[7.0] HHH-19464 storing a binary data into blob on oracle cutting off its content

hibernate-core/src/main/java/org/hibernate/type/descriptor/java/DataHelper.java

@@ -220,10 +220,6 @@ public static byte[] extractBytes(InputStream inputStream, long start, int lengt
 					break;
 				}
 				outputStream.write( buffer, 0, amountRead );
-				if ( amountRead < buffer.length ) {
-					// we have read up to the end of stream
-					break;
-				}
 				bytesRead += amountRead;
 				if ( bytesRead >= length ) {
 					break;

hibernate-core/src/test/java/org/hibernate/orm/test/lob/InflaterInputStreamBlobTest.java

@@ -0,0 +1,117 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright Red Hat Inc. and Hibernate Authors
+ */
+package org.hibernate.orm.test.lob;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Lob;
+import org.hibernate.engine.jdbc.env.internal.NonContextualLobCreator;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.sql.Blob;
+import java.sql.SQLException;
+import java.util.Random;
+import java.util.zip.GZIPInputStream;
+import java.util.zip.GZIPOutputStream;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@DomainModel(annotatedClasses = InflaterInputStreamBlobTest.TestEntity.class)
+@SessionFactory
+@JiraKey("HHH-19464")
+class InflaterInputStreamBlobTest {
+
+	private static final int RANDOM_SIZE = 32000;
+
+	@Test
+	void hibernate_blob_streaming(SessionFactoryScope scope) throws Exception {
+		final var randomBytes = getRandomBytes();
+		final var outputStream = new ByteArrayOutputStream();
+		try (var zipOutputStream = new GZIPOutputStream( outputStream )) {
+			zipOutputStream.write( randomBytes );
+		}
+
+		long size = randomBytes.length;
+		scope.inTransaction( entityManager -> {
+					try {
+						InputStream is = new GZIPInputStream( new ByteArrayInputStream( outputStream.toByteArray() ) );
+						Blob blob = NonContextualLobCreator.INSTANCE.wrap(
+								NonContextualLobCreator.INSTANCE.createBlob( is, size )
+						);
+						TestEntity e = new TestEntity();
+						e.setId( 1L );
+						e.setData( blob );
+
+						entityManager.persist( e );
+					}
+					catch (IOException e) {
+						throw new RuntimeException( e );
+					}
+				}
+		);
+
+		scope.inStatelessSession( session -> {
+			final var entity = session.get( TestEntity.class, 1L );
+			try {
+				final var blob = entity.getData();
+				assertEquals( size, blob.length() );
+				assertArrayEquals( randomBytes, blob.getBytes( 1L, (int) blob.length() ) );
+			}
+			catch (SQLException e) {
+				throw new RuntimeException( e );
+			}
+		} );
+	}
+
+	private static byte[] getRandomBytes() {
+		final var bytes = new byte[RANDOM_SIZE];
+		new Random().nextBytes( bytes );
+		return bytes;
+	}
+
+	@Entity
+	public static class TestEntity {
+
+		@Id
+		Long id;
+
+		@Lob
+		Blob data;
+
+		public Long getId() {
+			return id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public Blob getData() {
+			return data;
+		}
+
+		public InputStream getInputStream() {
+			try {
+				return data.getBinaryStream();
+			}
+			catch (SQLException e) {
+				throw new IllegalArgumentException( "Could not obtain requested input stream", e );
+			}
+		}
+
+		public void setData(Blob data) {
+			this.data = data;
+		}
+	}
+}