/*
 * Copyright 2016 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.integration.support.management.graph;

import java.util.HashMap;
import java.util.Map;

import org.springframework.expression.Expression;
import org.springframework.integration.context.ExpressionCapable;
import org.springframework.integration.support.context.NamedComponent;

/**
 * Base class for all nodes.
 *
 * @author Gary Russell
 * @since 4.3
 *
 */
public abstract class IntegrationNode {

	private final int nodeId;

	private final String name;

	private final Stats stats;

	private final String componentType;

	private final Map<String, Object> properties = new HashMap<String, Object>();

	protected IntegrationNode(int nodeId, String name, Object nodeObject, Stats stats) {
		this.nodeId = nodeId;
		this.name = name;
		this.componentType = nodeObject instanceof NamedComponent ? ((NamedComponent) nodeObject).getComponentType()
				: nodeObject.getClass().getSimpleName();
		this.stats = stats;
		if (nodeObject instanceof ExpressionCapable) {
			Expression expression = ((ExpressionCapable) nodeObject).getExpression();
			if (expression != null) {
				this.properties.put("expression", expression.getExpressionString());
			}
		}
	}

	public int getNodeId() {
		return this.nodeId;
	}

	public String getName() {
		return this.name;
	}

	public String getComponentType() {
		return this.componentType;
	}

	public Stats getStats() {
		return this.stats.isAvailable() ? this.stats : null;
	}

	public Map<String, Object> getProperties() {
		return this.properties.size() == 0 ? null : this.properties;
	}

	public static class Stats {

		protected boolean isAvailable() {
			return false;
		}

	}

}