GUACAMOLE-641: Provide DelegatingEnvironment convenience class.

guacamole-ext/src/main/java/org/apache/guacamole/environment/DelegatingEnvironment.java

@@ -0,0 +1,92 @@
+/*
+ * 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.guacamole.environment;
+
+import java.io.File;
+import java.util.Map;
+import org.apache.guacamole.GuacamoleException;
+import org.apache.guacamole.net.auth.GuacamoleProxyConfiguration;
+import org.apache.guacamole.properties.GuacamoleProperties;
+import org.apache.guacamole.properties.GuacamoleProperty;
+import org.apache.guacamole.protocols.ProtocolInfo;
+
+/**
+ * Environment implementation which simply delegates all function calls to a
+ * wrapped Environment instance.
+ */
+public class DelegatingEnvironment implements Environment {
+
+    /**
+     * The Environment instance that all function calls should be delegated to.
+     */
+    private final Environment environment;
+
+    /**
+     * Creates a new DelegatingEnvironment which delegates all function calls
+     * to the given Environment.
+     *
+     * @param environment
+     *     The Environment that all function calls should be delegated to.
+     */
+    public DelegatingEnvironment(Environment environment) {
+        this.environment = environment;
+    }
+
+    @Override
+    public File getGuacamoleHome() {
+        return environment.getGuacamoleHome();
+    }
+
+    @Override
+    public Map<String, ProtocolInfo> getProtocols() {
+        return environment.getProtocols();
+    }
+
+    @Override
+    public ProtocolInfo getProtocol(String name) {
+        return environment.getProtocol(name);
+    }
+
+    @Override
+    public <Type> Type getProperty(GuacamoleProperty<Type> property) throws GuacamoleException {
+        return environment.getProperty(property);
+    }
+
+    @Override
+    public <Type> Type getProperty(GuacamoleProperty<Type> property, Type defaultValue) throws GuacamoleException {
+        return environment.getProperty(property, defaultValue);
+    }
+
+    @Override
+    public <Type> Type getRequiredProperty(GuacamoleProperty<Type> property) throws GuacamoleException {
+        return environment.getRequiredProperty(property);
+    }
+
+    @Override
+    public GuacamoleProxyConfiguration getDefaultGuacamoleProxyConfiguration() throws GuacamoleException {
+        return environment.getDefaultGuacamoleProxyConfiguration();
+    }
+
+    @Override
+    public void addGuacamoleProperties(GuacamoleProperties properties) throws GuacamoleException {
+        environment.addGuacamoleProperties(properties);
+    }
+
+}