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java/org/apache/jasper/runtime/JspFragmentHelper.java

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+/*
+ * 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.jasper.runtime;
+
+import javax.servlet.jsp.JspContext;
+import javax.servlet.jsp.PageContext;
+import javax.servlet.jsp.tagext.JspFragment;
+import javax.servlet.jsp.tagext.JspTag;
+
+/**
+ * Helper class from which all Jsp Fragment helper classes extend.
+ * This class allows for the emulation of numerous fragments within
+ * a single class, which in turn reduces the load on the class loader
+ * since there are potentially many JspFragments in a single page.
+ * <p>
+ * The class also provides various utility methods for JspFragment
+ * implementations.
+ *
+ * @author Mark Roth
+ */
+public abstract class JspFragmentHelper extends JspFragment {
+
+    protected final int discriminator;
+    protected final JspContext jspContext;
+    protected final PageContext _jspx_page_context;
+    protected final JspTag parentTag;
+
+    public JspFragmentHelper( int discriminator, JspContext jspContext,
+        JspTag parentTag )
+    {
+        this.discriminator = discriminator;
+        this.jspContext = jspContext;
+        if(jspContext instanceof PageContext) {
+            _jspx_page_context = (PageContext)jspContext;
+        } else {
+            _jspx_page_context = null;
+        }
+        this.parentTag = parentTag;
+    }
+
+    @Override
+    public JspContext getJspContext() {
+        return this.jspContext;
+    }
+
+    public JspTag getParentTag() {
+        return this.parentTag;
+    }
+
+}