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module Inline require 'java' class Java import javax.tools.ToolProvider import javax.tools.SimpleJavaFileObject compiler = ToolProvider.system_java_compiler file_mgr = compiler.get_standard_file_manager(nil, nil, nil) # because we can't invoke the super constructor on SimpleJavaFileObject # (it's protected...GRR) I generate a little Java file and compile it # on the fly File.open("#{Inline.directory}/SourceString.java", "w") do |file| file.write <<EOF import javax.tools.*; import java.net.URI; public class SourceString extends SimpleJavaFileObject { final String code; public SourceString(String name, String code) { super(URI.create("string:///" + name.replace('.','/') + Kind.SOURCE.extension), Kind.SOURCE); this.code = code; } @Override public CharSequence getCharContent(boolean ignoreEncodingErrors) { return code; } } EOF end # Compile the SourceString.java and load it units = file_mgr.get_java_file_objects_from_strings(["#{Inline.directory}/SourceString.java"]) compiler.get_task(nil, file_mgr, nil, nil, nil, units).call $CLASSPATH << Dir.pwd SourceString = ::Java::SourceString file_mgr.close def initialize(mod) @compiler = ToolProvider.system_java_compiler @file_mgr = @compiler.get_standard_file_manager(nil, nil, nil) @context = mod @src = "" @imports = [] @sigs = [] end def import(cls) @imports << cls end def load_cache false end def java(src) @src << src << "\n" signature = @src.match(/public static\W+(\w+)\W+([a-zA-Z0-9_]+)\((.*)\)/) @sigs << [signature[1], signature[2], signature[3]] end def build @name = "Java#{@src.hash.abs}" imports = "import " + @imports.join(";\nimport ") + ";" if @imports.size > 0 full_src = " #{imports} public class #{@name} { #{@src} } " string_src = SourceString.new(@name, full_src) @compiler.get_task(nil, @file_mgr, nil, nil, nil, [string_src]).call end def load @sigs.each do |sig| @context.module_eval "const_set :#{@name}, ::Java.const_get(:#{@name}); puts '#{sig[1]}'; def #{sig[1]}(*args); #{@name}.#{sig[1]}(*args); end" end end end end