/*
* 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
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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/*
* RTRecordToJListPrimitive.java
* Created: Jun 25, 2004
* By: Bo Ilic
*/
package org.openquark.cal.internal.runtime.lecc.functions;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.openquark.cal.internal.runtime.lecc.LECCMachineConfiguration;
import org.openquark.cal.internal.runtime.lecc.RTData;
import org.openquark.cal.internal.runtime.lecc.RTExecutionContext;
import org.openquark.cal.internal.runtime.lecc.RTRecordValue;
import org.openquark.cal.internal.runtime.lecc.RTResultFunction;
import org.openquark.cal.internal.runtime.lecc.RTSupercombinator;
import org.openquark.cal.internal.runtime.lecc.RTValue;
import org.openquark.cal.runtime.CALExecutorException;
import org.openquark.cal.util.FixedSizeList;
/**
* Implements the built-in primitive function:
* recordToJListPrimitive :: Outputable r => {r} -> JList
*
* @author Bo Ilic
*/
public final class RTRecordToJListPrimitive extends RTSupercombinator {
public static final RTRecordToJListPrimitive $instance = new RTRecordToJListPrimitive();
private RTRecordToJListPrimitive() {
// Declared private to limit instantiation.
}
public static final RTRecordToJListPrimitive make(RTExecutionContext $ec) {
return $instance;
}
@Override
public final int getArity() {
return 2;
}
@Override
public final RTValue f(final RTResultFunction rootNode, final RTExecutionContext $ec) throws CALExecutorException {
// Arguments
RTValue x = rootNode.getArgValue();
RTValue recordDictionary = rootNode.prevArg().getArgValue();
// Release the fields in the root node to open them to garbage collection
rootNode.clearMembers();
return f2S (
RTValue.lastRef(recordDictionary.evaluate($ec), recordDictionary = null),
RTValue.lastRef(x.evaluate($ec), x = null),
$ec);
}
@Override
public final RTValue f2L(RTValue recordDictionary, RTValue x, RTExecutionContext $ec) throws CALExecutorException {
return f2S (
RTValue.lastRef(recordDictionary.evaluate($ec), recordDictionary = null),
RTValue.lastRef(x.evaluate($ec), x = null),
$ec);
}
@Override
public final RTValue f2S(RTValue recordDictionary, RTValue x, RTExecutionContext $ec) throws CALExecutorException {
// Since all branches of the function code return a HNF we can simply box the result of the unboxed return method.
return RTData.CAL_Opaque.make(fUnboxed2S (recordDictionary, x, $ec));
}
/**
* This is the version of the function logic that directly returns an unboxed value.
* All functions whose return types can be unboxed should have a version of the function
* logic which returns an unboxed value.
* @param recordDictionary
* @param x
* @param $ec
* @return List
* @throws CALExecutorException
*/
public final List<Object> fUnboxed2S(RTValue recordDictionary, RTValue x, RTExecutionContext $ec) throws CALExecutorException {
$ec.incrementNMethodCalls();
if (LECCMachineConfiguration.generateDebugCode() && $ec.isDebugProcessingNeeded(getQualifiedName())) {
$ec.debugProcessing(getQualifiedName(), new RTValue[]{recordDictionary, x});
}
//recordToJListPrimitive 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.
RTRecordValue recordDict = (RTRecordValue)recordDictionary;
RTRecordValue xRecord = (RTRecordValue)x;
int nFields = recordDict.getNFields();
List<Object> resultList;
//most records have few fields. In these case, we use a more efficient data structure than ArrayList.
switch (nFields) {
case 0:
{
resultList = Collections.emptyList();
break;
}
case 1:
{
resultList = FixedSizeList.make(
outputField(0, recordDict, xRecord, $ec));
break;
}
case 2:
{
resultList = FixedSizeList.make(
outputField(0, recordDict, xRecord, $ec),
outputField(1, recordDict, xRecord, $ec));
break;
}
case 3:
{
resultList = FixedSizeList.make(
outputField(0, recordDict, xRecord, $ec),
outputField(1, recordDict, xRecord, $ec),
outputField(2, recordDict, xRecord, $ec));
break;
}
case 4:
{
resultList = FixedSizeList.make(
outputField(0, recordDict, xRecord, $ec),
outputField(1, recordDict, xRecord, $ec),
outputField(2, recordDict, xRecord, $ec),
outputField(3, recordDict, xRecord, $ec));
break;
}
case 5:
{
resultList = FixedSizeList.make(
outputField(0, recordDict, xRecord, $ec),
outputField(1, recordDict, xRecord, $ec),
outputField(2, recordDict, xRecord, $ec),
outputField(3, recordDict, xRecord, $ec),
outputField(4, recordDict, xRecord, $ec));
break;
}
case 6:
{
resultList = FixedSizeList.make(
outputField(0, recordDict, xRecord, $ec),
outputField(1, recordDict, xRecord, $ec),
outputField(2, recordDict, xRecord, $ec),
outputField(3, recordDict, xRecord, $ec),
outputField(4, recordDict, xRecord, $ec),
outputField(5, recordDict, xRecord, $ec));
break;
}
case 7:
{
resultList = FixedSizeList.make(
outputField(0, recordDict, xRecord, $ec),
outputField(1, recordDict, xRecord, $ec),
outputField(2, recordDict, xRecord, $ec),
outputField(3, recordDict, xRecord, $ec),
outputField(4, recordDict, xRecord, $ec),
outputField(5, recordDict, xRecord, $ec),
outputField(6, recordDict, xRecord, $ec));
break;
}
default:
{
resultList = new ArrayList<Object>(nFields);
for (int i = 0; i < nFields; ++i) {
resultList.add(outputField(i, recordDict, xRecord, $ec));
}
break;
}
}
return resultList;
}
private static final Object outputField(int fieldN, RTRecordValue recordDictionary, RTRecordValue xRecord, RTExecutionContext $ec) throws CALExecutorException {
//RTValue fieldDict = recordDictionary.getNthValue(i);
//RTValue xField = xRecord.getNthValue(i);
//compute "Prelude.output fieldDict xField"
//this is just (after inlining Prelude.output d = d"
//fieldDict xField
return recordDictionary.getNthValue(fieldN).apply(xRecord.getNthValue(fieldN)).evaluate($ec).getOpaqueValue();
}
/**
* {@inheritDoc}
*/
@Override
public final String getModuleName () {
//JUnit tested to equal its binding file value in RuntimeStringConstantsTest.
return "Cal.Core.Prelude";
}
/**
* {@inheritDoc}
*/
@Override
public final String getUnqualifiedName () {
//JUnit tested to equal its binding file value in RuntimeStringConstantsTest.
return "recordToJListPrimitive";
}
/**
* {@inheritDoc}
*/
@Override
public final String getQualifiedName() {
//JUnit tested to equal its binding file value in RuntimeStringConstantsTest.
return "Cal.Core.Prelude.recordToJListPrimitive";
}
}