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Gradle 6.9.1 API redistribution.

There is a newer version: 8.11.1

import java.io.File;
import java.io.Serializable;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

/**
 * An immutable classpath.
 */
public class JavaClass implements Serializable {
    private final List files;

    public JavaClass(Iterable files) {
        this.files = new ArrayList();
        for (File file : files) {
            this.files.add(file);
        }
    }

    public JavaClass(File... files) {
        this(Arrays.asList(files));
    }

    @Override
    public String toString() {
        return files.toString();
    }

    public boolean isEmpty() {
        return files.isEmpty();
    }

    public Collection getAsURIs() {
        List urls = new ArrayList();
        for (File file : files) {
            urls.add(file.toURI());
        }
        return urls;
    }

    public Collection getAsFiles() {
        return files;
    }

    public URL[] getAsURLArray() {
        Collection result = getAsURLs();
        return result.toArray(new URL[0]);
    }

    public Collection getAsURLs() {
        List urls = new ArrayList();
        for (File file : files) {
            try {
                urls.add(file.toURI().toURL());
            } catch (MalformedURLException e) {
                throw new RuntimeException(e);
            }
        }
        return urls;
    }

    public JavaClass plus(JavaClass other) {
        if (files.isEmpty()) {
            return other;
        }
        if (other.isEmpty()) {
            return this;
        }
        return new JavaClass(concat(files, other.getAsFiles()));
    }

    public JavaClass plus(Collection other) {
        if (other.isEmpty()) {
            return this;
        }
        return new JavaClass(concat(files, other));
    }

    private Iterable concat(List files1, Collection files2) {
        List result = new ArrayList();
        result.addAll(files1);
        result.addAll(files2);
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj == null || obj.getClass() != getClass()) {
            return false;
        }
        JavaClass other = (JavaClass) obj;
        return files.equals(other.files);
    }

    @Override
    public int hashCode() {
        return files.hashCode();
    }
}