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Groovy Eclipse Compiler wrapped for Batch Use from Maven

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/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
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package org.codehaus.groovy.reflection.stdclasses;

import org.codehaus.groovy.reflection.CachedClass;
import org.codehaus.groovy.reflection.CachedMethod;
import org.codehaus.groovy.reflection.ClassInfo;

public class CachedClosureClass extends CachedClass {
    private final Class[] parameterTypes;
    private final int maximumNumberOfParameters;

    public CachedClosureClass(Class klazz, ClassInfo classInfo) {
        super(klazz, classInfo);

        CachedMethod[] methods = getMethods();

        // set it to -1 for starters so parameterTypes will always get a type
        int maximumNumberOfParameters = -1;
        Class[] parameterTypes = null;

        for (CachedMethod method : methods) {
            if ("doCall".equals(method.getName())) {
                final Class[] pt = method.getNativeParameterTypes();
                if (pt.length > maximumNumberOfParameters) {
                    parameterTypes = pt;
                    maximumNumberOfParameters = parameterTypes.length;
                }
            }
        }
        // this line should be useless, but well, just in case
        maximumNumberOfParameters = Math.max(maximumNumberOfParameters,0);

        this.maximumNumberOfParameters = maximumNumberOfParameters;
        this.parameterTypes = parameterTypes;
    }

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

    public int getMaximumNumberOfParameters() {
        return maximumNumberOfParameters;
    }
}