gitlet/gitlet/gitlet/Commit.java at master · xUser5000/gitlet · GitHub

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package gitlet;

import java.io.File;

import java.io.Serializable;

import java.util.*;

import static gitlet.Utils.*;

/** Represents a gitlet commit object.

* @author xUser5000

public class Commit implements Serializable, Dumpable, Comparable<Commit> {

private final String message;

private final Date timestamp;

/** Original parent from the */

private final String parent;

private final String secondaryParent;

private final Map<String, String> trackedFiles;

private final String hash;

private Commit(String message, Date timestamp, String parent, String secondaryParent, Map<String, String> trackedFiles) {

this.message = message;

this.timestamp = (timestamp != null) ? timestamp : new Date();

this.parent = parent;

this.secondaryParent = secondaryParent;

this.trackedFiles = (trackedFiles != null) ? trackedFiles : new TreeMap<>();

this.hash = generateHash();

}

@Override

public int compareTo(Commit other) {

return this.getHash().compareTo(other.getHash());

}

/* Builder class */

public static class Builder {

private String message;

private Date timestamp;

private String parent;

private String secondaryParent;

private Map<String, String> trackedFiles;

public Builder(String message) {

this.message = message;

}

public Builder timestamp(Date timestamp) {

this.timestamp = timestamp;

return this;

}

public Builder parent(String parent) {

this.parent = parent;

return this;

}

public Builder secondaryParent(String secondaryParent) {

this.secondaryParent = secondaryParent;

return this;

}

public Builder trackedFiles(Map<String, String> trackedFiles) {

this.trackedFiles = trackedFiles;

return this;

}

public Commit build() {

return new Commit(message, timestamp, parent, secondaryParent, trackedFiles);

}

private String generateHash() {

List<Object> hashItems = new ArrayList<>();

hashItems.add(message);

hashItems.add(timestamp.toString());

hashItems.add((parent == null) ? "" : parent);

hashItems.add((secondaryParent == null) ? "" : secondaryParent);

for (Map.Entry<String, String> entry: trackedFiles.entrySet()) {

hashItems.add(entry.toString());

}

return sha1(hashItems);

}

public Date getTimestamp() {

return timestamp;

}

public String getMessage() {

return message;

}

public String getParent() {

return parent;

}

public String getSecondaryParent() {

return secondaryParent;

}

public Map<String, String> getTrackedFiles() {

return trackedFiles;

}

public String getHash() {

return hash;

}

public void saveCommit(File commitsDirectory) {

File commitFile = join(commitsDirectory, hash);

writeObject(commitFile, this);

}

public String log() {

StringBuilder builder = new StringBuilder();

builder.append("===\n");

builder.append(String.format("commit %s\n", getHash()));

if (getParent() != null && getSecondaryParent() != null) {

builder.append(

String.format("Merge: %s %s\n", getParent().substring(0, 7), getSecondaryParent().substring(0, 7))

);

}

Formatter formatter = new Formatter().format("Date: %1$ta %1$tb %1$td %1$tT %1$tY %1$tz", getTimestamp());

String formattedDate = formatter.toString();

builder.append(String.format("%s\n", formattedDate));

builder.append(String.format("%s\n\n", getMessage()));

return builder.toString();

}

@Override

public boolean equals(Object obj) {

if (obj instanceof Commit) {

return ((Commit) obj).getHash().equals(this.getHash());

}

return false;

}

@Override

public String toString() {

return "Commit{" +

"timestamp=" + timestamp +

", message='" + message + '\'' +

", parent='" + parent + '\'' +

", secondaryParent='" + secondaryParent + '\'' +

", trackedFiles=" + trackedFiles +

", hash='" + hash + '\'' +

'}';

}

@Override

public void dump() {

System.out.println(this);

}

gitlet/gitlet/gitlet/Commit.java at master · xUser5000/gitlet · GitHub

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