svn commit: r574785 - /activemq/camel/trunk/camel-core/src/main/java/org/apache/camel/builder/ExpressionClause.java

[js...@apache.org]

Author: jstrachan
Date: Tue Sep 11 21:40:16 2007
New Revision: 574785

URL: http://svn.apache.org/viewvc?rev=574785&view=rev
Log:
early spike as an attempt to improve the DSL's completion to only what is available when making expressions

Added:
    activemq/camel/trunk/camel-core/src/main/java/org/apache/camel/builder/ExpressionClause.java   (with props)

Added: activemq/camel/trunk/camel-core/src/main/java/org/apache/camel/builder/ExpressionClause.java
URL: http://svn.apache.org/viewvc/activemq/camel/trunk/camel-core/src/main/java/org/apache/camel/builder/ExpressionClause.java?rev=574785&view=auto
==============================================================================
--- activemq/camel/trunk/camel-core/src/main/java/org/apache/camel/builder/ExpressionClause.java (added)
+++ activemq/camel/trunk/camel-core/src/main/java/org/apache/camel/builder/ExpressionClause.java Tue Sep 11 21:40:16 2007
@@ -0,0 +1,147 @@
+/**
+ *
+ * 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.camel.builder;
+
+import org.apache.camel.CamelContext;
+import org.apache.camel.Expression;
+import org.apache.camel.model.ProcessorType;
+import org.apache.camel.spi.Language;
+
+/**
+ * Represents an expression clause within the DSL
+ *
+ * @version $Revision: 1.1 $
+ */
+public class ExpressionClause<T extends ProcessorType> {
+    private T result;
+    private CamelContext camelContext;
+
+    /**
+     * Evaluates the  <a href="http://activemq.apache.org/camel/el.html">EL Language from JSP and JSF</a>
+     * using the <a href="http://activemq.apache.org/camel/juel.html">JUEL library</a>
+     *
+     * @param text the expression to be evaluated
+     * @return the builder to continue processing the DSL
+     */
+    public T el(String text) {
+        return language("el", text);
+    }
+
+    /**
+     * @param text the expression to be evaluated
+     * @return the builder to continue processing the DSL
+     */
+    public T groovy(String text) {
+        return language("groovy", text);
+    }
+
+    /**
+     * @param text the expression to be evaluated
+     * @return the builder to continue processing the DSL
+     */
+    public T javaScript(String text) {
+        return language("js", text);
+    }
+
+    /**
+     * @param text the expression to be evaluated
+     * @return the builder to continue processing the DSL
+     */
+    public T ognl(String text) {
+        return language("ognl", text);
+    }
+
+    /**
+     * @param text the expression to be evaluated
+     * @return the builder to continue processing the DSL
+     */
+    public T php(String text) {
+        return language("php", text);
+    }
+
+    /**
+     * @param text the expression to be evaluated
+     * @return the builder to continue processing the DSL
+     */
+    public T python(String text) {
+        return language("python", text);
+    }
+
+    /**
+     * @param text the expression to be evaluated
+     * @return the builder to continue processing the DSL
+     */
+    public T ruby(String text) {
+        return language("ruby", text);
+    }
+
+    /**
+     * @param text the expression to be evaluated
+     * @return the builder to continue processing the DSL
+     */
+    public T sql(String text) {
+        return language("sql", text);
+    }
+
+    /**
+     * @param text the expression to be evaluated
+     * @return the builder to continue processing the DSL
+     */
+    public T simple(String text) {
+        return language("simple", text);
+    }
+
+    /**
+     * @param text the expression to be evaluated
+     * @return the builder to continue processing the DSL
+     */
+    public T xpath(String text) {
+        return language("xpath", text);
+    }
+
+    /**
+     * @param text the expression to be evaluated
+     * @return the builder to continue processing the DSL
+     */
+    public T xqery(String text) {
+        return language("xqery", text);
+    }
+
+    /**
+     * Evaluates a given language name with the expression text
+     *
+     * @param languageName the name of the language
+     * @param text         the expression in the given language
+     * @return the builder to continue processing the DSL
+     */
+    public T language(String languageName, String text) {
+        Expression expression = createExpression("el", text);
+
+        // TODO set the exception!
+        return result;
+    }
+
+    protected Expression createExpression(String languageName, String text) {
+        // TODO can we share this code with other places we assert mandatory language names?
+        Language language = camelContext.resolveLanguage(languageName);
+        if (language == null) {
+            throw new IllegalArgumentException("Could not resolve language: " + languageName);
+        }
+        return language.createExpression(text);
+    }
+}

Propchange: activemq/camel/trunk/camel-core/src/main/java/org/apache/camel/builder/ExpressionClause.java
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