Author: markt
Date: Tue Sep 29 12:42:27 2015
New Revision: 1705848

URL: http://svn.apache.org/viewvc?rev=1705848&view=rev
Log:
Preparatory work for fixing https://bz.apache.org/bugzilla/show_bug.cgi?id=56777
Add a utility class that will provide an input stream using a provided 
'location' string. The location can be a URL, an absolute file path or a 
relative file path.

Added:
    tomcat/trunk/java/org/apache/tomcat/util/file/ConfigFileLoader.java   (with 
props)
    tomcat/trunk/test/org/apache/tomcat/util/file/TestConfigFileLoader.java   
(with props)

Added: tomcat/trunk/java/org/apache/tomcat/util/file/ConfigFileLoader.java
URL: 
http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/tomcat/util/file/ConfigFileLoader.java?rev=1705848&view=auto
==============================================================================
--- tomcat/trunk/java/org/apache/tomcat/util/file/ConfigFileLoader.java (added)
+++ tomcat/trunk/java/org/apache/tomcat/util/file/ConfigFileLoader.java Tue Sep 
29 12:42:27 2015
@@ -0,0 +1,68 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You 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 org.apache.tomcat.util.file;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.net.URL;
+
+/**
+ * This class is used to obtain {@link InputStream}s for configuration files
+ * from a given location String. This allows greater flexibility than these
+ * files having to be loaded directly from a file system.
+ */
+public class ConfigFileLoader {
+
+    private static final URI CATALINA_BASE_URI;
+
+    static {
+        File catalinaBase = new File("");
+        CATALINA_BASE_URI = catalinaBase.toURI();
+    }
+
+    private ConfigFileLoader() {
+        // Utility class. Hide the default constructor.
+    }
+
+
+    /**
+     * Load the resource from the specified location.
+     *
+     * @param location The location for the resource of interest. The location
+     *                 may be a URL or a file path. Relative paths will be
+     *                 resolved against CATALINA_BASE.
+     *
+     * @return The InputStream for the given resource. The caller is 
responsible
+     *         for closing this stream when it is no longer used.
+     *
+     * @throws IOException If an InputStream cannot be created using the
+     *                     provided location
+     */
+    public static InputStream getInputStream(String location) throws 
IOException {
+
+        // Absolute URIs will be left alone
+        // Relative files will be resolved relative to catalina base
+        // Absolute files will be converted to URIs
+        URI uri = CATALINA_BASE_URI.resolve(location);
+        URL url = uri.toURL();
+
+        return url.openConnection().getInputStream();
+    }
+}

Propchange: tomcat/trunk/java/org/apache/tomcat/util/file/ConfigFileLoader.java
------------------------------------------------------------------------------
    svn:eol-style = native

Added: tomcat/trunk/test/org/apache/tomcat/util/file/TestConfigFileLoader.java
URL: 
http://svn.apache.org/viewvc/tomcat/trunk/test/org/apache/tomcat/util/file/TestConfigFileLoader.java?rev=1705848&view=auto
==============================================================================
--- tomcat/trunk/test/org/apache/tomcat/util/file/TestConfigFileLoader.java 
(added)
+++ tomcat/trunk/test/org/apache/tomcat/util/file/TestConfigFileLoader.java Tue 
Sep 29 12:42:27 2015
@@ -0,0 +1,64 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You 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 org.apache.tomcat.util.file;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import org.apache.catalina.startup.TomcatBaseTest;
+import org.apache.catalina.webresources.TomcatURLStreamHandlerFactory;
+
+public class TestConfigFileLoader {
+
+    @BeforeClass
+    public static void setup() {
+        TomcatURLStreamHandlerFactory.getInstance();
+        
System.setProperty("catalina.base",TomcatBaseTest.getBuildDirectory().getAbsolutePath());
+    }
+
+    @Test
+    public void test01() throws IOException {
+        doTest("classpath:org/apache/catalina/mbeans-descriptors.xml");
+    }
+
+    @Test(expected=FileNotFoundException.class)
+    public void test02() throws IOException {
+        doTest("classpath:org/apache/catalina/foo");
+    }
+
+    @Test
+    public void test03() throws IOException {
+        doTest("test/webresources/dir1");
+    }
+
+    @Test(expected=FileNotFoundException.class)
+    public void test04() throws IOException {
+        doTest("test/webresources/unknown");
+    }
+
+    private void doTest(String path) throws IOException {
+        try (InputStream is = ConfigFileLoader.getInputStream(path)) {
+            Assert.assertNotNull(is);
+        }
+    }
+}

Propchange: 
tomcat/trunk/test/org/apache/tomcat/util/file/TestConfigFileLoader.java
------------------------------------------------------------------------------
    svn:eol-style = native



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