org.sonar.server.computation.measure.api.MeasureComputerDefinitionImpl.java Source code

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Here is the source code for org.sonar.server.computation.measure.api.MeasureComputerDefinitionImpl.java

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/*
 * SonarQube
 * Copyright (C) 2009-2016 SonarSource SA
 * mailto:contact 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.server.computation.measure.api;

import com.google.common.collect.ImmutableSet;
import java.util.Set;
import javax.annotation.CheckForNull;
import javax.annotation.Nullable;
import org.sonar.api.ce.measure.MeasureComputer;

import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;

public class MeasureComputerDefinitionImpl implements MeasureComputer.MeasureComputerDefinition {

    private final Set<String> inputMetricKeys;
    private final Set<String> outputMetrics;

    private MeasureComputerDefinitionImpl(BuilderImpl builder) {
        this.inputMetricKeys = ImmutableSet.copyOf(builder.inputMetricKeys);
        this.outputMetrics = ImmutableSet.copyOf(builder.outputMetrics);
    }

    @Override
    public Set<String> getInputMetrics() {
        return inputMetricKeys;
    }

    @Override
    public Set<String> getOutputMetrics() {
        return outputMetrics;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        MeasureComputerDefinitionImpl that = (MeasureComputerDefinitionImpl) o;

        if (!inputMetricKeys.equals(that.inputMetricKeys)) {
            return false;
        }
        return outputMetrics.equals(that.outputMetrics);
    }

    @Override
    public int hashCode() {
        int result = inputMetricKeys.hashCode();
        result = 31 * result + outputMetrics.hashCode();
        return result;
    }

    @Override
    public String toString() {
        return "MeasureComputerDefinitionImpl{" + "inputMetricKeys=" + inputMetricKeys + ", outputMetrics="
                + outputMetrics + '}';
    }

    public static class BuilderImpl implements Builder {

        private String[] inputMetricKeys = new String[] {};
        @CheckForNull
        private String[] outputMetrics;

        @Override
        public Builder setInputMetrics(String... inputMetrics) {
            this.inputMetricKeys = validateInputMetricKeys(inputMetrics);
            return this;
        }

        @Override
        public Builder setOutputMetrics(String... outputMetrics) {
            this.outputMetrics = validateOutputMetricKeys(outputMetrics);
            return this;
        }

        @Override
        public MeasureComputer.MeasureComputerDefinition build() {
            validateInputMetricKeys(this.inputMetricKeys);
            validateOutputMetricKeys(this.outputMetrics);
            return new MeasureComputerDefinitionImpl(this);
        }

        private static String[] validateInputMetricKeys(@Nullable String[] inputMetrics) {
            requireNonNull(inputMetrics, "Input metrics cannot be null");
            checkNotNull(inputMetrics);
            return inputMetrics;
        }

        private static String[] validateOutputMetricKeys(@Nullable String[] outputMetrics) {
            requireNonNull(outputMetrics, "Output metrics cannot be null");
            checkArgument(outputMetrics.length > 0, "At least one output metric must be defined");
            checkNotNull(outputMetrics);
            return outputMetrics;
        }

        private static void checkNotNull(String[] metrics) {
            for (String metric : metrics) {
                requireNonNull(metric, "Null metric is not allowed");
            }
        }
    }
}