Improve decoupling of generated parsers and scanners from frontend code.
Somewhat related to #43 .
I am trying to add CIF as frontend to JPlag, and I thought it would be a good idea to use the existing CIF grammar. Jplag is a stand-alone plain Java program, and parsing a CIF file is just tokenizing the input file, and firing callbacks for recognized production rules, so my first guess was this should be easy.
So I took the grammar, changed the result-types of the rules, and generated the scanner, parser and hooks file. Then I had a look at the import tree, and ended up with (see the bottom of the description).
Some is expected, eg setext.runtime, and ESCET.common.java, but it drags in a lot of FRAMEWORK, EMF code for Position, right upto and including code from eclipse.swt, eclipse.ui, eclipse.core.
This seems silly for an empty scanner and parser that is to be embedded in a plain Java program. Not sure what to do here, I started thinking about introducing an interface class to seperate higher level code from the core code, but not sure.
Ideas? Thoughts?
Should I just start hacking the generated code and make it incompatible with the generator?
[[Dot file with the recursive dependencies, unfold for details.]]
// ESCET = org.eclipse.escet
// FRAMEWORK = org.eclipse.escet.app.framework
digraph C {
"ROOT" -> "de.jplag.cif.CifParserHooks";
"ROOT" -> "de.jplag.cif.CifParser";
"ROOT" -> "de.jplag.cif.CifScanner";
"de.jplag.cif.CifParserHooks" -> "ESCET.setext.runtime.Token";
"de.jplag.cif.CifParserHooks" -> "de.jplag.cif.StructToken.CifToken";
"de.jplag.cif.CifParserHooks" -> "ESCET.setext.runtime.Parser";
"de.jplag.cif.CifParserHooks" -> "ESCET.common.java.Assert";
"de.jplag.cif.CifParserHooks" -> "ESCET.common.java.Lists";
"de.jplag.cif.CifParser" -> "ESCET.setext.runtime.Token";
"de.jplag.cif.CifParser" -> "ESCET.common.java.Strings";
"de.jplag.cif.CifParser" -> "ESCET.setext.runtime.ParserHooksBase";
"de.jplag.cif.CifParser" -> "ESCET.setext.runtime.Parser";
"de.jplag.cif.CifScanner" -> "ESCET.setext.runtime.Scanner";
"de.jplag.cif.CifScanner" -> "ESCET.setext.runtime.Token";
"ESCET.setext.runtime.Token" -> "ESCET.common.java.Strings";
"ESCET.setext.runtime.Token" -> "ESCET.common.position.metamodel.position.Position";
"ESCET.setext.runtime.Scanner" -> "ESCET.common.java.Strings";
"ESCET.setext.runtime.Scanner" -> "ESCET.setext.runtime.exceptions.SyntaxException";
"ESCET.setext.runtime.Scanner" -> "ESCET.common.position.metamodel.position.Position";
"ESCET.setext.runtime.Scanner" -> "ESCET.setext.runtime.exceptions.ScanException";
"ESCET.setext.runtime.Scanner" -> "FRAMEWORK.output.OutputProvider";
"ESCET.setext.runtime.Scanner" -> "ESCET.common.position.metamodel.position.PositionFactory";
"ESCET.setext.runtime.Scanner" -> "ESCET.common.java.Lists";
"ESCET.setext.runtime.exceptions.ScanException" -> "ESCET.common.java.Strings";
"ESCET.setext.runtime.exceptions.ScanException" -> "ESCET.common.position.metamodel.position.Position";
"ESCET.common.position.metamodel.position.PositionFactory" -> "org.eclipse.emf.ecore.EFactory";
"ESCET.common.position.metamodel.position.Position" -> "org.eclipse.emf.ecore.EObject";
"FRAMEWORK.output.OutputProvider" -> "ESCET.common.java.Strings";
"FRAMEWORK.output.OutputProvider" -> "FRAMEWORK.Application";
"FRAMEWORK.output.OutputProvider" -> "FRAMEWORK.AppEnv";
"FRAMEWORK.output.OutputProvider" -> "ESCET.common.java.Assert";
"FRAMEWORK.output.OutputProvider" -> "ESCET.common.java.Lists";
"ESCET.common.java.Strings" -> "org.apache.commons.lang.StringEscapeUtils";
"ESCET.common.java.Strings" -> "ESCET.common.java.Lists";
"ESCET.common.java.Strings" -> "org.apache.commons.lang.StringUtils";
"ESCET.setext.runtime.exceptions.SyntaxException" -> "FRAMEWORK.exceptions.ApplicationException";
"ESCET.setext.runtime.exceptions.SyntaxException" -> "ESCET.common.position.metamodel.position.Position";
"ESCET.setext.runtime.exceptions.SyntaxException" -> "ESCET.common.java.Assert";
"ESCET.common.java.Assert" -> "ESCET.common.java.Strings";
"FRAMEWORK.AppEnv" -> "FRAMEWORK.output.StreamOutputComponent";
"FRAMEWORK.AppEnv" -> "FRAMEWORK.exceptions.DependencyException";
"FRAMEWORK.AppEnv" -> "FRAMEWORK.options.DevModeOption";
"FRAMEWORK.AppEnv" -> "FRAMEWORK.output.OutputModeOption";
"FRAMEWORK.AppEnv" -> "FRAMEWORK.output.OutputProvider";
"FRAMEWORK.AppEnv" -> "ESCET.common.java.Assert";
"FRAMEWORK.AppEnv" -> "FRAMEWORK.output.OutputMode";
"FRAMEWORK.AppEnv" -> "FRAMEWORK.options.Options";
"FRAMEWORK.AppEnv" -> "FRAMEWORK.output.IOutputComponent";
"FRAMEWORK.AppEnv" -> "FRAMEWORK.io.AppStreams";
"FRAMEWORK.Application" -> "FRAMEWORK.management.AppStatus";
"FRAMEWORK.Application" -> "FRAMEWORK.options.OptionDialogOption";
"FRAMEWORK.Application" -> "FRAMEWORK.options.GuiMode";
"FRAMEWORK.Application" -> "FRAMEWORK.options.OptionDialog";
"FRAMEWORK.Application" -> "FRAMEWORK.options.LicenseOption";
"FRAMEWORK.Application" -> "FRAMEWORK.output.IOutputComponent";
"FRAMEWORK.Application" -> "FRAMEWORK.io.AppStream";
"FRAMEWORK.Application" -> "FRAMEWORK.options.OptionValue";
"FRAMEWORK.Application" -> "FRAMEWORK.output.StreamOutputComponent";
"FRAMEWORK.Application" -> "org.eclipse.core.resources.IFile";
"FRAMEWORK.Application" -> "FRAMEWORK.options.DevModeOption";
"FRAMEWORK.Application" -> "FRAMEWORK.options.GuiOption";
"FRAMEWORK.Application" -> "org.eclipse.ui.PlatformUI";
"FRAMEWORK.Application" -> "FRAMEWORK.output.OutputModeOption";
"FRAMEWORK.Application" -> "org.eclipse.core.resources.ResourcesPlugin";
"FRAMEWORK.Application" -> "ESCET.common.java.Pair";
"FRAMEWORK.Application" -> "FRAMEWORK.management.AppManager";
"FRAMEWORK.Application" -> "org.osgi.framework.FrameworkUtil";
"FRAMEWORK.Application" -> "FRAMEWORK.options.OptionCategory";
"FRAMEWORK.Application" -> "org.eclipse.core.resources.IResource";
"FRAMEWORK.Application" -> "FRAMEWORK.exceptions.EndUserException";
"FRAMEWORK.Application" -> "FRAMEWORK.output.OutputProvider";
"FRAMEWORK.Application" -> "FRAMEWORK.options.Options";
"FRAMEWORK.Application" -> "ESCET.common.java.Lists";
"FRAMEWORK.Application" -> "FRAMEWORK.io.AppStreams";
"FRAMEWORK.Application" -> "ESCET.common.java.Strings";
"FRAMEWORK.Application" -> "org.eclipse.core.runtime.Platform";
"FRAMEWORK.Application" -> "org.eclipse.core.runtime.CoreException";
"FRAMEWORK.Application" -> "FRAMEWORK.options.HelpOption";
"FRAMEWORK.Application" -> "FRAMEWORK.options.Option";
"FRAMEWORK.Application" -> "FRAMEWORK.exceptions.ApplicationException";
"FRAMEWORK.Application" -> "org.osgi.framework.Bundle";
"FRAMEWORK.io.AppStream" -> "org.apache.commons.lang.ArrayUtils";
"FRAMEWORK.io.AppStream" -> "ESCET.common.java.Strings";
"FRAMEWORK.io.AppStream" -> "FRAMEWORK.exceptions.InputOutputException";
"FRAMEWORK.options.OptionDialog" -> "FRAMEWORK.AppEnvData";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.widgets.Composite";
"FRAMEWORK.options.OptionDialog" -> "FRAMEWORK.AppEnv";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.events.SelectionEvent";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.events.SelectionAdapter";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.jface.resource.JFaceResources";
"FRAMEWORK.options.OptionDialog" -> "FRAMEWORK.SWTUtils";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.widgets.Display";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.layout.FormLayout";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.widgets.Event";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.layout.FormAttachment";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.widgets.Listener";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.widgets.Shell";
"FRAMEWORK.options.OptionDialog" -> "FRAMEWORK.io.MemAppStream";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.widgets.TreeItem";
"FRAMEWORK.options.OptionDialog" -> "ESCET.common.java.Maps";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.custom.SashForm";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.graphics.Rectangle";
"FRAMEWORK.options.OptionDialog" -> "ESCET.common.java.Sets";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.custom.ScrolledComposite";
"FRAMEWORK.options.OptionDialog" -> "ESCET.common.java.Lists";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.widgets.Text";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.layout.FormData";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.widgets.Tree";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.widgets.Control";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.SWT";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.widgets.Label";
"FRAMEWORK.options.OptionDialog" -> "ESCET.common.java.Assert";
"FRAMEWORK.options.OptionDialog" -> "FRAMEWORK.exceptions.ApplicationException";
"FRAMEWORK.options.OptionDialog" -> "org.eclipse.swt.widgets.Button";
"FRAMEWORK.output.StreamOutputComponent" -> "ESCET.common.java.Strings";
"FRAMEWORK.output.StreamOutputComponent" -> "FRAMEWORK.io.StdAppStream";
"FRAMEWORK.output.StreamOutputComponent" -> "FRAMEWORK.io.AppStream";
"FRAMEWORK.management.AppManager" -> "FRAMEWORK.Application";
"FRAMEWORK.management.AppManager" -> "ESCET.common.java.Lists";
"FRAMEWORK.management.AppManager" -> "ESCET.common.java.Maps";
"FRAMEWORK.options.OptionCategory" -> "ESCET.common.java.Strings";
"FRAMEWORK.options.OptionCategory" -> "FRAMEWORK.AppEnv";
"FRAMEWORK.options.OptionCategory" -> "org.apache.commons.lang.StringUtils";
"FRAMEWORK.options.OptionCategory" -> "ESCET.common.java.Sets";
"FRAMEWORK.options.OptionCategory" -> "ESCET.common.java.Assert";
"FRAMEWORK.options.OptionCategory" -> "ESCET.common.java.Lists";
"FRAMEWORK.options.Options" -> "ESCET.common.java.Strings";
"FRAMEWORK.options.Options" -> "FRAMEWORK.exceptions.InvalidOptionException";
"FRAMEWORK.options.Options" -> "FRAMEWORK.Application";
"FRAMEWORK.options.Options" -> "FRAMEWORK.AppEnv";
"FRAMEWORK.options.Options" -> "ESCET.common.java.Maps";
"FRAMEWORK.options.Options" -> "ESCET.common.java.Assert";
"FRAMEWORK.options.Options" -> "FRAMEWORK.exceptions.ApplicationException";
"FRAMEWORK.options.HelpOption" -> "ESCET.common.java.Strings";
"FRAMEWORK.options.HelpOption" -> "FRAMEWORK.Application";
"FRAMEWORK.options.HelpOption" -> "FRAMEWORK.AppEnv";
"FRAMEWORK.options.HelpOption" -> "ESCET.common.java.Assert";
"FRAMEWORK.options.HelpOption" -> "ESCET.common.java.Lists";
"FRAMEWORK.options.HelpOption" -> "org.apache.commons.io.IOUtils";
"FRAMEWORK.options.HelpOption" -> "FRAMEWORK.io.AppStream";
"FRAMEWORK.options.Option" -> "FRAMEWORK.exceptions.InvalidOptionException";
"FRAMEWORK.options.Option" -> "ESCET.common.java.Strings";
"FRAMEWORK.options.Option" -> "ESCET.common.java.Assert";
"FRAMEWORK.options.Option" -> "FRAMEWORK.exceptions.ApplicationException";
"FRAMEWORK.options.Option" -> "org.eclipse.swt.widgets.Composite";
"FRAMEWORK.management.AppStatus" -> "FRAMEWORK.Application";
"FRAMEWORK.management.AppStatus" -> "FRAMEWORK.AppEnvData";
"FRAMEWORK.options.OptionDialogOption" -> "org.eclipse.swt.widgets.Composite";
"FRAMEWORK.options.LicenseOption" -> "FRAMEWORK.Application";
"FRAMEWORK.options.LicenseOption" -> "FRAMEWORK.AppEnv";
"FRAMEWORK.output.OutputModeOption" -> "FRAMEWORK.options.Options";
"FRAMEWORK.output.OutputModeOption" -> "FRAMEWORK.options.EnumOption";
"ESCET.common.java.Pair" -> "ESCET.common.java.Strings";
"FRAMEWORK.options.EnumOption" -> "FRAMEWORK.exceptions.InvalidOptionException";
"FRAMEWORK.options.EnumOption" -> "org.apache.commons.lang.ArrayUtils";
"FRAMEWORK.options.EnumOption" -> "org.eclipse.swt.widgets.Composite";
"FRAMEWORK.options.EnumOption" -> "org.eclipse.swt.SWT";
"FRAMEWORK.options.EnumOption" -> "org.eclipse.swt.widgets.Button";
"FRAMEWORK.options.EnumOption" -> "ESCET.common.java.Sets";
"FRAMEWORK.options.EnumOption" -> "ESCET.common.java.Assert";
"FRAMEWORK.options.EnumOption" -> "org.eclipse.swt.widgets.Group";
"ESCET.common.java.Sets" -> "ESCET.common.java.Strings";
"ESCET.common.java.Sets" -> "org.apache.commons.lang.StringUtils";
"ESCET.common.java.Sets" -> "ESCET.common.java.Lists";
"FRAMEWORK.exceptions.InvalidOptionException" -> "ESCET.common.java.Assert";
"FRAMEWORK.AppEnvData" -> "ESCET.common.java.Strings";
"FRAMEWORK.AppEnvData" -> "FRAMEWORK.management.AppStatus";
"FRAMEWORK.AppEnvData" -> "FRAMEWORK.exceptions.DependencyException";
"FRAMEWORK.AppEnvData" -> "FRAMEWORK.console.Console";
"FRAMEWORK.AppEnvData" -> "FRAMEWORK.options.GuiMode";
"FRAMEWORK.AppEnvData" -> "FRAMEWORK.output.OutputProvider";
"FRAMEWORK.AppEnvData" -> "FRAMEWORK.options.Options";
"FRAMEWORK.AppEnvData" -> "FRAMEWORK.output.IOutputComponent";
"FRAMEWORK.AppEnvData" -> "FRAMEWORK.management.AppManager";
"FRAMEWORK.AppEnvData" -> "FRAMEWORK.io.AppStreams";
"FRAMEWORK.console.Console" -> "org.eclipse.swt.graphics.Color";
"FRAMEWORK.console.Console" -> "FRAMEWORK.Application";
"FRAMEWORK.console.Console" -> "FRAMEWORK.io.EclipseConsoleAppStream";
"FRAMEWORK.console.Console" -> "org.eclipse.ui.console.IOConsoleInputStream";
"FRAMEWORK.console.Console" -> "org.eclipse.ui.console.ConsolePlugin";
"FRAMEWORK.console.Console" -> "org.eclipse.ui.console.IConsoleManager";
"FRAMEWORK.console.Console" -> "org.eclipse.ui.console.IOConsole";
"FRAMEWORK.console.Console" -> "org.eclipse.ui.console.IOConsoleOutputStream";
"FRAMEWORK.console.Console" -> "org.eclipse.swt.widgets.Display";
"FRAMEWORK.console.Console" -> "org.eclipse.ui.console.IConsole";
"FRAMEWORK.console.Console" -> "FRAMEWORK.io.AppStream";
"FRAMEWORK.console.Console" -> "FRAMEWORK.io.AppStreams";
"FRAMEWORK.io.EclipseConsoleAppStream" -> "ESCET.common.java.Strings";
"FRAMEWORK.io.EclipseConsoleAppStream" -> "FRAMEWORK.exceptions.InputOutputException";
"FRAMEWORK.io.EclipseConsoleAppStream" -> "org.eclipse.ui.console.IOConsoleOutputStream";
"FRAMEWORK.io.StdAppStream" -> "ESCET.common.java.Strings";
"FRAMEWORK.io.StdAppStream" -> "FRAMEWORK.exceptions.InputOutputException";
"FRAMEWORK.SWTUtils" -> "org.eclipse.swt.graphics.Rectangle";
"FRAMEWORK.SWTUtils" -> "org.eclipse.swt.widgets.Shell";
"FRAMEWORK.SWTUtils" -> "org.eclipse.swt.widgets.Display";
"FRAMEWORK.SWTUtils" -> "org.eclipse.swt.SWT";
"FRAMEWORK.SWTUtils" -> "org.eclipse.swt.widgets.Monitor";
"ESCET.setext.runtime.Parser" -> "FRAMEWORK.Paths";
"ESCET.setext.runtime.Parser" -> "ESCET.common.java.Strings";
"ESCET.setext.runtime.Parser" -> "org.apache.commons.lang.StringUtils";
"ESCET.setext.runtime.Parser" -> "ESCET.setext.runtime.exceptions.SyntaxException";
"ESCET.setext.runtime.Parser" -> "FRAMEWORK.exceptions.InputOutputException";
"ESCET.setext.runtime.Parser" -> "ESCET.common.position.metamodel.position.Position";
"ESCET.setext.runtime.Parser" -> "FRAMEWORK.exceptions.InvalidInputException";
"ESCET.setext.runtime.Parser" -> "ESCET.common.java.Pair";
"ESCET.setext.runtime.Parser" -> "FRAMEWORK.output.OutputProvider";
"ESCET.setext.runtime.Parser" -> "ESCET.common.java.Assert";
"ESCET.setext.runtime.Parser" -> "ESCET.common.java.Sets";
"ESCET.setext.runtime.Parser" -> "ESCET.common.java.Lists";
"ESCET.setext.runtime.Parser" -> "ESCET.setext.runtime.exceptions.ParseException";
"FRAMEWORK.Paths" -> "ESCET.common.java.Strings";
"FRAMEWORK.Paths" -> "org.eclipse.emf.ecore.resource.impl.URIHandlerImpl";
"FRAMEWORK.Paths" -> "org.eclipse.emf.ecore.resource.URIHandler";
"FRAMEWORK.Paths" -> "FRAMEWORK.exceptions.InvalidInputException";
"FRAMEWORK.Paths" -> "org.eclipse.emf.common.util.URI";
"FRAMEWORK.Paths" -> "ESCET.common.java.Assert";
"FRAMEWORK.Paths" -> "ESCET.common.java.Lists";
"FRAMEWORK.Paths" -> "org.apache.commons.lang.SystemUtils";
"FRAMEWORK.Paths" -> "org.apache.commons.lang.StringUtils";
"ESCET.setext.runtime.exceptions.ParseException" -> "ESCET.common.java.Strings";
"ESCET.setext.runtime.exceptions.ParseException" -> "ESCET.common.position.metamodel.position.Position";
"ESCET.setext.runtime.exceptions.ParseException" -> "ESCET.common.java.Assert";
}