/*
* Copyright 2014 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.debugging.sourcemap.SourceMapConsumerV3;
import com.google.debugging.sourcemap.SourceMapParseException;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A lazy-loaded SourceMapConsumerV3 instance.
*/
public class SourceMapInput {
private static final Logger logger =
Logger.getLogger(SourceMapInput.class.getName());
private SourceFile sourceFile;
private SourceMapConsumerV3 parsedSourceMap = null;
public SourceMapInput(SourceFile sourceFile) {
this.sourceFile = sourceFile;
}
/**
* Gets the source map, reading from disk and parsing if necessary.
*/
public SourceMapConsumerV3 getSourceMap() {
if (parsedSourceMap == null) {
synchronized (this) {
if (parsedSourceMap == null) {
parsedSourceMap = new SourceMapConsumerV3();
try {
parsedSourceMap.parse(sourceFile.getCode());
} catch (IOException | SourceMapParseException parseFailure) {
logger.log(
Level.WARNING, "Failed to parse sourcemap", parseFailure);
}
}
}
}
return parsedSourceMap;
}
/**
* Gets the original location of this sourcemap file on disk.
*/
public String getOriginalPath() {
return sourceFile.getOriginalPath();
}
}