Class: Kwartz::JstlHandler
- Defined in:
- lib/kwartz/binding/jstl.rb
Overview
directive handler for JSTL
Direct Known Subclasses
Constant Summary collapse
- JSTL_DIRECTIVE_PATTERN =
/\A(\w+)(?:\s*\(\s*(.*)\))?\z/
- JSTL_MAPPING_PATTERN =
/\A'([-:\w]+)',\s*(.*)\z/
- JSTL_DIRECTIVE_FORMAT =
'%s(%s)'
Instance Attribute Summary
Attributes inherited from Handler
#converter, #even, #filename, #odd
Instance Method Summary collapse
- #directive_format ⇒ Object
- #directive_pattern ⇒ Object
- #handle(stmt_list, handler_arg) ⇒ Object
-
#initialize(elem_rulesets = [], properties = {}) ⇒ JstlHandler
constructor
A new instance of JstlHandler.
- #mapping_pattern ⇒ Object
Methods inherited from Handler
#_elem_info_table, #_import_element_info_from_handler, #extract, get_class, #get_element_info, #get_element_ruleset, register_class
Methods included from ElementExpander
#expand_element_info, #expand_statement, #get_element_info, #get_element_ruleset
Methods included from Assertion
Methods included from StatementHelper
#add_foreach_stmts, #add_native_code, #add_native_expr_with_default, #build_print_args, #build_print_expr_stmt, #build_print_stmt, #create_text_print_stmt, #etag_stmt, #stag_stmt, #wrap_content_with_native_stmt, #wrap_element_with_native_stmt
Methods included from ConverterHelper
#_last_stmt_kind, #convert_error, #error_if_empty_tag, #error_when_last_stmt_is_not_if, #include_properties
Constructor Details
#initialize(elem_rulesets = [], properties = {}) ⇒ JstlHandler
Returns a new instance of JstlHandler.
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# File 'lib/kwartz/binding/jstl.rb', line 23 def initialize(elem_rulesets=[], properties={}) super @jstl_ver = properties[:jstl] || Config::PROPERTY_JSTL end |
Instance Method Details
#directive_format ⇒ Object
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# File 'lib/kwartz/binding/jstl.rb', line 45 def directive_format return JSTL_DIRECTIVE_FORMAT end |
#directive_pattern ⇒ Object
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# File 'lib/kwartz/binding/jstl.rb', line 31 def directive_pattern return JSTL_DIRECTIVE_PATTERN end |
#handle(stmt_list, handler_arg) ⇒ Object
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# File 'lib/kwartz/binding/jstl.rb', line 50 def handle(stmt_list, handler_arg) ret = super return ret if ret arg = handler_arg d_name = arg.directive_name d_arg = arg.directive_arg d_str = arg.directive_str case d_name when :for, :For, :FOR, :list, :List, :LIST is_foreach = d_name == :for || d_name == :For || d_name == :FOR error_if_empty_tag(arg) unless is_foreach unless d_arg =~ /\A(\w+)\s*:\s*(.*)\z/ raise convert_error("'#{d_str}': invalid argument.", arg.stag_info.linenum) end loopvar = $1 ; looplist = $2 counter = d_name == :for || d_name == :list ? nil : "#{loopvar}_ctr" toggle = d_name != :FOR && d_name != :LIST ? nil : "#{loopvar}_tgl" status = d_name == :for || d_name == :list ? nil : "#{loopvar}_status" foreach_code = "<c:forEach var=\"#{loopvar}\" items=\"${#{looplist}}\"" foreach_code << " varStatus=\"#{status}\"" if status foreach_code << ">" code = [] code << foreach_code code << "<c:set var=\"#{counter}\" value=\"${#{status}.count}\"/>" if counter if toggle if @jstl_ver < 1.2 code << "<c:choose><c:when test=\"${#{status}.count%2==0}\">" code << "<c:set var=\"#{toggle}\" value=\"${self.even}\"/>" code << "</c:when><c:otherwise>" code << "<c:set var=\"#{toggle}\" value=\"${self.odd}\"/>" code << "</c:otherwise></c:choose>" else code << "<c:set var=\"#{toggle}\" value=\"${#{status}.count%2==0 ? #{self.even} : #{self.odd}}\"/>" end end end_code = "</c:forEach>" if is_foreach wrap_element_with_native_stmt(stmt_list, arg, code, end_code, :set) else wrap_content_with_native_stmt(stmt_list, arg, code, end_code, :set) end when :while, :loop msg = "'#{d_str}': jstl doesn't support '#{d_arg}' directive." raise convert_error(msg, arg.stag_info.linenum) when :set unless d_arg =~ /\A(\S+)\s*=\s*(.*)\z/ raise convert_error("'#{d_str}': invalid argument.", arg.stag_info.linenum) end lhs = $1; rhs = $2 code = "<c:set var=\"#{lhs}\" value=\"${#{rhs}}\"/>" wrap_element_with_native_stmt(stmt_list, arg, code, nil, :set) #code = "<c:set var=\"#{lhs}\" value=\"${#{rhs}}\"/>" #stmt_list << NativeStatement.new(code, :set) #stmt_list << stag_stmt(arg) #stmt_list.concat(cont_stmts) #stmt_list << etag_stmt(arg) when :if start_code = "<c:choose><c:when test=\"${#{d_arg}}\">" end_code = "</c:when></c:choose>" wrap_element_with_native_stmt(stmt_list, arg, start_code, end_code, :if) #stmt_list << NativeStatement.new(start_code, :if) #stmt_list << stag_stmt(arg) #stmt_list.concat(cont_stmts) #stmt_list << etag_stmt(arg) #stmt_list << NativeStatement.new(end, :if) when :elseif, :else error_when_last_stmt_is_not_if(stmt_list, arg) stmt_list.pop # delete '</c:when></c:choose>' if d_name == :else kind = :else start_code = "</c:when><c:otherwise>" end_code = "</c:otherwise></c:choose>" else kind = :elseif start_code = "</c:when><c:when test=\"${#{d_arg}}\">" end_code = "</c:when></c:choose>" end wrap_element_with_native_stmt(stmt_list, arg, start_code, end_code, kind) #stmt_list << NativeStatement.new(start_code, kind) #stmt_list << stag_stmt #stmt_list.concat(cont_stmts) #stmt_list << etag_stmt #stmt_list << NativeStatement.new(end_code, kind) when :default, :Default, :DEFAULT error_if_empty_tag(arg) stmt_list << stag_stmt(arg) flag_escape = d_name == :default ? nil : (d_name == :Default) argstr = arg.cont_stmts[0].args[0] code = "<c:out value=\"${#{d_arg}}\"" code << " escapeXml=\"#{flag_escape}\"" unless flag_escape == nil code << " default=\"#{argstr}\"/>" stmt_list << NativeStatement.new_without_newline(code) stmt_list << etag_stmt(arg) when :catch if d_arg && !d_arg.empty? && d_arg !~ /\A\w+\z/ raise convert_error("'#{d_str}': invalid varname.", arg.stag_info.linenum) end code = "<c:catch" code << " var=\"#{d_arg}\"" if d_arg && !d_arg.empty? code << ">" stmt_list << NativeStatement.new(code) stmt_list.concat(arg.cont_stmts) stmt_list << NativeStatement.new("</c:catch>") when :forEach, :forTokens = eval "{ #{d_arg} }" stag, etag = self.__send__ "handle_jstl_#{d_name}", wrap_element_with_native_stmt(stmt_list, arg, stag, etag, nil) #stmt_list << NativeStatement.new(stag) #stmt_list << stag_stmt #stmt_list.concat(cont_stmts) #stmt_list << etag_stmt #stmt_list << NativeStatement.new(etag) when :redirect, :import, :url, :remove = eval "{ #{d_arg} }" lines = self.__send__ "handle_jstl_#{d_name}", lines.each do |line| stmt_list << NativeStatement.new(line.chomp) end else return false end #case return true end |
#mapping_pattern ⇒ Object
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# File 'lib/kwartz/binding/jstl.rb', line 38 def mapping_pattern return JSTL_MAPPING_PATTERN end |