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An efficient event correlation library

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/**
 * Copyright 2016 Symantec Corporation.
 * 
 * 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 io.symcpe.wraith.conditions.relational;

import io.symcpe.wraith.Event;
import io.symcpe.wraith.conditions.AbstractSimpleCondition;

/**
 * Condition to see if a header value exists for an {@link Event}
 * 
 * @author ambud_sharma
 *
 */
public class ExistsCondition extends AbstractSimpleCondition {

	private static final long serialVersionUID = 1L;

	public ExistsCondition(String headerKey) {
		super(headerKey);
	}

	@Override
	public boolean satisfiesCondition(Object value) {
		return true;
	}

	/* (non-Javadoc)
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		return "Exists:"+getkey();
	}

}