/*
* 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.
*/
/*
* NRecordToJRecordValuePrimitive.java
* Created: Jan 12, 2007
* By: Bo Ilic
*/
package org.openquark.cal.internal.machine.g.functions;
import java.util.List;
import org.openquark.cal.compiler.FieldName;
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.NValObject;
import org.openquark.cal.internal.machine.g.Node;
import org.openquark.cal.internal.module.Cal.Core.CAL_Prelude_internal;
import org.openquark.cal.internal.module.Cal.Core.CAL_Record_internal;
import org.openquark.cal.internal.runtime.RecordValueImpl;
import org.openquark.cal.module.Cal.Core.CAL_Prelude;
import org.openquark.cal.runtime.CALExecutorException;
import org.openquark.cal.runtime.RecordValue;
/**
* Implementation of Prelude.recordToJListPrimitive :: Outputable r => {r} -> JList;
*/
public final class NRecordToJRecordValuePrimitive extends NPrimitiveFunc {
public static final QualifiedName name = CAL_Record_internal.Functions.recordToJRecordValuePrimitive;
public static final NRecordToJRecordValuePrimitive instance = new NRecordToJRecordValuePrimitive ();
private boolean implementationChecked = false;
private NRecordToJRecordValuePrimitive () {/* Constructor made private for creation control. */}
@Override
protected int getArity () {
return 2;
}
@Override
protected QualifiedName getName () {
return name;
}
/**
* Convert an internal record value into the java representation as a Java map.
*/
@Override
public Node doEvaluation (Node[] arguments, Executor executor)
throws CALExecutorException {
//recordToJRecordValuePrimitive recordDictionary x.
//the compiler ensures that the 2 record arguments all have the same fields.
//must iterate in a deterministic order over the field names (as specified by FieldName.CalSourceFormComparator)
//so that the function is well-defined in the presence of side effects.
//If f is a field, then recordDictionary.f is the dictionary for use when calling the class method Prelude.output on
//the value x.f.
checkImplementation(executor);
// The two arguments in evaluated form will be on top of the stack, in reverse order.
NRecordValue recordDictionary = (NRecordValue) executor.internalEvaluate(arguments[0]);
NRecordValue x = (NRecordValue) executor.internalEvaluate(arguments[1]);
List<String> fieldNames = recordDictionary.fieldNames();
int nFields = fieldNames.size();
RecordValue resultMap = RecordValueImpl.make();
for (int i = 0; i < nFields; ++i) {
String fieldName = fieldNames.get(i);
Node valueDictionaryThunk = recordDictionary.getValue(fieldName);
Node xValueThunk = x.getValue(fieldName);
//compute "Prelude.output valueDictionaryThunk xValueThunk"
//this is just (after inlining Prelude.output d = d"
//valueDictionaryThunk xValueThunk
Object fieldVal = executor.internalEvaluate(valueDictionaryThunk.apply (xValueThunk)).getValue();
resultMap.put(FieldName.make(fieldName), fieldVal);
}
return new NValObject(resultMap);
}
private void checkImplementation (Executor executor) {
if(!implementationChecked) {
if (!isSingleMethodRootClass(executor, CAL_Prelude.TypeClasses.Outputable)) {
throw new IllegalStateException("The implementation of " + CAL_Prelude_internal.Functions.recordFromJMapPrimitive.getQualifiedName() + " assumes that the class " + CAL_Prelude.TypeClasses.Outputable.getQualifiedName() + " has no superclasses and only 1 class method.");
}
implementationChecked = true;
}
}
}