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Concourse is a self-tuning database that is designed for both ad hoc analytics and high volume transactions at scale. Developers use Concourse to quickly build mission critical software while also benefiting from real time insight into their most important data. With Concourse, end-to-end data management requires no extra infrastructure, no prior configuration and no additional coding–all of which greatly reduce costs and allow developers to focus on core business problems.

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/*
 * Copyright (c) 2013-2019 Cinchapi Inc.
 *
 * 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.imca_cat.pollingwatchservice;

import java.nio.file.Path;
import java.nio.file.StandardWatchEventKinds;
import java.nio.file.WatchEvent;

/**
 * A {@code WatchEvent} implementation for {@link PollingWatchService}.
 */
class PollingWatchEvent implements WatchEvent {
    private final WatchEvent.Kind kind;
    private final T context;
    private int count;

    public PollingWatchEvent(WatchEvent.Kind kind, T context) {
        super();
        this.kind = kind;
        this.context = context;
        count = 1;
    }

    @Override
    public WatchEvent.Kind kind() {
        return kind;
    }

    public boolean isCreate() {
        return kind.equals(StandardWatchEventKinds.ENTRY_CREATE);
    }

    public boolean isModify() {
        return kind.equals(StandardWatchEventKinds.ENTRY_MODIFY);
    }

    public boolean isDelete() {
        return kind.equals(StandardWatchEventKinds.ENTRY_DELETE);
    }

    public boolean isOverflow() {
        return kind.equals(StandardWatchEventKinds.OVERFLOW);
    }

    @Override
    public int count() {
        return count;
    }

    public void incrementCount() {
        count++;
    }

    @Override
    public T context() {
        return context;
    }

    @Override
    public boolean equals(Object o) {
        if(this == o)
            return true;
        if(!(o instanceof PollingWatchEvent))
            return false;
        PollingWatchEvent e = (PollingWatchEvent) o;
        if(!(kind.equals(e.kind)))
            return false;
        return context.equals(e.context);
    }

    @Override
    public int hashCode() {
        int result = 17;
        result = 31 * result + kind.hashCode();
        result = 31 * result + context.hashCode();
        return result;
    }

    @Override
    public String toString() {
        return String.format("%s: %s", kind, context);
    }

    public static PollingWatchEvent create(Path p) {
        return new PollingWatchEvent(StandardWatchEventKinds.ENTRY_CREATE,
                p);
    }

    public static PollingWatchEvent modify(Path p) {
        return new PollingWatchEvent(StandardWatchEventKinds.ENTRY_MODIFY,
                p);
    }

    public static PollingWatchEvent delete(Path p) {
        return new PollingWatchEvent(StandardWatchEventKinds.ENTRY_DELETE,
                p);
    }

    public static PollingWatchEvent overflow(Object o) {
        return new PollingWatchEvent