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/**
* Copyright (c) 2008 INRIA.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* INRIA - initial API and implementation
*
* $Id: ParserLauncher.java,v 1.3 2008/06/28 17:12:25 fjouault Exp $
*/
package org.eclipse.gmt.tcs.injector;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.gmt.tcs.injector.TCSRuntime.RefSetting;
import org.eclipse.gmt.tcs.injector.wrappers.ParserWrapper;
/**
*
* @author Mikaël Barbero
* @author Frédéric Jouault
*
*/
public class ParserLauncher {
private final static int DEFAULT_TAB_SIZE = 8;
private List refSettings;
private ParserWrapper parserWrapper;
public Object parse(ModelAdapter target, InputStream in, Map arguments) {
Object ret = null;
refSettings = new ArrayList();
int tabSize = arguments.get("tabSize") == null ? DEFAULT_TAB_SIZE : Integer.parseInt((String)arguments.get("tabSize"));
String parserGeneratorClassName = (String)arguments.get("parserGenerator");
if(parserGeneratorClassName != null) {
try {
parserWrapper = (ParserWrapper)Class.forName("org.eclipse.gmt.tcs.injector.wrappers." + parserGeneratorClassName + ".ParserWrapper", true, Thread.currentThread().getContextClassLoader()).newInstance();
} catch (InstantiationException e) {
throw new IllegalArgumentException("Unable to instanciate parser generator with name " + parserGeneratorClassName, e);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException("Unable to access to parser generator with name " + parserGeneratorClassName, e);
} catch (ClassNotFoundException e) {
throw new IllegalArgumentException("Unable to locate parser generator with name " + parserGeneratorClassName, e);
}
} else {
// default parser generator
parserWrapper = new org.eclipse.gmt.tcs.injector.wrappers.antlr3.ParserWrapper();
}
String nameAndProductionRule = (String)arguments.get("name");
String ss[] = nameAndProductionRule.split("-");
String name = ss[0];
String productionRule = "main";
if(ss.length > 1) {
productionRule = ss[1];
}
TCSRuntime runtime = new TCSRuntime(target, parserWrapper, refSettings, arguments);
parserWrapper.setRuntime(runtime);
try {
ret = parserWrapper.parse(tabSize, name, productionRule, in, arguments);
} catch (Exception e) {
e.printStackTrace();
}
// if(runtime.getNbErrors() == 0) {
// A RefSetting that can autoCreate an element should come before other
// RefSettings that might refer to this element.
Collections.sort(refSettings, new Comparator() {
public int compare(Object o1, Object o2) {
RefSetting rs1 = (RefSetting)o1;
RefSetting rs2 = (RefSetting)o2;
if(rs1.canAutoCreate() && !rs2.canAutoCreate())
return -1; // autoCreate first
else if(rs2.canAutoCreate() && !rs1.canAutoCreate())
return 1; // autoCreate first
else // both or none are autoCreate
return 0; // don't care
}
});
// A RefSetting that relies on imported contexts can only be executed after
// the RefSetting importing the corresponding context (and this, recursively).
// For now, we sort RefSettings so that all those that import a context
// are executed first.
// If a RefSetting that imports a context relies on imported contexts,
// then this solution is not enough.
// The concept of imported context should be defined cleanly first.
Collections.sort(refSettings, new Comparator() {
public int compare(Object o1, Object o2) {
RefSetting rs1 = (RefSetting)o1;
RefSetting rs2 = (RefSetting)o2;
if(rs1.importContext && !rs2.importContext)
return -1; // importContext first
else if(rs2.importContext && !rs1.importContext)
return 1; // importContext first
else // both or none are importContext
return 0; // don't care
}
});
for(Iterator i = refSettings.iterator() ; i.hasNext() ; ) {
RefSetting rs = (RefSetting)i.next();
try {
rs.doIt();
} catch(Exception e) {
System.out.println("Warning: one refSetting crashed:");
e.printStackTrace(System.out);
}
}
// }
return ret;
}
}
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