com.google.javascript.jscomp.JSSourceFile Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of closure-compiler Show documentation

Closure Compiler is a JavaScript optimizing compiler. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls. It is used in many of Google's JavaScript apps, including Gmail, Google Web Search, Google Maps, and Google Docs.

There is a newer version: v20240317

Show newest version

/*
 * Copyright 2009 The Closure Compiler 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
 *
 *     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.javascript.jscomp;


import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Charsets;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.nio.charset.Charset;

/**
 * An abstract representation of a JavaScript source file, as input to
 * JSCompiler.
 *
 * @author [email protected] (Nick Santos)
 * @author [email protected] (Andrew Moedinger)
 */
public class JSSourceFile extends SourceFile implements Serializable {
  private static final long serialVersionUID = 1L;

  public static JSSourceFile fromFile(String fileName, Charset charSet) {
    return new JSSourceFile(SourceFile.fromFile(fileName, charSet));
  }

  public static JSSourceFile fromFile(String fileName) {
    return new JSSourceFile(SourceFile.fromFile(fileName, Charsets.UTF_8));
  }

  public static JSSourceFile fromFile(File file, Charset charSet) {
    return new JSSourceFile(SourceFile.fromFile(file, charSet));
  }

  public static JSSourceFile fromFile(File file) {
    return new JSSourceFile(SourceFile.fromFile(file, Charsets.UTF_8));
  }

  public static JSSourceFile fromCode(String fileName, String code) {
    return new JSSourceFile(SourceFile.fromCode(fileName, code));
  }

  public static JSSourceFile fromInputStream(String fileName, InputStream s)
      throws IOException {
    return new JSSourceFile(SourceFile.fromInputStream(fileName, s));
  }

  public static JSSourceFile fromGenerator(String fileName,
      Generator generator) {
    return new JSSourceFile(SourceFile.fromGenerator(fileName, generator));
  }


  private SourceFile referenced;

  private JSSourceFile(SourceFile referenced) {
    super(referenced.getName());
    this.referenced = referenced;
  }

  @Override
  public String getCode() throws IOException {
    return referenced.getCode();
  }

  @Override
  public void clearCachedSource() {
    referenced.clearCachedSource();
  }

  @Override
  @VisibleForTesting
  String getCodeNoCache() {
    return referenced.getCodeNoCache();
  }
}