/*
 * Copyright 2009 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.gradle.api.changedetection.state;

import java.io.File;

/**
 * @author Tom Eyckmans
 */
class StateChangeEvent {
    private final File fileOrDirectory;
    private final StateFileItem oldState;
    private final StateFileItem newState;

    StateChangeEvent(final File fileOrDirectory, StateFileItem oldState, StateFileItem newState) {
        if ( fileOrDirectory == null ) throw new IllegalArgumentException("fileOrDirectory is null!");
        if ( oldState == null && newState == null ) throw new IllegalArgumentException("old and new state are null!");
        this.fileOrDirectory = fileOrDirectory;
        this.oldState = oldState;
        this.newState = newState;
    }

    public File getFileOrDirectory() {
        return fileOrDirectory;
    }

    public StateFileItem getOldState() {
        return oldState;
    }

    public StateFileItem getNewState() {
        return newState;
    }
}
