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/*******************************************************************************
* Copyright (c) 2003, 2006 IBM Corporation and others.
* 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:
* IBM Corp. - Rational Software - initial implementation
*******************************************************************************/
package org.eclipse.cdt.internal.core.parser.ast.complete;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import org.eclipse.cdt.core.parser.ParserMode;
import org.eclipse.cdt.core.parser.ast.ASTNotImplementedException;
import org.eclipse.cdt.core.parser.ast.IASTExpression;
import org.eclipse.cdt.core.parser.ast.IASTNode;
import org.eclipse.cdt.internal.core.parser.ast.SymbolIterator;
import org.eclipse.cdt.internal.core.parser.pst.IContainerSymbol;
import org.eclipse.cdt.internal.core.parser.pst.IExtensibleSymbol;
import org.eclipse.cdt.internal.core.parser.pst.ISymbol;
import org.eclipse.cdt.internal.core.parser.pst.ISymbolOwner;
import org.eclipse.cdt.internal.core.parser.pst.ParserSymbolTableError;
import org.eclipse.cdt.internal.core.parser.pst.ParserSymbolTableException;
import org.eclipse.cdt.internal.core.parser.pst.TypeFilter;
/**
* @author aniefer
*/
public class ASTNode implements IASTNode {
/* (non-Javadoc)
* @see org.eclipse.cdt.core.parser.ast.IASTNode#lookup(java.lang.String, org.eclipse.cdt.core.parser.ast.IASTNode.LookupKind, org.eclipse.cdt.core.parser.ast.IASTNode)
*/
public ILookupResult lookup(String prefix, LookupKind[] kind, IASTNode context, IASTExpression functionParameters) throws LookupError, ASTNotImplementedException {
if( ! ( this instanceof ISymbolOwner ) ){
return null;
}
IExtensibleSymbol symbol = ((ISymbolOwner)this).getSymbol();
if( symbol == null || !(symbol instanceof IContainerSymbol) ){
throw new LookupError();
}
IContainerSymbol thisContainer = (IContainerSymbol) symbol;
IContainerSymbol qualification = ( context != null ) ? ((ASTNode)context).getLookupQualificationSymbol() : null;
// trying to dereference a context of unknown type
if (context != null && qualification == null)
return null;
List parameters = createLookupParameterList( functionParameters );
int paramIndex = ( parameters != null ) ? parameters.size() : 0;
if( thisContainer.getSymbolTable().getParserMode() != ParserMode.COMPLETION_PARSE ){
throw new ASTNotImplementedException();
}
TypeFilter filter = new TypeFilter();
if( kind != null ){
for( int i = 0; i < kind.length; i++ ){
filter.addAcceptedType( kind[i] );
if( kind[i] == LookupKind.THIS ){
filter.setLookingInThis( true );
if( kind.length == 1 ){
filter.addAcceptedType( LookupKind.ALL );
}
} else {
filter.addAcceptedType( kind[i] );
}
}
} else {
filter.addAcceptedType( LookupKind.ALL );
}
List lookupResults = performPrefixLookup(prefix.toCharArray(), thisContainer, qualification, filter, parameters);
if(lookupResults == null)
return null;
//filter out things that are not visible and things that don't have AST nodes attached
ListIterator iter = lookupResults.listIterator();
while( iter.hasNext() ){
ISymbol s = (ISymbol) iter.next();
if( !thisContainer.isVisible( s, qualification ) ||
s.getASTExtension() == null ||
s.getASTExtension().getPrimaryDeclaration() == null )
{
iter.remove();
continue;
}
if( context != null && ((ASTNode)context).shouldFilterLookupResult( s ) )
iter.remove();
}
SymbolIterator iterator = new SymbolIterator( lookupResults.iterator() );
return new Result( prefix, iterator, lookupResults.size(), paramIndex );
}
/**
* @param prefix
* @param thisContainer
* @param qualification
* @param filter
* @param paramList TODO
* @param lookInThis
* @param lookupResults
* @return
* @throws LookupError
*/
protected List performPrefixLookup(char[] prefix, IContainerSymbol thisContainer, IContainerSymbol qualification, TypeFilter filter, List paramList) throws LookupError {
List results = null;
try {
if( qualification != null ){
results = qualification.prefixLookup( filter, prefix, true, paramList );
} else {
results = thisContainer.prefixLookup( filter, prefix, false, paramList );
}
} catch (ParserSymbolTableException e) {
throw new LookupError();
} catch (ParserSymbolTableError e ){
throw new LookupError();
}
return results;
}
/**
* @param context
* @param qualification
* @return
* @throws LookupError
*/
public IContainerSymbol getLookupQualificationSymbol() throws LookupError {
throw new LookupError();
}
public boolean shouldFilterLookupResult( ISymbol symbol ){
return false;
}
public List createLookupParameterList( IASTExpression parameterExpression ){
if( parameterExpression == null )
return null;
List params = new ArrayList();
ASTExpression exp = (ASTExpression) parameterExpression;
while( exp != null ){
params.add( exp.getResultType().getResult() );
exp = (ASTExpression) exp.getRHSExpression();
}
return params;
}
private class Result implements ILookupResult{
private String prefix;
private Iterator iterator;
private int resultsNumber;
private int parameterIndex;
public Result( String pref, Iterator iter, int resultsSize, int paramIndex ){
prefix = pref;
iterator = iter;
resultsNumber = resultsSize;
parameterIndex = paramIndex;
}
public String getPrefix() { return prefix; }
public Iterator getNodes() { return iterator; }
public int getResultsSize() { return resultsNumber; }
public int getIndexOfNextParameter() { return parameterIndex; }
}
}
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