org.jclouds.googlecomputeengine.compute.functions.BuildInstanceMetadata.java Source code

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Here is the source code for org.jclouds.googlecomputeengine.compute.functions.BuildInstanceMetadata.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.jclouds.googlecomputeengine.compute.functions;

import static com.google.common.base.Preconditions.checkNotNull;
import static java.lang.String.format;

import javax.inject.Singleton;

import org.jclouds.compute.options.TemplateOptions;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableMap;

/**
 * Prepares metadata from the provided TemplateOptions
 */
@Singleton
public class BuildInstanceMetadata implements Function<TemplateOptions, ImmutableMap.Builder<String, String>> {

    @Override
    public ImmutableMap.Builder apply(TemplateOptions input) {
        ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
        if (input.getPublicKey() != null) {
            builder.put("sshKeys",
                    format("%s:%s %s@localhost", checkNotNull(input.getLoginUser(), "loginUser cannot be null"),
                            input.getPublicKey(), input.getLoginUser()));
        }
        builder.putAll(input.getUserMetadata());
        return builder;
    }

}