Extracted configuration resource location into class methods

of this (new) class.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/branches/FOP_0-20-0_Alt-Design@197427 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/java/org/apache/fop/configuration/ConfigurationResource.java b/src/java/org/apache/fop/configuration/ConfigurationResource.java
new file mode 100644 (file)
index 0000000..c58a002
--- /dev/null
+++ b/src/java/org/apache/fop/configuration/ConfigurationResource.java
@@ -0,0 +1,106 @@
+/*
+ *
+ * Copyright 2004 The Apache Software Foundation.
+ *
+ * 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.
+ *
+ * Created on 8/03/2004
+ * $Id$
+ */
+package org.apache.fop.configuration;
+
+import java.io.InputStream;
+import java.net.URL;
+
+import org.apache.fop.apps.FOPException;
+
+/**
+ * @author pbw
+ * @version $Revision$ $Name$
+ */
+public class ConfigurationResource {
+    
+    /**
+     * Convenience class for common functionality required by the config
+     * files.
+     * @param fname the configuration file name.
+     * @param classob the requesting class
+     * @return an <tt>InputStream</tt> generated through a call to
+     * <tt>getResourceAsStream</tt> on the context <tt>ClassLoader</tt>
+     * or the <tt>ClassLoader</tt> for the conf class provided as an argument.
+     */
+    public static InputStream getResourceFile(String fname, Class classob)
+    throws FOPException
+    {
+        InputStream configfile = null;
+        
+        // Try to use Context Class Loader to load the properties file.
+        try {
+            java.lang.reflect.Method getCCL =
+                Thread.class.getMethod("getContextClassLoader", new Class[0]);
+            if (getCCL != null) {
+                ClassLoader contextClassLoader =
+                    (ClassLoader)getCCL.invoke(Thread.currentThread(),
+                            new Object[0]);
+                configfile = contextClassLoader.getResourceAsStream(fname);
+            }
+        } catch (Exception e) {}
+        
+        // the entry /conf/config.xml refers to a directory conf
+        // which is a sibling of org
+        if (configfile == null)
+            configfile = classob.getResourceAsStream(fname);
+        if (configfile == null) {
+            throw new FOPException(
+                    "can't find configuration file " + fname);
+        }
+        return configfile;
+    }
+    
+    /**
+     * Convenience class for common functionality required by the config
+     * files.
+     * @param fname the configuration file name.
+     * @param classob the requesting class
+     * @return a <tt>URL</tt> generated through a call to
+     * <tt>getResource</tt> on the context <tt>ClassLoader</tt>
+     * or the <tt>ClassLoader</tt> for the conf class provided as an argument.
+     */
+    public static URL getResourceUrl(String fname, Class classob)
+    throws FOPException
+    {
+        URL configUrl = null;
+        
+        // Try to use Context Class Loader to load the properties file.
+        try {
+            java.lang.reflect.Method getCCL =
+                Thread.class.getMethod("getContextClassLoader", new Class[0]);
+            if (getCCL != null) {
+                ClassLoader contextClassLoader =
+                    (ClassLoader)getCCL.invoke(Thread.currentThread(),
+                            new Object[0]);
+                configUrl = contextClassLoader.getResource(fname);
+            }
+        } catch (Exception e) {}
+        
+        // the entry /conf/config.xml refers to a directory conf
+        // which is a sibling of org
+        if (configUrl == null)
+            configUrl = classob.getResource(fname);
+        if (configUrl == null) {
+            throw new FOPException(
+                    "can't find configuration file " + fname);
+        }
+        return configUrl;
+    }
+}