geronimo-jsp_2.1_spec/src/main/java/javax/servlet/jsp/el/ImplicitObjectELResolver.java [307:332]:
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        public Map getHeaderValues() {
            if (this.headerValues == null) {
                this.headerValues = new ScopeMap() {
                    protected Enumeration getAttributeNames() {
                        return ((HttpServletRequest) page.getRequest())
                                .getHeaderNames();
                    }

                    protected Object getAttribute(String name) {
                        Enumeration e = ((HttpServletRequest) page.getRequest())
                                .getHeaders(name);
                        if (e != null) {
                            List list = new ArrayList();
                            while (e.hasMoreElements()) {
                                list.add(e.nextElement().toString());
                            }
                            return (String[]) list.toArray(new String[list
                                    .size()]);
                        }
                        return null;
                    }

                };
            }
            return this.headerValues;
        }
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geronimo-jsp_2.2_spec/src/main/java/javax/servlet/jsp/el/ImplicitObjectELResolver.java [312:337]:
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        public Map getHeaderValues() {
            if (this.headerValues == null) {
                this.headerValues = new ScopeMap() {
                    protected Enumeration getAttributeNames() {
                        return ((HttpServletRequest) page.getRequest())
                                .getHeaderNames();
                    }

                    protected Object getAttribute(String name) {
                        Enumeration e = ((HttpServletRequest) page.getRequest())
                                .getHeaders(name);
                        if (e != null) {
                            List list = new ArrayList();
                            while (e.hasMoreElements()) {
                                list.add(e.nextElement().toString());
                            }
                            return (String[]) list.toArray(new String[list
                                    .size()]);
                        }
                        return null;
                    }

                };
            }
            return this.headerValues;
        }
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