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1
4 package com.opensymphony.webwork.portlet.velocity;
5
6 import org.apache.log4j.Category;
7 import org.apache.velocity.context.InternalContextAdapter;
8 import org.apache.velocity.exception.MethodInvocationException;
9 import org.apache.velocity.exception.ParseErrorException;
10 import org.apache.velocity.exception.ResourceNotFoundException;
11 import org.apache.velocity.runtime.RuntimeServices;
12 import org.apache.velocity.runtime.directive.Directive;
13 import org.apache.velocity.runtime.parser.node.Node;
14
15 import java.io.IOException  ;
16 import java.io.Writer ;
17
18
22 public final class ParamDirective extends Directive {
23
24 private static Category log;
25
26 static {
27 log = Category.getInstance(com.opensymphony.webwork.portlet.velocity.ParamDirective.class);
28 }
29
30 public ParamDirective() {
31 }
32
33 public String getName() {
34 return "decoratorParam";
35 }
36
37 public int getType() {
38 return 2;
39 }
40
41 public void init(RuntimeServices services, InternalContextAdapter adapter, Node node) throws Exception {
42 super.init(services, adapter, node);
43 int numArgs = node.jjtGetNumChildren();
44 if (numArgs != 2)
45 services.error("#decoratorParam error: You must specify a param name and value.");
46 }
47
48 public boolean render(InternalContextAdapter adapter, Writer writer, Node node) throws IOException , ResourceNotFoundException,
49 ParseErrorException, MethodInvocationException {
50 ApplyDecoratorDirective.DirectiveStack stack = (ApplyDecoratorDirective.DirectiveStack) adapter
51 .get(ApplyDecoratorDirective.STACK_KEY);
52 if (stack == null)
53 throw new ParseErrorException("#decoratorParam error: You must nest this directive within a #applyDecorator directive");
54 ApplyDecoratorDirective parent = stack.peek();
55 if (parent == null) {
56 log.error("#decoratorParam error: You must nest this directive within a #applyDecorator directive");
57 return false;
58 } else {
59 String paramName = (String ) node.jjtGetChild(0).value(adapter);
60 Object paramValue = node.jjtGetChild(1).value(adapter);
61 parent.addParameter(paramName, paramValue);
62 return true;
63 }
64 }
65
66 } |
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