package org.jruby.ir;
import org.jruby.ParseResult;
import org.jruby.Ruby;
import org.jruby.RubyInstanceConfig;
import org.jruby.ast.RootNode;
import org.jruby.ir.persistence.IRWriter;
import org.jruby.ir.persistence.IRWriterFile;
import org.jruby.ir.persistence.util.IRFileExpert;
import java.io.IOException;
/**
* Abstract class that contains general logic for both IR Compiler and IR Interpreter
*
* @param <R> type of returned object by translator
* @param <S> type of specific for translator object
*/
public abstract class IRTranslator<R, S> {
public R execute(Ruby runtime, ParseResult result, S specificObject) {
IRScriptBody scope = null;
if (result instanceof IRScriptBody) { // Already have it (likely from read from persistent store).
scope = (IRScriptBody) result;
} else if (result instanceof RootNode) { // Need to perform create IR from AST
scope = IRBuilder.createIRBuilder(runtime, runtime.getIRManager()).buildRoot((RootNode) result);
scope.setTopLevelBindingScope(((RootNode)result).getScope());
if (RubyInstanceConfig.IR_WRITING) {
try {
IRWriter.persist(new IRWriterFile(IRFileExpert.getIRPersistedFile(scope.getFileName())), scope);
} catch (IOException ex) {
ex.printStackTrace(); // FIXME: Handle errors better
return null;
}
}
}
return execute(runtime, scope, specificObject);
}
protected abstract R execute(Ruby runtime, IRScriptBody producedIrScope, S specificObject);
}