com.google.uzaygezen.core.NodeValue.java Source code

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Here is the source code for com.google.uzaygezen.core.NodeValue.java

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/*
 * Copyright (C) 2008 Google 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 com.google.uzaygezen.core;

import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;

import com.google.common.base.Preconditions;

/**
 * Encapsulates a value and a flag indicating if the value's node is a leaf.
 * 
 * TODO: Add some unit tests.
 * 
 * @author Daniel Aioanei
 * 
 * @param <T> node value type
 */
public class NodeValue<T> {

    private final T value;

    private final boolean leaf;

    private NodeValue(T filter, boolean leaf) {
        this.value = Preconditions.checkNotNull(filter);
        this.leaf = leaf;
    }

    public static <T> NodeValue<T> of(T filter, boolean leaf) {
        return new NodeValue<T>(filter, leaf);
    }

    public T getValue() {
        return value;
    }

    public boolean isLeaf() {
        return leaf;
    }

    @Override
    public int hashCode() {
        return 31 * value.hashCode() + Boolean.valueOf(leaf).hashCode();
    }

    @Override
    public boolean equals(Object o) {
        if (!(o instanceof NodeValue<?>)) {
            return false;
        }
        NodeValue<?> other = (NodeValue<?>) o;
        return leaf == other.leaf && value.equals(other.value);
    }

    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
    }
}