Class: CodeRay::Scanners::Java

### Home Classes Methods

### In Files

- lib/coderay/scanners/java.rb

### Parent

CodeRay::Scanners::Scanner

### Methods

- #scan_tokens

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# CodeRay::Scanners::Java

Scanner for Java.

### Protected Instance Methods

scan_tokens(encoder, options) click to toggle source

    # File lib/coderay/scanners/java.rb, line 51
    def scan_tokens encoder, options

      state = :initial
      string_delimiter = nil
      package_name_expected = false
      class_name_follows = false
      last_token_dot = false

      until eos?

        case state

        when :initial

          if match = scan(/ \s+ | \\\n /)
            encoder.text_token match, :space
            next

          elsif match = scan(% // [^\n\\]* (?: \\. [^\n\\]* )* | /\* (?: .*? \*/ | .* ) !x)
            encoder.text_token match, :comment
            next

          elsif package_name_expected && match = scan(/ #{IDENT} (?: \. #{IDENT} )* /x)
            encoder.text_token match, package_name_expected

          elsif match = scan(/ #{IDENT} | \[\] /x)
            kind = IDENT_KIND[match]
            if last_token_dot
              kind = :ident
            elsif class_name_follows
              kind = :class
              class_name_follows = false
            else
              case match
              when 'import'
                package_name_expected = :include
              when 'package'
                package_name_expected = :namespace
              when 'class', 'interface'
                class_name_follows = true
              end
            end
            encoder.text_token match, kind

          elsif match = scan(/ \.(?!\d) | [,?:()\[\]}] | -- | \+\+ | && | \|\| | \*\*=? | [-+*\/%^~&|<>=!]=? | <<<?=? | >>>?=? /)
            encoder.text_token match, :operator

          elsif match = scan(/;/)
            package_name_expected = false
            encoder.text_token match, :operator

          elsif match = scan(/\{/)
            class_name_follows = false
            encoder.text_token match, :operator

          elsif check(/[\d.]/)
            if match = scan(/0[xX][0-9A-Fa-f]+/)
              encoder.text_token match, :hex
            elsif match = scan(/(?>0[0-7]+)(?![89.eEfF])/)
              encoder.text_token match, :octal
            elsif match = scan(/\d+[fFdD]|\d*\.\d+(?:[eE][+-]?\d+)?[fFdD]?|\d+[eE][+-]?\d+[fFdD]?/)
              encoder.text_token match, :float
            elsif match = scan(/\d+[lL]?/)
              encoder.text_token match, :integer
            end

          elsif match = scan(/["']/)
            state = :string
            encoder.begin_group state
            string_delimiter = match
            encoder.text_token match, :delimiter

          elsif match = scan(/ @ #{IDENT} /x)
            encoder.text_token match, :annotation

          else
            encoder.text_token getch, :error

          end

        when :string
          if match = scan(STRING_CONTENT_PATTERN[string_delimiter])
            encoder.text_token match, :content
          elsif match = scan(/["'\/]/)
            encoder.text_token match, :delimiter
            encoder.end_group state
            state = :initial
            string_delimiter = nil
          elsif state == :string && (match = scan(/ \\ (?: #{ESCAPE} | #{UNICODE_ESCAPE} ) /ox))
            if string_delimiter == "'" && !(match == "\\\\" || match == "\\'")
              encoder.text_token match, :content
            else
              encoder.text_token match, :char
            end
          elsif match = scan(/\\./)
            encoder.text_token match, :content
          elsif match = scan(/ \\ | $ /)
            encoder.end_group state
            state = :initial
            encoder.text_token match, :error unless match.empty?
          else
            raise_inspect "else case \" reached; %p not handled." % peek(1), encoder
          end

        else
          raise_inspect 'Unknown state', encoder

        end

        last_token_dot = match == '.'

      end

      if state == :string
        encoder.end_group state
      end

      encoder
    end

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