealVectorChangingVisitor {
/**
* Start visiting a vector. This method is called once, before any entry
* of the vector is visited.
*
* @param dimension the size of the vector
* @param start the index of the first entry to be visited
* @param end the index of the last entry to be visited (inclusive)
*/
void start(int dimension, int start, int end);
/**
* Visit one entry of the vector.
*
* @param index the index of the entry being visited
* @param value the value of the entry being visited
* @return the new value of the entry being visited
*/
double visit(int index, double value);
/**
* End visiting a vector. This method is called once, after all entries of
* the vector have been visited.
*
* @return the value returned by
* {@link RealVector#walkInDefaultOrder(RealVectorChangingVisitor)},
* {@link RealVector#walkInDefaultOrder(RealVectorChangingVisitor, int, int)},
* {@link RealVector#walkInOptimizedOrder(RealVectorChangingVisitor)}
* or
* {@link RealVector#walkInOptimizedOrder(RealVectorChangingVisitor, int, int)}
*/
double end();
}

320
src/test/java/org/apache/commons/math3/linear/RealVectorAbstractTest.java
View File

@ -41,7 +41,7 @@ public abstract class RealVectorAbstractTest {
}
public double end() {
return 0;
return 0.0;
}
};
v.walkInDefaultOrder(visitor);
@ -51,32 +51,47 @@ public abstract class RealVectorAbstractTest {
@Test
public void testWalkInDefaultOrderPreservingVisitor2() {
final RealVector v = create(new double[5]);
final RealVectorPreservingVisitor visitor;
visitor = new RealVectorPreservingVisitor() {
public void visit(int index, double value) {
// Do nothing
}
public void start(int dimension, int start, int end) {
// Do nothing
}
public double end() {
return 0.0;
}
};
try {
v.walkInDefaultOrder(null, -1, 4);
v.walkInDefaultOrder(visitor, -1, 4);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInDefaultOrder(null, 5, 4);
v.walkInDefaultOrder(visitor, 5, 4);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInDefaultOrder(null, 0, -1);
v.walkInDefaultOrder(visitor, 0, -1);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInDefaultOrder(null, 0, 5);
v.walkInDefaultOrder(visitor, 0, 5);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInDefaultOrder(null, 4, 0);
v.walkInDefaultOrder(visitor, 4, 0);
Assert.fail();
} catch (NumberIsTooSmallException e) {
// Expected behavior
@ -113,7 +128,7 @@ public abstract class RealVectorAbstractTest {
}
public double end() {
return 0;
return 0.0;
}
};
v.walkInDefaultOrder(visitor, expectedStart, expectedEnd);
@ -149,7 +164,7 @@ public abstract class RealVectorAbstractTest {
Assert.assertTrue("entry " + i + "has not been visited",
visited[i]);
}
return 0;
return 0.0;
}
};
v.walkInOptimizedOrder(visitor);
@ -159,32 +174,47 @@ public abstract class RealVectorAbstractTest {
@Test
public void testWalkInOptimizedOrderPreservingVisitor2() {
final RealVector v = create(new double[5]);
final RealVectorPreservingVisitor visitor;
visitor = new RealVectorPreservingVisitor() {
public void visit(int index, double value) {
// Do nothing
}
public void start(int dimension, int start, int end) {
// Do nothing
}
public double end() {
return 0.0;
}
};
try {
v.walkInOptimizedOrder(null, -1, 4);
v.walkInOptimizedOrder(visitor, -1, 4);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInOptimizedOrder(null, 5, 4);
v.walkInOptimizedOrder(visitor, 5, 4);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInOptimizedOrder(null, 0, -1);
v.walkInOptimizedOrder(visitor, 0, -1);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInOptimizedOrder(null, 0, 5);
v.walkInOptimizedOrder(visitor, 0, 5);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInOptimizedOrder(null, 4, 0);
v.walkInOptimizedOrder(visitor, 4, 0);
Assert.fail();
} catch (NumberIsTooSmallException e) {
// Expected behavior
@ -223,9 +253,271 @@ public abstract class RealVectorAbstractTest {
Assert.assertTrue("entry " + i + "has not been visited",
visited[i]);
}
return 0;
return 0.0;
}
};
v.walkInOptimizedOrder(visitor, expectedStart, expectedEnd);
}
/** The whole vector is visited. */
@Test
public void testWalkInDefaultOrderChangingVisitor1() {
final double[] data = new double[] {
0d, 1d, 0d, 0d, 2d, 0d, 0d, 0d, 3d
};
final RealVector v = create(data);
final RealVectorChangingVisitor visitor;
visitor = new RealVectorChangingVisitor() {
private int expectedIndex;
public double visit(final int actualIndex, final double actualValue) {
Assert.assertEquals(expectedIndex, actualIndex);
Assert.assertEquals(Integer.toString(actualIndex),
data[actualIndex], actualValue, 0d);
++expectedIndex;
return actualIndex + actualValue;
}
public void start(final int actualSize, final int actualStart,
final int actualEnd) {
Assert.assertEquals(data.length, actualSize);
Assert.assertEquals(0, actualStart);
Assert.assertEquals(data.length - 1, actualEnd);
expectedIndex = 0;
}
public double end() {
return 0.0;
}
};
v.walkInDefaultOrder(visitor);
for (int i = 0; i < data.length; i++) {
Assert.assertEquals("entry " + i, i + data[i], v.getEntry(i), 0.0);
}
}
/** Visiting an invalid subvector. */
@Test
public void testWalkInDefaultOrderChangingVisitor2() {
final RealVector v = create(new double[5]);
final RealVectorChangingVisitor visitor;
visitor = new RealVectorChangingVisitor() {
public double visit(int index, double value) {
return 0.0;
}
public void start(int dimension, int start, int end) {
// Do nothing
}
public double end() {
return 0.0;
}
};
try {
v.walkInDefaultOrder(visitor, -1, 4);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInDefaultOrder(visitor, 5, 4);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInDefaultOrder(visitor, 0, -1);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInDefaultOrder(visitor, 0, 5);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInDefaultOrder(visitor, 4, 0);
Assert.fail();
} catch (NumberIsTooSmallException e) {
// Expected behavior
}
}
/** Visiting a valid subvector. */
@Test
public void testWalkInDefaultOrderChangingVisitor3() {
final double[] data = new double[] {
0d, 1d, 0d, 0d, 2d, 0d, 0d, 0d, 3d
};
final int expectedStart = 2;
final int expectedEnd = 7;
final RealVector v = create(data);
final RealVectorChangingVisitor visitor;
visitor = new RealVectorChangingVisitor() {
private int expectedIndex;
public double visit(final int actualIndex, final double actualValue) {
Assert.assertEquals(expectedIndex, actualIndex);
Assert.assertEquals(Integer.toString(actualIndex),
data[actualIndex], actualValue, 0d);
++expectedIndex;
return actualIndex + actualValue;
}
public void start(final int actualSize, final int actualStart,
final int actualEnd) {
Assert.assertEquals(data.length, actualSize);
Assert.assertEquals(expectedStart, actualStart);
Assert.assertEquals(expectedEnd, actualEnd);
expectedIndex = expectedStart;
}
public double end() {
return 0.0;
}
};
v.walkInDefaultOrder(visitor, expectedStart, expectedEnd);
for (int i = expectedStart; i <= expectedEnd; i++) {
Assert.assertEquals("entry " + i, i + data[i], v.getEntry(i), 0.0);
}
}
/** The whole vector is visited. */
@Test
public void testWalkInOptimizedOrderChangingVisitor1() {
final double[] data = new double[] {
0d, 1d, 0d, 0d, 2d, 0d, 0d, 0d, 3d
};
final RealVector v = create(data);
final RealVectorChangingVisitor visitor;
visitor = new RealVectorChangingVisitor() {
private final boolean[] visited = new boolean[data.length];
public double visit(final int actualIndex, final double actualValue) {
visited[actualIndex] = true;
Assert.assertEquals(Integer.toString(actualIndex),
data[actualIndex], actualValue, 0d);
return actualIndex + actualValue;
}
public void start(final int actualSize, final int actualStart,
final int actualEnd) {
Assert.assertEquals(data.length, actualSize);
Assert.assertEquals(0, actualStart);
Assert.assertEquals(data.length - 1, actualEnd);
Arrays.fill(visited, false);
}
public double end() {
for (int i = 0; i < data.length; i++) {
Assert.assertTrue("entry " + i + "has not been visited",
visited[i]);
}
return 0.0;
}
};
v.walkInOptimizedOrder(visitor);
for (int i = 0; i < data.length; i++) {
Assert.assertEquals("entry " + i, i + data[i], v.getEntry(i), 0.0);
}
}
/** Visiting an invalid subvector. */
@Test
public void testWalkInOptimizedOrderChangingVisitor2() {
final RealVector v = create(new double[5]);
final RealVectorChangingVisitor visitor;
visitor = new RealVectorChangingVisitor() {
public double visit(int index, double value) {
return 0.0;
}
public void start(int dimension, int start, int end) {
// Do nothing
}
public double end() {
return 0.0;
}
};
try {
v.walkInOptimizedOrder(visitor, -1, 4);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInOptimizedOrder(visitor, 5, 4);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInOptimizedOrder(visitor, 0, -1);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInOptimizedOrder(visitor, 0, 5);
Assert.fail();
} catch (OutOfRangeException e) {
// Expected behavior
}
try {
v.walkInOptimizedOrder(visitor, 4, 0);
Assert.fail();
} catch (NumberIsTooSmallException e) {
// Expected behavior
}
}
/** Visiting a valid subvector. */
@Test
public void testWalkInOptimizedOrderChangingVisitor3() {
final double[] data = new double[] {
0d, 1d, 0d, 0d, 2d, 0d, 0d, 0d, 3d
};
final int expectedStart = 2;
final int expectedEnd = 7;
final RealVector v = create(data);
final RealVectorChangingVisitor visitor;
visitor = new RealVectorChangingVisitor() {
private final boolean[] visited = new boolean[data.length];
public double visit(final int actualIndex, final double actualValue) {
Assert.assertEquals(Integer.toString(actualIndex),
data[actualIndex], actualValue, 0d);
visited[actualIndex] = true;
return actualIndex + actualValue;
}
public void start(final int actualSize, final int actualStart,
final int actualEnd) {
Assert.assertEquals(data.length, actualSize);
Assert.assertEquals(expectedStart, actualStart);
Assert.assertEquals(expectedEnd, actualEnd);
Arrays.fill(visited, true);
}
public double end() {
for (int i = expectedStart; i <= expectedEnd; i++) {
Assert.assertTrue("entry " + i + "has not been visited",
visited[i]);
}
return 0.0;
}
};
v.walkInOptimizedOrder(visitor, expectedStart, expectedEnd);
for (int i = expectedStart; i <= expectedEnd; i++) {
Assert.assertEquals("entry " + i, i + data[i], v.getEntry(i), 0.0);
}
}
}