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Plugin API for SonarQube, SonarCloud and SonarLint
/*
* Sonar Plugin API
* Copyright (C) 2009-2022 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.api.ce.measure;
import java.util.List;
import java.util.Set;
import javax.annotation.CheckForNull;
import org.sonar.api.ExtensionPoint;
import org.sonar.api.ce.ComputeEngineSide;
import org.sonar.api.ce.measure.MeasureComputer.MeasureComputerDefinition.Builder;
/**
* Define how to compute new measures on some metrics declared by {@link org.sonar.api.measures.Metrics}.
*
* This interface replaces the deprecated class org.sonar.api.batch.Decorator.
*
*
How to use
*
* public class MyMeasureComputer implements MeasureComputer {
*
* {@literal @}Override
* public MeasureComputerDefinition define(MeasureComputerDefinitionContext defContext) {
* return defContext.newDefinitionBuilder()
*
* // Input metrics can be empty, for instance if only issues will be read
* .setInputMetrics("ncloc")
*
* // Output metrics must contains at least one metric
* .setOutputMetrics("my_new_metric")
*
* .build();
* }
*
* {@literal @}Override
* public void compute(MeasureComputerContext context) {
* int ncloc = context.getMeasure("ncloc");
* List<Issue> issues = context.getIssues();
* if (ncloc != null && !issues.isEmpty()) {
* double value = issues.size() / ncloc;
* context.addMeasure("my_new_metric", value);
* }
* }
* }
*
*
*
How to test
*
* public class MyMeasureComputerTest {
*
* MyMeasureComputer underTest = new MyMeasureComputer();
*
* {@literal @}Test
* public void test_definition() {
* TestMeasureComputerDefinitionContext defContext = new TestMeasureComputerDefinitionContext();
* MeasureComputerDefinition def = underTest.define(defContext);
* assertThat(def).isNotNull();
* assertThat(def.getInputMetrics()).containsOnly("ncloc");
* assertThat(def.getOutputMetrics()).containsOnly("my_new_metric");
* }
*
* {@literal @}Test
* public void sum_ncloc_and_issues() {
* TestMeasureComputerContext context = new TestMeasureComputerContext(underTest);
* context.addMeasure("ncloc", 2);
* context.setIssues(Arrays.asList(new TestIssue.Builder().setKey("ABCD").build()));
* underTest.compute(context);
*
* assertThat(context.getMeasureValue("my_new_metric")).isEqualTo(0.5);
* }
*
*
* @since 5.2
*/
@ComputeEngineSide
@ExtensionPoint
public interface MeasureComputer {
/**
* Use to define which metrics are required to compute some measures on some given metrics
*/
MeasureComputerDefinition define(MeasureComputerDefinitionContext defContext);
/**
* Context specific to the definition of the measure computer
*/
@FunctionalInterface
interface MeasureComputerDefinitionContext {
Builder newDefinitionBuilder();
}
interface MeasureComputerDefinition {
/**
* Return the metric keys that can be read using {@link MeasureComputerContext}.
* Can be empty for instance when the computer only need to access to issues.
*/
Set getInputMetrics();
/**
* Return the metric keys that can be create using {@link MeasureComputerContext}.
* Can never ne empty.
*/
Set getOutputMetrics();
interface Builder {
/**
* List of metric keys of the measures that will be loaded by this computer. It can be empty (for instance when only issues are needed).
* A metric must be either a {@link org.sonar.api.measures.CoreMetrics} or a metric provided by {@link org.sonar.api.measures.Metrics}
*
* @throws NullPointerException if inputMetrics is null
* @throws NullPointerException if the metrics contains a {@code null}
* */
Builder setInputMetrics(String... inputMetrics);
/**
* List of metric keys of the measures that can be added by this computer. At least one metric key must be defined.
*
* At runtime, the following conditions will be validated :
*
* - A metric must be defined by {@link org.sonar.api.measures.Metrics}
* - A metric cannot be a {@link org.sonar.api.measures.CoreMetrics}
* - A metric must be generated by only one {@link MeasureComputer}
*
*
* @throws NullPointerException if outputMetrics is null
* @throws IllegalArgumentException if there's not at least one output metrics
* @throws NullPointerException if the metrics contains a {@code null}
*/
Builder setOutputMetrics(String... outputMetrics);
/**
* @throws NullPointerException if inputMetrics is null
* @throws NullPointerException if inputs metrics contains a {@code null}
* @throws NullPointerException if outputMetrics is null
* @throws IllegalArgumentException if there's not at least one output metrics
* @throws NullPointerException if outputs metrics contains a {@code null}
*/
MeasureComputerDefinition build();
}
}
/**
* This method will be called on each component of the projects.
*/
void compute(MeasureComputerContext context);
/**
* Context specific to the computation of the measure(s) of a given component
*/
interface MeasureComputerContext {
/**
* Returns the current component.
*/
Component getComponent();
/**
* Returns settings of the current component.
*/
Settings getSettings();
/**
* Returns the measure from a given metric on the current component.
*
* @throws IllegalArgumentException if the metric is not listed in {@link MeasureComputerDefinition#getInputMetrics()}
*/
@CheckForNull
Measure getMeasure(String metric);
/**
* Returns measures from a given metric on children of the current component.
* It no measure is found for a child, this measure is ignored
*
* @throws IllegalArgumentException if the metric is not listed in {@link MeasureComputerDefinition#getInputMetrics()}
* or in {@link MeasureComputerDefinition#getOutputMetrics()}
*/
Iterable getChildrenMeasures(String metric);
/**
* Add a new measure of a given metric which measure type will be int
*
* @throws IllegalArgumentException if the metric is not listed in {@link MeasureComputerDefinition#getOutputMetrics()}
* @throws UnsupportedOperationException if a measure for the specified metric already exists for the current component
*/
void addMeasure(String metric, int value);
/**
* Add a new measure of a given metric which measure type will be double
*
* @throws IllegalArgumentException if the metric is not listed in {@link MeasureComputerDefinition#getOutputMetrics()}
* @throws UnsupportedOperationException if a measure for the specified metric already exists for the current component
*/
void addMeasure(String metric, double value);
/**
* Add a new measure of a given metric which measure type will be long
*
* @throws IllegalArgumentException if the metric is not listed in {@link MeasureComputerDefinition#getOutputMetrics()}
* @throws UnsupportedOperationException if a measure for the specified metric already exists for the current component
*/
void addMeasure(String metric, long value);
/**
* Add a new measure of a given metric which measure type will be string
*
* @throws IllegalArgumentException if the metric is not listed in {@link MeasureComputerDefinition#getOutputMetrics()}
* @throws UnsupportedOperationException if a measure for the specified metric already exists for the current component
*/
void addMeasure(String metric, String value);
/**
* Add a new measure of a given metric which measure type will be boolean
*
* @throws IllegalArgumentException if the metric is not listed in {@link MeasureComputerDefinition#getOutputMetrics()}
* @throws UnsupportedOperationException if a measure for the specified metric already exists for the current component
*/
void addMeasure(String metric, boolean value);
/**
* Return list of all issues (open, closed, etc.) of current component.
*/
List getIssues();
}
}