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package net.sf.aguacate.function.spi.impl;

import java.text.MessageFormat;
import java.util.Collection;
import java.util.List;
import java.util.Map;

import net.sf.aguacate.function.FunctionContext;
import net.sf.aguacate.function.FunctionEvalResult;
import net.sf.aguacate.function.Parameter;
import net.sf.aguacate.function.spi.AbstractFunctionSql;

public class FunctionSqlSelectCount extends AbstractFunctionSql {

	private final String[] outputContext;

	private final String outputName;

	public FunctionSqlSelectCount(Collection methods, String name, String message, List parameters,
			List outputContext, String outputName, String table) {
		super(methods, name, message,
				MessageFormat.format("SELECT count(*) FROM {0} WHERE {1} = ?", table, parameters.get(0).getName()),
				new String[] { parameters.get(0).getName() }, new String[] { outputName });
		this.outputContext = outputContext.toArray(new String[outputContext.size()]);
		this.outputName = outputName;
	}

	@Override
	public FunctionEvalResult evaluate(FunctionContext functionContext, Map context) {
		return new FunctionEvalResult(null, selectSingle(functionContext, context));
	}

	@Override
	public String getOutputName() {
		return outputName;
	}

	@Override
	public String[] getOutputContext() {
		return outputContext;
	}

}