com.palantir.docker.compose.configuration.AdditionalEnvironmentValidator.java Source code

Introduction

Here is the source code for com.palantir.docker.compose.configuration.AdditionalEnvironmentValidator.java

Source

/*
 * Copyright 2016 Palantir Technologies, Inc. All rights reserved.
 *
 * 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 com.palantir.docker.compose.configuration;

import static com.google.common.base.Preconditions.checkState;
import static com.palantir.docker.compose.configuration.EnvironmentVariables.DOCKER_CERT_PATH;
import static com.palantir.docker.compose.configuration.EnvironmentVariables.DOCKER_HOST;
import static com.palantir.docker.compose.configuration.EnvironmentVariables.DOCKER_TLS_VERIFY;

import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;

public final class AdditionalEnvironmentValidator {

    private static final Set<String> ILLEGAL_VARIABLES = ImmutableSet.of(DOCKER_TLS_VERIFY, DOCKER_HOST,
            DOCKER_CERT_PATH);

    private AdditionalEnvironmentValidator() {
    }

    public static Map<String, String> validate(Map<String, String> additionalEnvironment) {
        Set<String> invalidVariables = Sets.intersection(additionalEnvironment.keySet(), ILLEGAL_VARIABLES);
        String errorMessage = invalidVariables.stream().collect(Collectors.joining(", ",
                "The following variables: ",
                " cannot exist in your additional environment variable block as they will interfere with Docker."));
        checkState(invalidVariables.isEmpty(), errorMessage);
        return additionalEnvironment;
    }
}