com.almende.eve.agent.AgentBuilder.java Source code

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Here is the source code for com.almende.eve.agent.AgentBuilder.java

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/*
 * Copyright: Almende B.V. (2014), Rotterdam, The Netherlands
 * License: The Apache Software License, Version 2.0
 */
package com.almende.eve.agent;

import java.util.logging.Level;
import java.util.logging.Logger;

import com.almende.util.ClassUtil;
import com.fasterxml.jackson.databind.node.ObjectNode;

/**
 * The Class AgentBuilder.
 */
public class AgentBuilder {
    private static final Logger LOG = Logger.getLogger(AgentBuilder.class.getName());
    private ObjectNode parameters = null;
    private ClassLoader cl = getClass().getClassLoader();

    /**
     * With config
     * 
     * @param config
     *            the config
     * @return the agent builder
     */
    public AgentBuilder with(final ObjectNode config) {
        parameters = config;
        return this;
    }

    /**
     * Set a specific classloader for creating this agent.
     * 
     * @param cl
     *            the cl
     * @return the agent builder
     */
    public AgentBuilder withClassLoader(ClassLoader cl) {
        if (cl != null) {
            this.cl = cl;
        }
        return this;
    }

    /**
     * Builds the.
     * 
     * @return the agent
     */
    public Agent build() {
        if (parameters == null) {
            LOG.warning("AgentBuilder is not yet initialized!");
            return null;
        }
        final AgentConfig params = AgentConfig.decorate(parameters);
        final String className = params.getClassName();
        if (className == null) {
            LOG.warning("AgentBuilder requires configuration parameters: class");
            return null;
        }
        try {
            final Class<?> clazz = Class.forName(className, true, cl);
            if (clazz.equals(Agent.class) || ClassUtil.hasSuperClass(clazz, Agent.class)) {
                final Agent agent = (Agent) clazz.newInstance();
                agent.setConfig(parameters);
                return agent;
            } else {
                LOG.warning("The requested class doesn't extend Agent, which is required for the AgentBuilder");
            }
        } catch (Exception e) {
            LOG.log(Level.WARNING, "Couldn't instantiate the agentclass", e);
        }
        return null;
    }

}