[resolves wildfly-extras#563] Add executable to enable/disable the ca…

…mel subsytem

config/src/main/java/org/wildfly/extension/camel/config/ConfigSupport.java

@@ -51,6 +51,7 @@
 import org.jdom.output.Format;
 import org.jdom.output.XMLOutputter;
 import org.wildfly.extension.camel.config.LayerConfig.Type;
+import org.wildfly.extension.camel.config.internal.IllegalStateAssertion;
 
 public class ConfigSupport {
 
@@ -60,6 +61,8 @@ public static ConfigContext createContext(Path jbossHome, Path configuration, Do
 
     public static void applyConfigChange(Path jbossHome, List<String> configs, boolean enable) throws Exception {
 
+        IllegalStateAssertion.assertFalse(configs.isEmpty(), "No configurations specified");
+
         Iterator<ConfigPlugin> itsrv;
         ClassLoader classLoader = ConfigSupport.class.getClassLoader();
 

config/src/main/java/org/wildfly/extension/camel/config/internal/IllegalArgumentAssertion.java

@@ -0,0 +1,61 @@
+/*
+ * #%L
+ * Gravia :: Resource
+ * %%
+ * Copyright (C) 2010 - 2014 JBoss by Red Hat
+ * %%
+ * 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.
+ * #L%
+ */
+package org.wildfly.extension.camel.config.internal;
+
+/**
+ * Legal argument assertions
+ *
+ * @author thomas.diesler@jboss.com
+ * @since 27-Sep-2013
+ */
+public final class IllegalArgumentAssertion {
+
+    // hide ctor
+    private IllegalArgumentAssertion() {
+    }
+
+    /**
+     * Throws an IllegalArgumentException when the given value is null.
+     */
+    public static <T> T assertNotNull(T value, String name) {
+        if (value == null)
+            throw new IllegalArgumentException("Null " + name);
+
+        return value;
+    }
+
+    /**
+     * Throws an IllegalArgumentException when the given value is not true.
+     */
+    public static Boolean assertTrue(Boolean value, String message) {
+        if (!Boolean.valueOf(value))
+            throw new IllegalArgumentException(message);
+        return value;
+    }
+
+    /**
+     * Throws an IllegalArgumentException when the given value is not false.
+     */
+    public static Boolean assertFalse(Boolean value, String message) {
+        if (Boolean.valueOf(value))
+            throw new IllegalArgumentException(message);
+        return value;
+    }
+}

config/src/main/java/org/wildfly/extension/camel/config/internal/IllegalStateAssertion.java

@@ -0,0 +1,92 @@
+/*
+ * #%L
+ * Fabric8 :: SPI
+ * %%
+ * Copyright (C) 2014 Red Hat
+ * %%
+ * 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.
+ * #L%
+ */
+package org.wildfly.extension.camel.config.internal;
+
+/**
+ * Legal state assertions
+ *
+ * @author thomas.diesler@jboss.com
+ * @since 18-Apr-2014
+ */
+public final class IllegalStateAssertion {
+
+    // hide ctor
+    private IllegalStateAssertion() {
+    }
+
+    /**
+     * Throws an IllegalStateException when the given value is not null.
+     * @return the value
+     */
+    public static <T> T assertNull(T value, String message) {
+        if (value != null)
+            throw new IllegalStateException(message);
+        return value;
+    }
+
+    /**
+     * Throws an IllegalStateException when the given value is null.
+     * @return the value
+     */
+    public static <T> T assertNotNull(T value, String message) {
+        if (value == null)
+            throw new IllegalStateException(message);
+        return value;
+    }
+
+    /**
+     * Throws an IllegalStateException when the given value is not true.
+     */
+    public static Boolean assertTrue(Boolean value, String message) {
+        if (!Boolean.valueOf(value))
+            throw new IllegalStateException(message);
+
+        return value;
+    }
+
+    /**
+     * Throws an IllegalStateException when the given value is not false.
+     */
+    public static Boolean assertFalse(Boolean value, String message) {
+        if (Boolean.valueOf(value))
+            throw new IllegalStateException(message);
+        return value;
+    }
+
+    /**
+     * Throws an IllegalStateException when the given values are not equal.
+     */
+    public static <T> T assertEquals(T exp, T was, String message) {
+        assertNotNull(exp, message);
+        assertNotNull(was, message);
+        assertTrue(exp.equals(was), message);
+        return was;
+    }
+
+    /**
+     * Throws an IllegalStateException when the given values are not equal.
+     */
+    public static <T> T assertSame(T exp, T was, String message) {
+        assertNotNull(exp, message);
+        assertNotNull(was, message);
+        assertTrue(exp == was, message);
+        return was;
+    }
+}

config/src/main/java/org/wildfly/extension/camel/config/internal/Options.java

@@ -7,9 +7,9 @@
  * 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.
@@ -26,7 +26,7 @@ final class Options {
     @Option(name = "--help", help = true)
     boolean help;
 
-    @Option(name = "--configs", required = true, usage = "The configurations to enable/disable")
+    @Option(name = "--configs", usage = "The configurations to enable/disable")
     String configs;
 
     @Option(name = "--enable", forbids = { "--disable" }, usage = "Enable the given configurations")