com.facebook.buck.jvm.java.JavacPluginJsr199FieldsSerializer.java Source code

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Here is the source code for com.facebook.buck.jvm.java.JavacPluginJsr199FieldsSerializer.java

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/*
 * Copyright 2017-present Facebook, Inc.
 *
 * 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.facebook.buck.jvm.java;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class JavacPluginJsr199FieldsSerializer {

    private static final String CAN_REUSE_CLASSPATH = "can_reuse_classpath";
    private static final String PROCESSOR_NAMES = "processor_names";
    private static final String CLASSPATH = "classpath";

    private JavacPluginJsr199FieldsSerializer() {
    }

    public static ImmutableMap<String, Object> serialize(JavacPluginJsr199Fields fields) {
        ImmutableMap.Builder<String, Object> builder = ImmutableMap.builder();

        builder.put(CAN_REUSE_CLASSPATH, fields.getCanReuseClassLoader());
        builder.put(PROCESSOR_NAMES, fields.getProcessorNames().asList());
        builder.put(CLASSPATH, fields.getClasspath().stream().map(URL::toString).collect(Collectors.toList()));

        return builder.build();
    }

    @SuppressWarnings("unchecked")
    public static JavacPluginJsr199Fields deserialize(Map<String, Object> data) {
        Boolean canReuseClasspath = (Boolean) data.get(CAN_REUSE_CLASSPATH);
        Preconditions.checkNotNull(canReuseClasspath);

        List<String> processorNames = (List<String>) data.get(PROCESSOR_NAMES);
        Preconditions.checkNotNull(processorNames);

        List<String> classpathAsStrings = (List<String>) data.get(CLASSPATH);
        Preconditions.checkNotNull(classpathAsStrings);

        List<URL> classpath = classpathAsStrings.stream().map(s -> {
            try {
                return new URL(s);
            } catch (MalformedURLException e) {
                throw new RuntimeException(
                        String.format("Error deserializing %s: can't convert string (%s) into URL",
                                JavacPluginJsr199Fields.class.getSimpleName(), s),
                        e);
            }
        }).collect(Collectors.toList());

        return JavacPluginJsr199Fields.builder().setCanReuseClassLoader(canReuseClasspath).setClasspath(classpath)
                .setProcessorNames(processorNames).build();
    }
}