Application: gvSIG desktop

package org.gvsig.expressionevaluator.spi.formatter.value;

import org.apache.commons.lang3.StringUtils;

import org.gvsig.expressionevaluator.ExpressionBuilder;

import static org.gvsig.expressionevaluator.ExpressionBuilder.FUNCTION_TUPLE;

import org.gvsig.expressionevaluator.ExpressionBuilder.Function;

import org.gvsig.expressionevaluator.ExpressionBuilder.Value;

import org.gvsig.expressionevaluator.Formatter;

/**

 *

 * @author jjdelcerro

 */

public class Tuple implements Formatter<Value> {

    private final Formatter<Value> formatter;

    public Tuple(Formatter<Value> formatter) {

        this.formatter = formatter;

    }

    @Override

    public boolean canApply(ExpressionBuilder.Value value) {

        if (value instanceof ExpressionBuilder.Function) {

            return StringUtils.equalsIgnoreCase(FUNCTION_TUPLE, ((Function) value).name());

        }

        return false;

    }

    @Override

    public String format(Value function0) {

        Function function = (Function) function0;

        StringBuilder builder = new StringBuilder();

        builder.append("ARRAY[");

        boolean first = true;

        for (Value argument : function.parameters()) {

            if( first ) {

                first=false;

                builder.append(argument.toString(formatter));

            } else {

                builder.append(", ");

                builder.append(argument.toString(formatter));

            }

        }

        builder.append("]");

        return builder.toString();

    }

}