1 package org.seasar.cubby.action;
2
3 import java.io.Writer;
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5 import javax.servlet.http.HttpServletRequest;
6 import javax.servlet.http.HttpServletResponse;
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8 import org.seasar.cubby.controller.ActionContext;
9 import org.seasar.framework.util.JSONSerializer;
10 import org.seasar.framework.util.StringUtil;
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42 public class Json extends AbstractActionResult {
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44 private Object bean;
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46 private String calllback;
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54 public Json(final Object bean) {
55 this(bean, null);
56 }
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66 public Json(final Object bean, final String callback) {
67 this.bean = bean;
68 this.calllback = callback;
69 }
70
71 public void execute(final ActionContext context,
72 final HttpServletRequest request, final HttpServletResponse response)
73 throws Exception {
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75 response.setContentType("text/javascript; charset=utf-8");
76 response.setHeader("Cache-Control", "no-cache");
77 response.setHeader("Pragma", "no-cache");
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79 final String script;
80 if (isJsonp()) {
81 script = appendCallbackFunction(JSONSerializer.serialize(bean),
82 calllback);
83 } else {
84 script = JSONSerializer.serialize(bean);
85 }
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87 final Writer writer = response.getWriter();
88 writer.write(script);
89 writer.flush();
90 }
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92 private boolean isJsonp() {
93 return !StringUtil.isEmpty(calllback);
94 }
95
96 private static String appendCallbackFunction(final String script,
97 final String callback) {
98 final StringBuilder builder = new StringBuilder(script.length()
99 + callback.length() + 10);
100 builder.append(callback);
101 builder.append("(");
102 builder.append(script);
103 builder.append(");");
104 return builder.toString();
105 }
106
107 }