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Merge pull request #130 from rvesse/2.10
Prepare for 3.0.0 release
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67
airline-core/src/main/java/com/github/rvesse/airline/parser/resources/ModulePathLocator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| /** | ||
| * Copyright (C) 2010-16 the original author or 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.rvesse.airline.parser.resources; | ||
|
|
||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
|
|
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| public class ModulePathLocator implements ResourceLocator { | ||
| @Override | ||
| public InputStream open(String searchLocation, String filename) throws IOException { | ||
| if (searchLocation == null) { | ||
| return null; | ||
| } | ||
|
|
||
| // Strip off Classpath URI prefix if present | ||
| if (searchLocation.startsWith(ClasspathLocator.CLASSPATH_URI_PREFIX)) { | ||
| searchLocation = searchLocation.substring(ClasspathLocator.CLASSPATH_URI_PREFIX.length()); | ||
| } | ||
|
|
||
| // Strip off leading / if present | ||
| // This is because when running on the Module Path the JVM translates the package name of the resource | ||
| // to its associated module by simply replacing / characters with . characters. Thus, if we have a leading | ||
| // slash we end up with an invalid module name like .foo.bar instead of foo.bar as was intended. And as a | ||
| // result we never correctly locate resources when running on the Module Path if we didn't do this. | ||
| if (searchLocation.startsWith("/")) { | ||
| searchLocation = searchLocation.length() > 1 ? searchLocation.substring(1) : ""; | ||
| } | ||
|
|
||
| // Build the expected resource name | ||
| StringBuilder resourceName = new StringBuilder(); | ||
| resourceName.append(searchLocation); | ||
| if (!searchLocation.endsWith("/") && searchLocation.length() > 0) { | ||
| resourceName.append("/"); | ||
| } | ||
| resourceName.append(filename); | ||
|
|
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| // Try to open the classpath resource | ||
| InputStream resourceStream = ClassLoader.getSystemResourceAsStream(resourceName.toString()); | ||
| if (resourceStream != null) { | ||
| return resourceStream; | ||
| } | ||
|
|
||
| // If the search location is not a package then return that directly if | ||
| // it is a valid location | ||
| if (!searchLocation.endsWith("/")) { | ||
| InputStream locStream = ClassLoader.getSystemResourceAsStream(searchLocation); | ||
| if (locStream != null) { | ||
| return locStream; | ||
| } | ||
| } | ||
|
|
||
| return null; | ||
| } | ||
| } |
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