Application: gvSIG desktop

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

import java.util.List;

import org.apache.commons.lang3.StringUtils;

import org.gvsig.expressionevaluator.ExpressionBuilder;

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

import org.gvsig.expressionevaluator.ExpressionBuilder.Function;

import org.gvsig.expressionevaluator.ExpressionBuilder.Value;

import org.gvsig.expressionevaluator.Formatter;

/**

 *

 * @author jjdelcerro

 */

public class Dict implements Formatter<Value> {

    private final Formatter<Value> formatter;

    public Dict(Formatter<Value> formatter) {

        this.formatter = formatter;

    }

    @Override

    public boolean canApply(ExpressionBuilder.Value value) {

        if (value instanceof ExpressionBuilder.Function) {

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

        }

        return false;

    }

    @Override

    public String format(Value function0) {

        Function function = (Function) function0;

        List<Value> args = function.parameters();

        StringBuilder builder = new StringBuilder();

        builder.append("{ ");

        boolean needcomma = false;

        for (int i_key = 0, i_val = args.size()/2; i_key < args.size()/2; i_key++, i_val++) {

          Value key = args.get(i_key);

          Value  value = args.get(i_val);

          if( needcomma ) {

              builder.append(", ");

          } else {

              needcomma = true;

          }

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

          builder.append(":");

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

        }

        builder.append(" }");

        return builder.toString();

    }

}