/*
* Copyright (c) 2007 BUSINESS OBJECTS SOFTWARE LIMITED
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of Business Objects nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.openquark.cal.internal.machine.g.functions;
import java.util.ArrayList;
import java.util.List;
import org.openquark.cal.compiler.QualifiedName;
import org.openquark.cal.internal.machine.g.Executor;
import org.openquark.cal.internal.machine.g.NPrimitiveFunc;
import org.openquark.cal.internal.machine.g.NRecordValue;
import org.openquark.cal.internal.machine.g.NValInt;
import org.openquark.cal.internal.machine.g.NValObject;
import org.openquark.cal.internal.machine.g.Node;
import org.openquark.cal.internal.module.Cal.Core.CAL_Record_internal;
import org.openquark.cal.runtime.CALExecutorException;
/**
* Implements the built-in primitive function for converting a Record to a List.
* for the G machine.
*
* @author Magnus Byne
*/
public class NBuildList extends NPrimitiveFunc {
public static final QualifiedName name = CAL_Record_internal.Functions.buildListPrimitive;
public static final NBuildList instance = new NBuildList ();
private NBuildList () {/* Constructor made private to control creation. */ }
@Override
protected int getArity () {
return 3;
}
@Override
protected QualifiedName getName () {
return name;
}
@Override
public Node doEvaluation (Node[] arguments, Executor executor)
throws CALExecutorException {
// Evaluate the 3 arguments.
NRecordValue recordDict = (NRecordValue) executor.internalEvaluate(arguments[0]);
NValInt index = (NValInt) executor.internalEvaluate(arguments[1]);
NRecordValue recordValue = (NRecordValue) executor.internalEvaluate(arguments[2]);
int nFields = recordDict.getNFields();
List<Node> result = new ArrayList<Node>(nFields);
int nParams = recordValue.getNFields();
ArrayList<RecordParamHelper> paramSources = new ArrayList<RecordParamHelper>(nParams);
for(int i=0; i<nParams; i++) {
paramSources.add(RecordParamHelper.create(recordValue.getNthValue(i), executor));
}
for (int i = 0; i < nFields; ++i) {
Node fieldDict = recordDict.getNthValue(i);
Node elem;
if (index.getIntValue() == -1)
elem = fieldDict;
else
elem = fieldDict.apply(index);
//fill f's arguments using the param sources.
for(RecordParamHelper param : paramSources) {
elem = elem.apply(param.getNext(executor));
}
result.add(elem);
}
return new NValObject(result);
}
}