/*
* Copyright 2011 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.github.sommeri.sourcemap;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonParser;
/**
* Detect and parse the provided source map.
*
* @author johnlenz@google.com (John Lenz)
*/
public class SourceMapConsumerFactory {
/** not constructible */
private SourceMapConsumerFactory() {
}
/**
* @param contents
* The string representing the source map file contents.
* @return The parsed source map.
* @throws SourceMapParseException
*/
public static SourceMapping parse(String contents) throws SourceMapParseException {
return parse(contents, null);
}
/**
* @param contents
* The string representing the source map file contents.
* @param supplier
* A supplier for any referenced maps.
* @return The parsed source map.
* @throws SourceMapParseException
*/
public static SourceMapping parse(String contents, SourceMapSupplier supplier) throws SourceMapParseException {
//SMS: (source map separation): Version 1 support removed because it requires google guava
// if (contents.startsWith("/** Begin line maps. **/")) {
//
// SourceMapConsumerV1 consumer = new SourceMapConsumerV1();
// consumer.parse(contents);
// return consumer;
// } else
if (contents.startsWith("{")) {
try {
// Revision 2 and 3, are JSON Objects
JsonObject sourceMapRoot = new JsonParser().parse(contents).getAsJsonObject();
// Check basic assertions about the format.
int version = sourceMapRoot.get("version").getAsInt();
switch (version) {
case 3: {
SourceMapConsumerV3 consumer = new SourceMapConsumerV3();
consumer.parse(sourceMapRoot, supplier);
return consumer;
}
default:
throw new SourceMapParseException("Unknown source map version:" + version);
}
} catch (JsonParseException ex) {
throw new SourceMapParseException("JSON parse exception: " + ex);
}
}
throw new SourceMapParseException("unable to detect source map format");
}
}