org.grails.cli.gradle.cache.MapReadingCachedGradleOperation.groovy Maven / Gradle / Ivy

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/*
 * Copyright 2015-2023 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
 *
 *      https://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.grails.cli.gradle.cache

import groovy.transform.CompileStatic
import groovy.transform.InheritConstructors
import org.yaml.snakeyaml.DumperOptions
import org.yaml.snakeyaml.LoaderOptions
import org.yaml.snakeyaml.Yaml
import org.yaml.snakeyaml.constructor.SafeConstructor
import org.yaml.snakeyaml.representer.Representer

/**
 * Cached Gradle operation that reads a Map
 *
 * @author Graeme Rocher
 * @since 3.1
 */
@InheritConstructors
@CompileStatic
abstract class MapReadingCachedGradleOperation extends CachedGradleOperation> {

    @Override
    Map readFromCached(File f) {
        def map = (Map) f.withReader { BufferedReader r ->
            new Yaml(new SafeConstructor(new LoaderOptions())).load(r)
        }
        Map newMap = [:]

        for (entry in map.entrySet()) {
            newMap.put(entry.key, createMapValue(entry.value))
        }
        newMap
    }

    abstract V createMapValue(Object value)

    @Override
    void writeToCache(PrintWriter writer, Map data) {
        def options = new DumperOptions()
        options.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK)
        Map toWrite = data.collectEntries { String key, V val ->
            if (val instanceof Iterable) {
                return [(key): val.collect { it.toString() }]
            }
            [(key): val.toString()]
        }
        new Yaml(new SafeConstructor(new LoaderOptions()), new Representer(new DumperOptions()), options).dump(toWrite, writer)
    }

}