tools/apksigner/core/src/com/android/apksigner/core/util/DataSources.java

package com.android.apksigner.core.util;

import com.android.apksigner.core.internal.util.ByteBufferDataSource;

import java.nio.ByteBuffer;

/**
 * Utility methods for working with {@link DataSource} abstraction.
 */
public abstract class DataSources {
    private DataSources() {}

    /**
     * Returns a {@link DataSource} backed by the provided {@link ByteBuffer}. The data source
     * represents the data contained between the position and limit of the buffer. Changes to the
     * buffer's contents will be visible in the data source.
     */
    public static DataSource asDataSource(ByteBuffer buffer) {
        if (buffer == null) {
            throw new NullPointerException();
        }
        return new ByteBufferDataSource(buffer);
    }
}