org.drools.clips.functions.CallFunction Maven / Gradle / Ivy

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/*
 * Copyright 2010 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.drools.clips.functions;

import org.drools.clips.Appendable;
import org.drools.clips.Function;
import org.drools.clips.FunctionHandlers;
import org.drools.clips.LispAtom;
import org.drools.clips.LispForm;
import org.drools.clips.SExpression;

public class CallFunction
    implements
    Function {
    private static final String name = "call";

    public String getName() {
        return name;
    }

    public void dump(LispForm lispForm,
                     Appendable appendable) {
        SExpression[] sExpressions = lispForm.getSExpressions();

        int offset = 0;
        if ( !"call".equals( ((LispAtom) sExpressions[0]).getValue().trim()) ) {
            offset = -1;
        }
        
        String name = ((LispAtom) sExpressions[offset+1]).getValue();

        String field = ((LispAtom) sExpressions[offset+2]).getValue().trim();
        field = field.substring( 1, field.length() -1  );

        appendable.append( name );
        appendable.append( "." );
        appendable.append( field );
        
        appendable.append( "(" );
        for ( int i = offset+3, length = sExpressions.length; i < length; i++) {
            FunctionHandlers.dump( sExpressions[i], appendable );
            
            if ( i != length -1 ) {
                appendable.append( ", " );
            }
        }
        appendable.append( ")" );
    }
}