io.swagger.codegen.v3.AbstractGenerator Maven / Gradle / Ivy

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package io.swagger.codegen.v3;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.io.Writer;
import java.util.Scanner;
import java.util.regex.Pattern;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public abstract class AbstractGenerator {
    private static final Logger LOGGER = LoggerFactory.getLogger(AbstractGenerator.class);

    @SuppressWarnings("static-method")
    public File writeToFile(String filename, String contents) throws IOException {
        LOGGER.info("writing file " + filename);
        File output = new File(filename);

        if (output.getParent() != null && !new File(output.getParent()).exists()) {
            File parent = new File(output.getParent());
            parent.mkdirs();
        }
        Writer out = new BufferedWriter(new OutputStreamWriter(
                new FileOutputStream(output), "UTF-8"));

        out.write(contents);
        out.close();
        return output;
    }

    public String readTemplate(String name) {
        try {
            Reader reader = getTemplateReader(name);
            if (reader == null) {
                throw new RuntimeException("no file found");
            }
            Scanner s = new Scanner(reader).useDelimiter("\\A");
            return s.hasNext() ? s.next() : "";
        } catch (Exception e) {
            LOGGER.error(e.getMessage());
        }
        throw new RuntimeException("can't load template " + name);
    }

    public Reader getTemplateReader(String name) {
        try {
            InputStream is = this.getClass().getClassLoader().getResourceAsStream(getCPResourcePath(name));
            if (is == null) {
                is = new FileInputStream(new File(name)); // May throw but never return a null value
            }
            return new InputStreamReader(is, "UTF-8");
        } catch (Exception e) {
            LOGGER.error(e.getMessage());
        }
        throw new RuntimeException("can't load template " + name);
    }

    private String buildLibraryFilePath(String dir, String library, String file) {
        return dir + File.separator + "libraries" + File.separator + library + File.separator + file;
    }

    /**
     * Get the template file path with template dir prepended, and use the
     * library template if exists.
     *
     * @param config Codegen config
     * @param templateFile Template file
     * @return String Full template file path
     */
    public String getFullTemplateFile(CodegenConfig config, String templateFile) {
        //1st the code will check if there's a