com.dexcoder.dal.batis.ognl.ExpressionEvaluator Maven / Gradle / Ivy

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package com.dexcoder.dal.batis.ognl;

import java.lang.reflect.Array;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import com.dexcoder.dal.exceptions.JdbcAssistantException;

/**
 * Created by liyd on 2015-11-30.
 */
public class ExpressionEvaluator {

    public boolean evaluateBoolean(String expression, Object parameterObject) {
        Object value = OgnlCache.getValue(expression, parameterObject);
        if (value instanceof Boolean) {
            return (Boolean) value;
        }
        if (value instanceof Number) {
            return !new BigDecimal(String.valueOf(value)).equals(BigDecimal.ZERO);
        }
        return value != null;
    }

    @SuppressWarnings("rawtypes")
	public Iterable evaluateIterable(String expression, Object parameterObject) {
        Object value = OgnlCache.getValue(expression, parameterObject);
        if (value == null) {
            throw new JdbcAssistantException("The expression '" + expression + "' evaluated to a null value.");
        }
        if (value instanceof Iterable) {
            return (Iterable) value;
        }
        if (value.getClass().isArray()) {
            // the array may be primitive, so Arrays.asList() may throw
            // a ClassCastException (issue 209).  Do the work manually
            // Curse primitives! :) (JGB)
            int size = Array.getLength(value);
            List