jodd.petite.ParamManager Maven / Gradle / Ivy

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// Copyright (c) 2003-2014, Jodd Team (jodd.org). All Rights Reserved.

package jodd.petite;

import jodd.util.PropertiesUtil;
import jodd.util.StringPool;

import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;

/**
 * Parameter storage and resolver.
 */
public class ParamManager {

	protected final Map params;

	public ParamManager() {
		params = new HashMap();
	}

	/**
	 * Adds a parameter.
	 */
	public void put(String name, Object value) {
		params.put(name, value);
	}

	/**
	 * Returns parameter for given name or null
	 * if not found.
	 */
	public Object get(String name) {
		return params.get(name);
	}

	/**
	 * Returns an array of param keys that belongs to provided bean.
	 * Optionally resolves the value of returned parameters.
	 */
	public String[] resolve(String beanName, boolean resolveReferenceParams) {
		beanName = beanName + '.';

		List list = new ArrayList();
		for (Map.Entry entry : params.entrySet()) {
			String key = entry.getKey();
			if (key.startsWith(beanName) == false) {
				continue;
			}
			list.add(key);
			if (resolveReferenceParams == false) {
				continue;
			}
			// resolve all references
			String value = PropertiesUtil.resolveProperty(params, key);
			entry.setValue(value);
		}
		if (list.isEmpty()) {
			return StringPool.EMPTY_ARRAY;
		} else {
			return list.toArray(new String[list.size()]);
		}
	}

}