org.mvel2.optimizers.impl.refl.nodes.InvokableAccessor Maven / Gradle / Ivy

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package org.mvel2.optimizers.impl.refl.nodes;

import static org.mvel2.DataConversion.convert;

import java.lang.reflect.Array;

import org.mvel2.compiler.ExecutableStatement;
import org.mvel2.integration.VariableResolverFactory;

public abstract class InvokableAccessor extends BaseAccessor {

    protected int length;
    protected ExecutableStatement[] parms;
    protected Class[] parameterTypes;
    protected boolean coercionNeeded = false;

    protected Object[] executeAndCoerce(Class[] target, Object elCtx, VariableResolverFactory vars, boolean isVarargs) {
        Object[] values = new Object[length];
        for (int i = 0; i < length && !(isVarargs && i >= length - 1); i++) {
            //noinspection unchecked
            values[i] = convert(parms[i].getValue(elCtx, vars), target[i]);
        }
        if (isVarargs) {
            Class componentType = target[length - 1].getComponentType();
            Object vararg;
            if (parms == null) {
                vararg = Array.newInstance(componentType, 0);
            } else {
                vararg = Array.newInstance(componentType, parms.length - length + 1);
                for (int i = length - 1; i < parms.length; i++) {
                    Array.set(vararg, i - length + 1, convert(parms[i].getValue(elCtx, vars), componentType));
                }
            }
            values[length - 1] = vararg;
        }
        return values;
    }

    public Class[] getParameterTypes() {
        return parameterTypes;
    }
}