/*
* 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.
*/
/*
* NShowRecord.java
* Created: Jul 28, 2005
* By: Raymond Cypher
*/
package org.openquark.cal.internal.machine.g.functions;
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.NAp;
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_Debug_internal;
import org.openquark.cal.module.Cal.Core.CAL_Debug;
import org.openquark.cal.runtime.CALExecutorException;
/**
* @author rcypher
*
* TODO To change the template for this generated type comment go to
* Window - Preferences - Java - Code Style - Code Templates
*/
public class NShowRecord extends NPrimitiveFunc {
public static final QualifiedName name = CAL_Debug_internal.Functions.showRecord;
public static final NShowRecord instance = new NShowRecord ();
private boolean showRecordImplementationChecked = false;
private NShowRecord () {/* constructor made private for singleton */ }
@Override
protected int getArity () {
return 2;
}
@Override
protected QualifiedName getName () {
return name;
}
/**
* Convert a record to the corresponding string representation and return the string.
*/
@Override
public Node doEvaluation (Node[] arguments, Executor executor)
throws CALExecutorException {
//showRecord 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 Debug.show on
//the value x.f.
checkShowRecordImplementation (executor);
// Evaluat the two arguments.
NRecordValue recordDictionary = (NRecordValue) executor.internalEvaluate(arguments[0]);
NRecordValue x = (NRecordValue) executor.internalEvaluate(arguments[1]);
List<String> fieldNames = recordDictionary.fieldNames();
int nFields = fieldNames.size();
//tuple records (with 2 or more fields) are displayed using the parentheses notation where field-names are omitted.
boolean isTuple = fieldNames.size() >= 2;
for (int i = 1; isTuple && i <= fieldNames.size(); ++i) {
String fieldName = fieldNames.get(i-1);
if (!fieldName.equals("#"+i)) {
isTuple = false;
}
}
StringBuilder showResult = new StringBuilder();
if (isTuple) {
showResult.append ("(");
for (int i = 0; i < nFields; ++i) {
if (i > 0) {
showResult.append (", ");
}
//compute "Debug.show valueDictionaryThunk xValueThunk"
//this is just (after inlining Debug.show d = d)
//valueDictionaryThunk xValueThunk
String fieldName = fieldNames.get(i);
Node valueDictionaryThunk = recordDictionary.getValue(fieldName);
Node xValueThunk = x.getValue(fieldName);
Node ap = valueDictionaryThunk.apply (xValueThunk);
String apResult = (String)(executor.internalEvaluate(ap).getValue());
showResult.append(apResult);
}
showResult.append(")");
} else {
showResult.append ("{");
for (int i = 0; i < nFields; ++i) {
if (i > 0) {
showResult.append (", ");
}
String fieldName = fieldNames.get(i);
showResult.append(fieldName).append(" = ");
//compute "Debug.show valueDictionaryThunk xValueThunk"
//this is just (after inlining Debug.show d = d)
//valueDictionaryThunk xValueThunk
Node valueDictionaryThunk = recordDictionary.getValue(fieldName);
Node xValueThunk = x.getValue(fieldName);
Node ap = new NAp(valueDictionaryThunk, xValueThunk);
String apResult = (String)(executor.internalEvaluate(ap).getValue());
showResult.append(apResult);
}
showResult.append("}");
}
return (new NValObject(showResult.toString()));
}
private void checkShowRecordImplementation (Executor executor) {
if(!showRecordImplementationChecked) {
if (!isSingleMethodRootClass(executor, CAL_Debug.TypeClasses.Show)) {
throw new IllegalStateException("The implementation of " + CAL_Debug_internal.Functions.showRecord.getQualifiedName() + " assumes that the class " + CAL_Debug.TypeClasses.Show.getQualifiedName() + " has no superclasses and only 1 class method.");
}
showRecordImplementationChecked = true;
}
}
}