com.google.api.tools.framework.importers.swagger.SwaggerFileWriter.java Source code

Introduction

Here is the source code for com.google.api.tools.framework.importers.swagger.SwaggerFileWriter.java

Source

/*
 * Copyright (C) 2016 Google, 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.google.api.tools.framework.importers.swagger;

import com.google.api.tools.framework.tools.FileWrapper;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableMap;
import com.google.common.io.Files;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.nio.charset.Charset;

/** File write utilities for Swagger to service conversion. */
public class SwaggerFileWriter {
    /** Saves the file contents on the disk and returns the saved file paths. */
    public static Map<String, FileWrapper> saveFilesOnDisk(List<FileWrapper> inputFiles) {

        ImmutableMap.Builder<String, FileWrapper> savedFiles = ImmutableMap.builder();
        File tempDir = Files.createTempDir();
        String tmpDirLocation = tempDir.getAbsolutePath();
        for (FileWrapper inputFile : inputFiles) {
            String filePath = inputFile.getFilename().replaceAll("[\\\\/:]", "_");

            Preconditions.checkState(!Strings.isNullOrEmpty(inputFile.getFileContents().toString()),
                    "swagger spec file contents empty");
            Preconditions.checkState(!Strings.isNullOrEmpty(filePath), "swagger spec file path not provided");

            String filePathToSave = File.separator + tmpDirLocation + File.separator + "swagger_spec_files"
                    + File.separator + filePath;
            FileWrapper fileToSave = FileWrapper.create(filePathToSave, inputFile.getFileContents());
            try {
                saveFileOnDisk(fileToSave);
                savedFiles.put(inputFile.getFilename(), fileToSave);
            } catch (IOException ex) {
                throw new IllegalStateException(
                        String.format("Unable to save the swagger spec contents on the disk at %s", filePathToSave),
                        ex);
            }
        }
        return savedFiles.build();
    }

    /** Saves the individual file on disk with the fileContent. */
    private static void saveFileOnDisk(FileWrapper fileWrapper) throws IOException {
        File file = new File(fileWrapper.getFilename());
        Files.createParentDirs(file);
        Files.write(fileWrapper.getFileContents().toStringUtf8(), file, Charset.defaultCharset());
    }
}