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/*
* Copyright (C) 2008 Steve Ratcliffe
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program 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.
*
*
* Author: Steve Ratcliffe
* Create date: 07-Nov-2008
*/
package uk.me.parabola.mkgmap.osmstyle;
import uk.me.parabola.log.Logger;
import uk.me.parabola.mkgmap.osmstyle.eval.Op;
import uk.me.parabola.mkgmap.reader.osm.Element;
import uk.me.parabola.mkgmap.reader.osm.GType;
import uk.me.parabola.mkgmap.reader.osm.Rule;
import uk.me.parabola.mkgmap.reader.osm.TypeResult;
/**
* A rule that contains a condition. If the condition is matched by the
* element then the finalize rule is executed and the held gtype is returned.
*
* @author Steve Ratcliffe
*/
public class ExpressionRule
implements Rule
{
private static final Logger statsLog =
Logger.
getLogger(ExpressionRule.
class.
getPackage().
getName()+
".stats");
private Op expression
;
private final GType gtype
;
private Rule finalizeRule
;
private long numEval
; // count how often the expression was evaluated
private long numTrue
; // count how often the evaluation returned true
/** Finalize rules must not have an element type definition so the add method must never be called. */
private static final TypeResult finalizeTypeResult =
(el, type
) -
> {
throw new UnsupportedOperationException("Finalize rules must not contain an element type definition.");
};
public ExpressionRule
(Op expression, GType gtype
) {
this.
expression = expression
;
this.
gtype = gtype
;
}
public void resolveType
(Element el, TypeResult result
) {
numEval++
;
if (expression.
eval(el
)) {
numTrue++
;
// expression matches
if (finalizeRule
!=
null) {
if (gtype.
isContinueSearch()) {
el = el.
copy();
}
// run the finalize rules
if (gtype.
getDefaultName() !=
null)
el.
addTag("mkgmap:default_name", gtype.
getDefaultName());
finalizeRule.
resolveType(el, finalizeTypeResult
);
}
result.
add(el, gtype
);
}
}
public int resolveType
(int cacheId,
Element el, TypeResult result
) {
numEval++
;
if (expression.
eval(cacheId, el
)){
numTrue++
;
if (finalizeRule
!=
null) {
if (gtype.
isContinueSearch()) {
el = el.
copy();
}
// run the finalize rules
if (gtype.
getDefaultName() !=
null)
el.
addTag("mkgmap:default_name", gtype.
getDefaultName());
cacheId = finalizeRule.
resolveType(cacheId, el, finalizeTypeResult
);
}
result.
add(el, gtype
);
}
return cacheId
;
}
public String toString
() {
return expression.
toString() +
' ' + gtype
;
}
public void setFinalizeRule
(Rule finalizeRule
) {
this.
finalizeRule = finalizeRule
;
}
@
Override
public Rule getFinalizeRule
() {
return finalizeRule
;
}
public Op getOp
(){
return expression
;
}
public void setOp
(Op expression
){
this.
expression = expression
;
}
@
Override
public void printStats
(String header
) {
if (statsLog.
isInfoEnabled())
statsLog.
info(header,
"stats (rule/evals/true)",
this.
toString() +
"/" + numEval +
"/" + numTrue
);
}
@
Override
public boolean containsExpression
(String exp
) {
return expression.
toString().
contains(exp
);
}
@
Override
public void augmentWith
(uk.
me.
parabola.
mkgmap.
reader.
osm.
ElementSaver elementSaver
) {
expression.
augmentWith(elementSaver
);
}
}