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/*
 * Copyright 2015 the original author or authors.
 *
 * Licensed 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.gradle.tooling.internal.provider;

import com.google.common.collect.ImmutableSet;
import org.gradle.StartParameter;
import org.gradle.api.Transformer;
import org.gradle.tooling.internal.protocol.events.InternalTestDescriptor;
import org.gradle.tooling.internal.protocol.test.InternalJvmTestRequest;
import org.gradle.tooling.internal.provider.test.ProviderInternalJvmTestRequest;
import org.gradle.tooling.internal.provider.test.ProviderInternalTestExecutionRequest;
import org.gradle.util.CollectionUtils;

import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Set;

public class TestExecutionRequestAction extends SubscribableBuildAction {
    private final StartParameter startParameter;
    private final Set testDescriptors;
    private final Set classNames;
    private final Set internalJvmTestRequests;

    private TestExecutionRequestAction(BuildClientSubscriptions clientSubscriptions, StartParameter startParameter, ImmutableSet testDescriptors, Set providerClassNames, Set internalJvmTestRequests) {
        super(clientSubscriptions);
        this.startParameter = startParameter;
        this.testDescriptors = testDescriptors;
        this.classNames = providerClassNames;
        this.internalJvmTestRequests = internalJvmTestRequests;
    }

    // Unpacks the request to serialize across to the daemon and craetes instance of
    // TestExecutionRequestAction
    public static TestExecutionRequestAction create(BuildClientSubscriptions clientSubscriptions, StartParameter startParameter, ProviderInternalTestExecutionRequest testExecutionRequest) {
        final Collection testClassNames = testExecutionRequest.getTestClassNames();
        final Collection internalJvmTestRequests = testExecutionRequest.getInternalJvmTestRequests(Collections.emptyList());
        Set providerInternalJvmTestRequests = ImmutableSet.copyOf(toProviderInternalJvmTestRequest(internalJvmTestRequests, testClassNames));
        return new TestExecutionRequestAction(clientSubscriptions, startParameter,
                                                ImmutableSet.copyOf(testExecutionRequest.getTestExecutionDescriptors()),
                                                ImmutableSet.copyOf(testClassNames),
                                                providerInternalJvmTestRequests);
    }

    private static List toProviderInternalJvmTestRequest(Collection internalJvmTestRequests, Collection testClassNames) {
        // handle consumer < 2.7
        if(internalJvmTestRequests.isEmpty()){
            return CollectionUtils.collect(testClassNames, new Transformer() {
                @Override
                public InternalJvmTestRequest transform(String testClass) {
                    return new ProviderInternalJvmTestRequest(testClass, null);
                }
            });
        } else {
            return CollectionUtils.collect(internalJvmTestRequests, new Transformer() {
                @Override
                public InternalJvmTestRequest transform(InternalJvmTestRequest internalTestMethod) {
                    return new ProviderInternalJvmTestRequest(internalTestMethod.getClassName(), internalTestMethod.getMethodName());
                }
            });
        }
    }

    @Override
    public StartParameter getStartParameter() {
        return startParameter;
    }

    public Collection getTestClassNames() {
        return classNames;
    }

    public Collection getInternalJvmTestRequests() {
        return internalJvmTestRequests;
    }

    public Collection getTestExecutionDescriptors() {
        return testDescriptors;
    }
}