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or-syntax for lookup matches

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Arndt Brenschede 2015-02-23 20:47:55 +01:00
parent e0dbb0eb66
commit 1aa62b0b71
2 changed files with 24 additions and 8 deletions
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21
brouter-expressions/src/main/java/btools/expressions/BExpression.java
View file

@ -1,5 +1,6 @@
package btools.expressions;
import java.util.StringTokenizer;
final class BExpression
{
@ -26,7 +27,7 @@ final class BExpression
private float numberValue;
private int variableIdx;
private int lookupNameIdx;
private int lookupValueIdx;
private int[] lookupValueIdxArray;
// Parse the expression and all subexpression
public static BExpression parse( BExpressionContext ctx, int level ) throws Exception
@ -105,17 +106,25 @@ final class BExpression
{
exp.typ = LOOKUP_EXP;
String name = operator.substring( 0, idx );
String value = operator.substring( idx+1 );
String values = operator.substring( idx+1 );
exp.lookupNameIdx = ctx.getLookupNameIdx( name );
if ( exp.lookupNameIdx < 0 )
{
throw new IllegalArgumentException( "unknown lookup name: " + name );
}
exp.lookupValueIdx = ctx.getLookupValueIdx( exp.lookupNameIdx, value );
if ( exp.lookupValueIdx < 0 )
StringTokenizer tk = new StringTokenizer( values, "|" );
int nt = tk.countTokens();
int nt2 = nt == 0 ? 1 : nt;
exp.lookupValueIdxArray = new int[nt2];
for( int ti=0; ti<nt2; ti++ )
{
throw new IllegalArgumentException( "unknown lookup value: " + value );
String value = ti < nt ? tk.nextToken() : "";
exp.lookupValueIdxArray[ti] = ctx.getLookupValueIdx( exp.lookupNameIdx, value );
if ( exp.lookupValueIdxArray[ti] < 0 )
{
throw new IllegalArgumentException( "unknown lookup value: " + value );
}
}
}
else if ( (idx = ctx.getVariableIdx( operator, false )) >= 0 )
@ -157,7 +166,7 @@ final class BExpression
case MAX_EXP: return max( op1.evaluate(ctx), op2.evaluate(ctx) );
case SWITCH_EXP: return op1.evaluate(ctx) != 0.f ? op2.evaluate(ctx) : op3.evaluate(ctx);
case ASSIGN_EXP: return ctx.assign( variableIdx, op1.evaluate(ctx) );
case LOOKUP_EXP: return ctx.getLookupMatch( lookupNameIdx, lookupValueIdx );
case LOOKUP_EXP: return ctx.getLookupMatch( lookupNameIdx, lookupValueIdxArray );
case NUMBER_EXP: return numberValue;
case VARIABLE_EXP: return ctx.getVariableValue( variableIdx );
case NOT_EXP: return op1.evaluate(ctx) == 0.f ? 1.f : 0.f;

11
brouter-expressions/src/main/java/btools/expressions/BExpressionContext.java
View file

@ -706,9 +706,16 @@ public final class BExpressionContext
return minWriteIdx;
}
float getLookupMatch( int nameIdx, int valueIdx )
float getLookupMatch( int nameIdx, int[] valueIdxArray )
{
return lookupData[nameIdx] == valueIdx ? 1.0f : 0.0f;
for( int i=0; i<valueIdxArray.length; i++ )
{
if ( lookupData[nameIdx] == valueIdxArray[i] )
{
return 1.0f;
}
}
return 0.0f;
}
public int getLookupNameIdx( String name )