com.google.polymer.PolymerRenamer.java Source code

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Here is the source code for com.google.polymer.PolymerRenamer.java

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/*
 * Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE
 * The complete set of authors may be found at http://polymer.github.io/AUTHORS
 * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS
 */

package com.google.polymer;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

/**
 * The Polymer Property and Databinding Renamer.
 */
public final class PolymerRenamer {

    private PolymerRenamer() {
    }

    private static String getFileContent(String inputFilename) throws FileNotFoundException {
        try (Scanner s = new Scanner(new File(inputFilename))) {
            return s.useDelimiter("\\Z").next();
        }
    }

    private static ImmutableMap<String, String> getRenameMap(String inputFilename) throws FileNotFoundException {
        try (Scanner s = new Scanner(new File(inputFilename))) {
            ImmutableMap.Builder<String, String> renameMapBuilder = ImmutableMap.builder();
            while (s.hasNextLine()) {
                String line = s.nextLine();
                String[] components = line.split(":");
                if (components.length == 2) {
                    renameMapBuilder.put(components[0], components[1]);
                }
            }
            return renameMapBuilder.build();
        }
    }

    /**
     * Invokes the Polymer Property Renamer.
     * @param args Two expected arguments, the first being the Closure property map filename and the
     *        second being the input file.
     */
    public static void main(String[] args) {
        if (args.length < 2 || args.length > 3) {
            printUsage();
            return;
        }

        boolean prettyPrint = false;
        prettyPrint = args[0].equals("--jsPrettyPrint");
        if ((prettyPrint && (args.length != 3)) || (!prettyPrint && (args.length == 3))) {
            printUsage();
            return;
        }

        String propertyMapFilename = args[args.length - 2];
        ImmutableMap<String, String> renameMap;
        try {
            renameMap = getRenameMap(propertyMapFilename);
        } catch (FileNotFoundException e) {
            System.err.println("Unable to read property map file: " + propertyMapFilename);
            return;
        }

        String inputFilename = args[args.length - 1];
        String inputFileContent;
        try {
            inputFileContent = getFileContent(inputFilename);
        } catch (FileNotFoundException e) {
            System.err.println("Unable to read input file: " + inputFilename);
            return;
        }

        if (inputFilename.endsWith("html")) {
            System.out.print(HtmlRenamer.rename(renameMap, inputFileContent));
        } else if (inputFilename.endsWith("js")) {
            try {
                ImmutableSet<JsRenamer.OutputFormat> outputFormat = prettyPrint
                        ? ImmutableSet.<JsRenamer.OutputFormat>of(JsRenamer.OutputFormat.PRETTY)
                        : ImmutableSet.<JsRenamer.OutputFormat>of();
                System.out.print(JsRenamer.rename(renameMap, inputFileContent, outputFormat));
            } catch (JavaScriptParsingException e) {
                System.err.printf("Error encountered parsing %s.%n", inputFilename);
                System.err.println(e);
                System.exit(1);
            }
        }
    }

    private static void printUsage() {
        System.out.println("The Polymer Renamer");
        System.out.println("Args: [--jsPrettyPrint] <Property Map Filename> <Input Filename>");
        System.out.println("  --jsPrettyPrint    For JavaScript files, output in indented form.");
    }
}