/*
 * Copyright 2004-2012 the original author or authors.
 *
 * Licensed 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.
 */
package org.springframework.webflow.config;

import java.util.Collections;
import java.util.Set;

import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.StringUtils;

/**
 * A low-level pointer to a flow definition that will be registered in a flow registry and built by a concrete flow
 * builder implementation class.
 * 
 * @author Keith Donald
 */
class FlowBuilderInfo {

	/**
	 * The id to assign to the flow definition.
	 */
	private String id;

	/**
	 * The fully-qualified flow builder implementation class.
	 */
	private String className;

	/**
	 * Attributes to assign to the flow definition.
	 */
	private Set<FlowElementAttribute> attributes;

	public FlowBuilderInfo(String id, String className, Set<FlowElementAttribute> attributes) {
		Assert.hasText(className, "The fully-qualified FlowBuilder class name is required");
		this.className = className;
		setId(id);
		this.attributes = (attributes != null ? attributes : Collections.<FlowElementAttribute> emptySet());
	}

	private void setId(String id) {
		if (StringUtils.hasText(id)) {
			this.id = id;
		} else {
			this.id = StringUtils.uncapitalize(StringUtils.delete(ClassUtils.getShortName(className), "FlowBuilder"));
		}
	}

	public String getId() {
		return id;
	}

	public String getClassName() {
		return className;
	}

	public Set<FlowElementAttribute> getAttributes() {
		return attributes;
	}
}