Apache Commons Lang 3 is the 3rd version of Apache Commons Lang, which provides a host of helper utilities for the java.lang API.

Apache Commons Lang 3 Source Code files are provided in both binary packge (commons-lang3-3.12.0-bin.zip) and source package (commons-lang3-3.12.0-src.zip). You can download them at Apache Commons Lang Website.

Apache Commons Lang 3 Source Code has no dependencies and is compatible with Java 8 and newer versions. You can compile it to generate your own version of Apache Commons Lang 3 JAR file.

You can also browse the source code below:

⏎ org/apache/commons/lang3/builder/Diff.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.commons.lang3.builder;

import java.lang.reflect.Type;

import org.apache.commons.lang3.ObjectUtils;
import org.apache.commons.lang3.reflect.TypeUtils;
import org.apache.commons.lang3.tuple.Pair;

/**
 * <p>
 * A {@code Diff} contains the differences between two {@link Diffable} class
 * fields.
 * </p>
 *
 * <p>
 * Typically, {@code Diff}s are retrieved by using a {@link DiffBuilder} to
 * produce a {@link DiffResult}, containing the differences between two objects.
 * </p>
 *
 *
 * @param <T>
 *            The type of object contained within this {@code Diff}. Differences
 *            between primitive objects are stored as their Object wrapper
 *            equivalent.
 * @since 3.3
 */
public abstract class Diff<T> extends Pair<T, T> {

    private static final long serialVersionUID = 1L;

    private final Type type;
    private final String fieldName;

    /**
     * <p>
     * Constructs a new {@code Diff} for the given field name.
     * </p>
     *
     * @param fieldName
     *            the name of the field
     */
    protected Diff(final String fieldName) {
        this.type = ObjectUtils.defaultIfNull(
                TypeUtils.getTypeArguments(getClass(), Diff.class).get(
                        Diff.class.getTypeParameters()[0]), Object.class);
        this.fieldName = fieldName;
    }

    /**
     * <p>
     * Returns the type of the field.
     * </p>
     *
     * @return the field type
     */
    public final Type getType() {
        return type;
    }

    /**
     * <p>
     * Returns the name of the field.
     * </p>
     *
     * @return the field name
     */
    public final String getFieldName() {
        return fieldName;
    }

    /**
     * <p>
     * Returns a {@code String} representation of the {@code Diff}, with the
     * following format:</p>
     *
     * <pre>
     * [fieldname: left-value, right-value]
     * </pre>
     *
     *
     * @return the string representation
     */
    @Override
    public final String toString() {
        return String.format("[%s: %s, %s]", fieldName, getLeft(), getRight());
    }

    /**
     * <p>
     * Throws {@code UnsupportedOperationException}.
     * </p>
     *
     * @param value
     *            ignored
     * @return nothing
     */
    @Override
    public final T setValue(final T value) {
        throw new UnsupportedOperationException("Cannot alter Diff object.");
    }
}

⏎ org/apache/commons/lang3/builder/Diff.java

Or download all of them as a single archive file:

File name: commons-lang3-3.12.0-sources.jar
File size: 651724 bytes
Release date: 2020-01-22
Download 

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⇐ Download Apache Commons Lang v3 Source Package

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