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| <div class="sub-title"><span class="module-label-in-type">Module</span> <a href="../../../../../module-summary.html">org.apache.sis.referencing</a></div> |
| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.sis.referencing.cs</a></div> |
| <h1 title="Interface AxisFilter" class="title">Interface AxisFilter</h1> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><code><a href="AxesConvention.html" title="enum class in org.apache.sis.referencing.cs">AxesConvention</a></code></dd> |
| </dl> |
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| <div class="type-signature"><span class="modifiers">public interface </span><span class="element-name type-name-label">AxisFilter</span></div> |
| <div class="block">Modifications to apply on the axes of a coordinate system in order to produce a new coordinate system. |
| <code>AxisFilter</code> can specify the axes to exclude in the new coordinate system, or specify different |
| units and directions associated to the axes. |
| |
| <div class="note"><b>Terminology note</b> |
| the word <cite>“filter”</cite> is understood here as <cite>“a computer program or subroutine to process a stream, |
| producing another stream”</cite> (<a href="https://en.wikipedia.org/wiki/Filter_%28software%29">Wikipedia</a>). |
| </div> |
| |
| <p>Note that filtering one or more axes may result in a change of coordinate system type. |
| For example, excluding the <var>z</var> axis of a <a href="DefaultCylindricalCS.html" title="class in org.apache.sis.referencing.cs">cylindrical</a> coordinate system |
| results in a <a href="DefaultPolarCS.html" title="class in org.apache.sis.referencing.cs">polar</a> coordinate system.</p> |
| |
| <h2 id="default-implementation-heading">Default implementation</h2> |
| All methods in this interface have a default implementation equivalent to <i>no-operation</i>. |
| Implementers need to override only the methods for the aspects to change. |
| |
| <h2 id="limitations-heading">Limitations</h2> |
| This interface is not for changing axis order. |
| For changing axis order in addition to axis directions or units, see <a href="AxesConvention.html" title="enum class in org.apache.sis.referencing.cs"><code>AxesConvention</code></a>.</div> |
| <dl class="notes"> |
| <dt>Since:</dt> |
| <dd>0.6</dd> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="tag-list-long"> |
| <li><a href="CoordinateSystems.html#replaceAxes(org.opengis.referencing.cs.CoordinateSystem,org.apache.sis.referencing.cs.AxisFilter)"><code>CoordinateSystems.replaceAxes(CoordinateSystem, AxisFilter)</code></a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| <section class="summary"> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
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| <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default boolean</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#accept(org.opengis.referencing.cs.CoordinateSystemAxis)" class="member-name-link">accept</a><wbr>(<a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/referencing/cs/CoordinateSystemAxis.html" title="class or interface in org.opengis.referencing.cs" class="external-link">CoordinateSystemAxis</a> axis)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Returns <code>true</code> if the given axis shall be included in the new coordinate system.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default <a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/referencing/cs/AxisDirection.html" title="class or interface in org.opengis.referencing.cs" class="external-link">AxisDirection</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#getDirectionReplacement(org.opengis.referencing.cs.CoordinateSystemAxis,org.opengis.referencing.cs.AxisDirection)" class="member-name-link">getDirectionReplacement</a><wbr>(<a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/referencing/cs/CoordinateSystemAxis.html" title="class or interface in org.opengis.referencing.cs" class="external-link">CoordinateSystemAxis</a> axis, |
| <a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/referencing/cs/AxisDirection.html" title="class or interface in org.opengis.referencing.cs" class="external-link">AxisDirection</a> direction)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Returns a replacement for the given axis direction.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default <a href="http://unitsofmeasurement.github.io/unit-api/site/apidocs/javax/measure/Unit.html" title="class or interface in javax.measure" class="external-link">Unit</a><wbr><?></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#getUnitReplacement(org.opengis.referencing.cs.CoordinateSystemAxis,javax.measure.Unit)" class="member-name-link">getUnitReplacement</a><wbr>(<a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/referencing/cs/CoordinateSystemAxis.html" title="class or interface in org.opengis.referencing.cs" class="external-link">CoordinateSystemAxis</a> axis, |
| <a href="http://unitsofmeasurement.github.io/unit-api/site/apidocs/javax/measure/Unit.html" title="class or interface in javax.measure" class="external-link">Unit</a><?> unit)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Returns a replacement for the given axis unit.</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="accept(org.opengis.referencing.cs.CoordinateSystemAxis)"> |
| <h3>accept</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type">boolean</span> <span class="element-name">accept</span><wbr><span class="parameters">(<a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/referencing/cs/CoordinateSystemAxis.html" title="class or interface in org.opengis.referencing.cs" class="external-link">CoordinateSystemAxis</a> axis)</span></div> |
| <div class="block">Returns <code>true</code> if the given axis shall be included in the new coordinate system. |
| The default implementation unconditionally returns <code>true</code>.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>axis</code> - the axis to test.</dd> |
| <dt>Returns:</dt> |
| <dd><code>true</code> if the given axis shall be included in the new coordinate system.</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getDirectionReplacement(org.opengis.referencing.cs.CoordinateSystemAxis,org.opengis.referencing.cs.AxisDirection)"> |
| <h3>getDirectionReplacement</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type"><a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/referencing/cs/AxisDirection.html" title="class or interface in org.opengis.referencing.cs" class="external-link">AxisDirection</a></span> <span class="element-name">getDirectionReplacement</span><wbr><span class="parameters">(<a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/referencing/cs/CoordinateSystemAxis.html" title="class or interface in org.opengis.referencing.cs" class="external-link">CoordinateSystemAxis</a> axis, |
| <a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/referencing/cs/AxisDirection.html" title="class or interface in org.opengis.referencing.cs" class="external-link">AxisDirection</a> direction)</span></div> |
| <div class="block">Returns a replacement for the given axis direction. |
| The default implementation unconditionally returns the given <code>direction</code> unchanged. |
| |
| <h4 id="example-heading">Example</h4> |
| For forcing the direction of the <var>z</var> axis toward up while leaving other axes unchanged, |
| one can write: |
| |
| |
| <div class="snippet-container"><button class="copy snippet-copy" aria-label="Copy snippet" onclick="copySnippet(this)"><span data-copied="Copied!">Copy</span><img src="../../../../../../copy.svg" alt="Copy snippet"></button> |
| <pre class="snippet"><code class="language-java"> @Override |
| public getDirectionReplacement(CoordinateSystemAxis axis, AxisDirection direction) { |
| if (direction == AxisDirection.DOWN) { |
| direction = AxisDirection.UP; |
| } |
| return direction; |
| } |
| </code></pre> |
| </div> |
| </div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>axis</code> - the axis for which to change axis direction, if desired.</dd> |
| <dd><code>direction</code> - the original axis direction.</dd> |
| <dt>Returns:</dt> |
| <dd>the new axis direction, or <code>direction</code> if there is no change.</dd> |
| <dt>Since:</dt> |
| <dd>0.7</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getUnitReplacement(org.opengis.referencing.cs.CoordinateSystemAxis,javax.measure.Unit)"> |
| <h3>getUnitReplacement</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type"><a href="http://unitsofmeasurement.github.io/unit-api/site/apidocs/javax/measure/Unit.html" title="class or interface in javax.measure" class="external-link">Unit</a><?></span> <span class="element-name">getUnitReplacement</span><wbr><span class="parameters">(<a href="http://www.geoapi.org/3.0/javadoc/org.opengis.geoapi/org/opengis/referencing/cs/CoordinateSystemAxis.html" title="class or interface in org.opengis.referencing.cs" class="external-link">CoordinateSystemAxis</a> axis, |
| <a href="http://unitsofmeasurement.github.io/unit-api/site/apidocs/javax/measure/Unit.html" title="class or interface in javax.measure" class="external-link">Unit</a><?> unit)</span></div> |
| <div class="block">Returns a replacement for the given axis unit. |
| The default implementation unconditionally returns the given <code>unit</code> unchanged. |
| |
| <h4 id="example-heading1">Example</h4> |
| For replacing all angular units of a coordinate system to degrees (regardless what the original |
| angular units were) while leaving other kinds of units unchanged, one can write: |
| |
| |
| <div class="snippet-container"><button class="copy snippet-copy" aria-label="Copy snippet" onclick="copySnippet(this)"><span data-copied="Copied!">Copy</span><img src="../../../../../../copy.svg" alt="Copy snippet"></button> |
| <pre class="snippet"><code class="language-java"> @Override |
| public Unit<?> getUnitReplacement(CoordinateSystemAxis axis, Unit<?> unit) { |
| if (Units.isAngular(unit)) { |
| unit = Units.DEGREE; |
| } |
| return unit; |
| } |
| </code></pre> |
| </div> |
| </div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>axis</code> - the axis for which to change unit, if desired.</dd> |
| <dd><code>unit</code> - the original axis unit.</dd> |
| <dt>Returns:</dt> |
| <dd>the new axis unit, or <code>unit</code> if there is no change.</dd> |
| <dt>Since:</dt> |
| <dd>0.7</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
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