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21 package org.apache.struts.chain.commands;
22
23 import org.apache.commons.chain.Command;
24 import org.apache.struts.chain.contexts.ActionContext;
25 import org.apache.struts.config.ForwardConfig;
26
27 /**
28 * <p>Look up and execute a commons-chain <code>Command</code> based on
29 * properties of the ActionContext's <code>forwardConfig</code> property.
30 * </p>
31 */
32 public class ExecuteForwardCommand extends ExecuteCommand {
33 /**
34 * <p>Return the command specified by the <code>command</code> and
35 * <code>catalog</code> properties of the <code>forwardConfig</code>
36 * property of the given <code>ActionContext</code>. If
37 * <code>forwardConfig</code> is null, return null.</p>
38 *
39 * @param context Our ActionContext
40 * @return Command to execute or null
41 */
42 protected Command getCommand(ActionContext context) {
43 ForwardConfig forwardConfig = context.getForwardConfig();
44
45 if (forwardConfig == null) {
46 return null;
47 }
48
49 return getCommand(forwardConfig.getCommand(), forwardConfig.getCatalog());
50 }
51
52 /**
53 * <p> Determine whether the forwardConfig should be processed. </p>
54 *
55 * @param context The ActionContext we are processing
56 * @return <p><code>true</code> if the given <code>ActionContext</code>
57 * has a non-null <code>forwardConfig</code> property.</p>
58 */
59 protected boolean shouldProcess(ActionContext context) {
60 return (context.getForwardConfig() != null);
61 }
62 }