/*******************************************************************************
*
* Copyright (C) 2008 Fujitsu Services Ltd.
*
* Author: Nick Battle
*
* This file is part of VDMJ.
*
* VDMJ is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* VDMJ is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with VDMJ. If not, see <http://www.gnu.org/licenses/>.
*
******************************************************************************/
package org.overture.interpreter.values;
import java.util.FormattableFlags;
import java.util.Formatter;
import java.util.Set;
import org.overture.ast.analysis.AnalysisException;
import org.overture.ast.lex.LexStringToken;
import org.overture.ast.types.ASeq1SeqType;
import org.overture.ast.types.PType;
import org.overture.ast.types.SSeqType;
import org.overture.interpreter.runtime.Context;
import org.overture.interpreter.runtime.ValueException;
public class SeqValue extends Value
{
private static final long serialVersionUID = 1L;
public final ValueList values;
public SeqValue()
{
values = new ValueList();
}
public SeqValue(ValueList values)
{
this.values = values;
}
public SeqValue(String s)
{
this.values = new ValueList();
int len = s.length();
for (int i = 0; i < len; i++)
{
this.values.add(new CharacterValue(s.charAt(i)));
}
}
public SeqValue(LexStringToken string)
{
this(string.value);
}
@Override
public ValueList seqValue(Context ctxt)
{
return values;
}
@Override
public String stringValue(Context ctxt)
{
String s = values.toString();
if (s.charAt(0) == '"')
{
return s.substring(1, s.length() - 1);
}
return s;
}
@Override
public void formatTo(Formatter formatter, int flags, int width,
int precision)
{
String s = values.toString();
if ((flags & FormattableFlags.ALTERNATE) == 0 && s.charAt(0) == '"')
{
s = s.substring(1, s.length() - 1);
}
formatTo(s, formatter, flags, width, precision);
}
@Override
public Value getUpdatable(ValueListenerList listeners)
{
ValueList nseq = new ValueList();
for (Value k : values)
{
Value v = k.getUpdatable(listeners);
nseq.add(v);
}
return UpdatableValue.factory(new SeqValue(nseq), listeners);
}
@Override
public Value getConstant()
{
return new SeqValue(values.getConstant());
}
public Value get(Value arg, Context ctxt) throws ValueException
{
int i = (int) arg.nat1Value(ctxt);
if (i < 1 || i > values.size())
{
abort(4083, "Sequence index out of range: " + arg, ctxt);
}
return values.get(i - 1); // NB 1st = 1. Throws IndexOutOfBounds
}
@Override
public boolean equals(Object other)
{
if (other instanceof Value)
{
Value val = ((Value) other).deref();
if (val instanceof SeqValue)
{
SeqValue ot = (SeqValue) val;
return values.equals(ot.values);
}
}
return false;
}
@Override
public String toString()
{
return values.toString();
}
@Override
public int hashCode()
{
return values.hashCode();
}
@Override
public String kind()
{
return "seq";
}
@Override
protected Value convertValueTo(PType to, Context ctxt, Set<PType> done)
throws AnalysisException
{
// We can't use the isSeq method as it plucks out one sequence
// value from a union. We need to try all union members. So we
// only test for pure SeqTypes.
if (to instanceof SSeqType)
{
if (to instanceof ASeq1SeqType && values.isEmpty())
{
abort(4084, "Cannot convert empty sequence to seq1", ctxt);
}
SSeqType seqto = (SSeqType) to;
ValueList nl = new ValueList();
for (Value v : values)
{
nl.add(v.convertValueTo(seqto.getSeqof(), ctxt));
}
return new SeqValue(nl);
} else
{
return super.convertValueTo(to, ctxt, done);
}
}
@Override
public Object clone()
{
return new SeqValue((ValueList) values.clone());
}
}