io.cloudslang.schema.ConfValue.java Source code

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Here is the source code for io.cloudslang.schema.ConfValue.java

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/*******************************************************************************
* (c) Copyright 2014 Hewlett-Packard Development Company, L.P.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Apache License v2.0 which accompany this distribution.
*
* The Apache License is available at
* http://www.apache.org/licenses/LICENSE-2.0
*
*******************************************************************************/

package io.cloudslang.schema;

import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.util.StringUtils;
import org.w3c.dom.Element;

/**
* Date: 2/4/14
*
* @author
*/
class ConfValue {
    private String name;
    private Class<?> clazz;
    private Object defaultValue;

    public ConfValue NAME(String name) {
        this.name = name;
        return this;
    }

    public ConfValue CLASS(Class<?> clazz) {
        this.clazz = clazz;
        return this;
    }

    public ConfValue DEFAULT(Object defaultValue) {
        this.defaultValue = defaultValue;
        if (defaultValue != null)
            this.clazz = defaultValue.getClass();
        return this;
    }

    public void register(Element element, ParserContext parserContext) {
        String attrValue = element != null ? element.getAttribute(name) : null;
        new BeanRegistrator(parserContext).NAME(name).CLASS(clazz).addConstructorArgValue(fromString(attrValue))
                .register();
    }

    private Object fromString(String value) {
        value = System.getProperty("cloudslang.worker." + name, value);
        if (StringUtils.hasText(value)) {
            try {
                return clazz.getConstructor(String.class).newInstance(value);
            } catch (Exception ex) {
                throw new RuntimeException(
                        "Failed to parse worker configuration attribute [" + name + "] value: " + value, ex);
            }
        } else {
            return defaultValue;
        }
    }
}