BatchDecoder: basic decoder v_0
authorFrantišek Kučera <franta-hg@frantovo.cz>
Wed, 08 Jan 2014 19:18:52 +0100
branchv_0
changeset 146 4f4f515df807
parent 145 5f90decd3b59
child 147 4a704c1669f4
BatchDecoder: basic decoder
java/sql-dk/src/info/globalcode/sql/dk/CLIOptions.java
java/sql-dk/src/info/globalcode/sql/dk/CLIStarter.java
java/sql-dk/src/info/globalcode/sql/dk/DatabaseConnection.java
java/sql-dk/src/info/globalcode/sql/dk/SQLType.java
java/sql-dk/src/info/globalcode/sql/dk/batch/Batch.java
java/sql-dk/src/info/globalcode/sql/dk/batch/BatchConstants.java
java/sql-dk/src/info/globalcode/sql/dk/batch/BatchDecoder.java
java/sql-dk/src/info/globalcode/sql/dk/batch/BatchEncoder.java
--- a/java/sql-dk/src/info/globalcode/sql/dk/CLIOptions.java	Wed Jan 08 14:50:26 2014 +0100
+++ b/java/sql-dk/src/info/globalcode/sql/dk/CLIOptions.java	Wed Jan 08 19:18:52 2014 +0100
@@ -22,6 +22,7 @@
 import info.globalcode.sql.dk.InfoLister.InfoType;
 import info.globalcode.sql.dk.configuration.Properties;
 import info.globalcode.sql.dk.configuration.Property;
+import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.Collection;
@@ -250,4 +251,8 @@
 	public OutputStream getOutputStream() {
 		return System.out;
 	}
+
+	public InputStream getInputStream() {
+		return System.in;
+	}
 }
--- a/java/sql-dk/src/info/globalcode/sql/dk/CLIStarter.java	Wed Jan 08 14:50:26 2014 +0100
+++ b/java/sql-dk/src/info/globalcode/sql/dk/CLIStarter.java	Wed Jan 08 19:18:52 2014 +0100
@@ -19,6 +19,8 @@
 
 import info.globalcode.sql.dk.configuration.ConfigurationProvider;
 import info.globalcode.sql.dk.CLIOptions.MODE;
+import info.globalcode.sql.dk.batch.Batch;
+import info.globalcode.sql.dk.batch.BatchDecoder;
 import info.globalcode.sql.dk.batch.BatchException;
 import info.globalcode.sql.dk.batch.BatchEncoder;
 import info.globalcode.sql.dk.configuration.Configuration;
@@ -158,7 +160,18 @@
 		log.log(Level.FINE, "Prepared batch size: {0} bytes", length);
 	}
 
-	private void processExecuteBatch() {
+	private void processExecuteBatch() throws ConfigurationException, SQLException, FormatterException, BatchException {
+		BatchDecoder dec = new BatchDecoder();
+		Batch b = dec.decode(options.getInputStream());
+
+		DatabaseDefinition dd = getConfiguration().getDatabase(options.getDatabaseName());
+		FormatterDefinition fd = configuration.getFormatter(options.getFormatterName());
+		try (DatabaseConnection c = dd.connect(options.getDatabaseProperties())) {
+			log.log(Level.FINE, "Database connected");
+			try (Formatter f = fd.getInstance(new FormatterContext(options.getOutputStream(), options.getFormatterProperties()))) {
+				c.executeBatch(b, f);
+			}
+		}
 	}
 
 	@Override
--- a/java/sql-dk/src/info/globalcode/sql/dk/DatabaseConnection.java	Wed Jan 08 14:50:26 2014 +0100
+++ b/java/sql-dk/src/info/globalcode/sql/dk/DatabaseConnection.java	Wed Jan 08 19:18:52 2014 +0100
@@ -18,6 +18,7 @@
 package info.globalcode.sql.dk;
 
 import info.globalcode.sql.dk.batch.Batch;
+import info.globalcode.sql.dk.batch.BatchException;
 import info.globalcode.sql.dk.configuration.DatabaseDefinition;
 import info.globalcode.sql.dk.configuration.Properties;
 import info.globalcode.sql.dk.configuration.Property;
@@ -75,7 +76,7 @@
 		formatter.writeEndBatch();
 	}
 
-	public void executeBatch(Batch batch, Formatter formatter) throws SQLException {
+	public void executeBatch(Batch batch, Formatter formatter) throws SQLException, BatchException {
 		formatter.writeStartBatch();
 		formatter.writeStartDatabase(databaseDefinition);
 		while (batch.hasNext()) {
--- a/java/sql-dk/src/info/globalcode/sql/dk/SQLType.java	Wed Jan 08 14:50:26 2014 +0100
+++ b/java/sql-dk/src/info/globalcode/sql/dk/SQLType.java	Wed Jan 08 19:18:52 2014 +0100
@@ -83,7 +83,7 @@
 	 * @return found SQLType
 	 * @throws IllegalArgumentException if no data type has given code
 	 */
-	public SQLType valueOf(int code) {
+	public static SQLType valueOf(int code) {
 		for (SQLType t : values()) {
 			if (t.code == code) {
 				return t;
--- a/java/sql-dk/src/info/globalcode/sql/dk/batch/Batch.java	Wed Jan 08 14:50:26 2014 +0100
+++ b/java/sql-dk/src/info/globalcode/sql/dk/batch/Batch.java	Wed Jan 08 19:18:52 2014 +0100
@@ -18,28 +18,14 @@
 package info.globalcode.sql.dk.batch;
 
 import info.globalcode.sql.dk.SQLCommand;
-import java.util.Iterator;
 
 /**
  *
  * @author Ing. František Kučera (frantovo.cz)
  */
-public class Batch implements Iterator<SQLCommand> {
-
-	@Override
-	public boolean hasNext() {
-		/** TODO: implement iterator */
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
+public interface Batch {
 
-	@Override
-	public SQLCommand next() {
-		/** TODO: implement iterator */
-		throw new UnsupportedOperationException("Not supported yet.");
-	}
+	public boolean hasNext() throws BatchException;
 
-	@Override
-	public void remove() {
-		throw new UnsupportedOperationException("remove() is not supported");
-	}
+	public SQLCommand next() throws BatchException;
 }
--- a/java/sql-dk/src/info/globalcode/sql/dk/batch/BatchConstants.java	Wed Jan 08 14:50:26 2014 +0100
+++ b/java/sql-dk/src/info/globalcode/sql/dk/batch/BatchConstants.java	Wed Jan 08 19:18:52 2014 +0100
@@ -28,7 +28,7 @@
 
 	public static final Charset CHARSET = StandardCharsets.UTF_8;
 	public static final byte VERSION = 0x01;
-	public static final byte[] BATCH_START = {0x00, 0x53, 0x51, 0x4C, VERSION};
+	public static final byte[] BATCH_HEADER = {0x00, 0x53, 0x51, 0x4C, VERSION};
 
 	private BatchConstants() {
 	}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/java/sql-dk/src/info/globalcode/sql/dk/batch/BatchDecoder.java	Wed Jan 08 19:18:52 2014 +0100
@@ -0,0 +1,110 @@
+/**
+ * SQL-DK
+ * Copyright © 2014 František Kučera (frantovo.cz)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package info.globalcode.sql.dk.batch;
+
+import info.globalcode.sql.dk.Parameter;
+import info.globalcode.sql.dk.SQLCommand;
+import info.globalcode.sql.dk.SQLCommandNumbered;
+import java.io.DataInputStream;
+import java.io.InputStream;
+import static info.globalcode.sql.dk.batch.BatchConstants.*;
+import static info.globalcode.sql.dk.Functions.toHex;
+import info.globalcode.sql.dk.SQLType;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ *
+ * @author Ing. František Kučera (frantovo.cz)
+ */
+public class BatchDecoder {
+
+	public Batch decode(InputStream in) throws BatchException {
+		return new BatchFromStream(new DataInputStream(in));
+
+	}
+
+	private class BatchFromStream implements Batch {
+
+		private DataInputStream in;
+		private boolean hasNext;
+
+		public BatchFromStream(DataInputStream in) throws BatchException {
+			this.in = in;
+			hasNext = verifyHeader();
+		}
+
+		@Override
+		public boolean hasNext() throws BatchException {
+			return hasNext;
+		}
+
+		@Override
+		public SQLCommand next() throws BatchException {
+			try {
+				String sql = readNextString();
+
+				int paramCount = in.readInt();
+				List<Parameter> parameters = new ArrayList<>(paramCount);
+
+				for (int i = 0; i < paramCount; i++) {
+					SQLType type = SQLType.valueOf(in.readInt());
+					String value = readNextString();
+					parameters.add(new Parameter(value, type));
+				}
+
+				hasNext = verifyHeader();
+
+				SQLCommand sqlCommand = new SQLCommandNumbered(sql, parameters);
+				return sqlCommand;
+			} catch (IOException e) {
+				throw new BatchException("Unable to read batch", e);
+			}
+		}
+
+		private String readNextString() throws IOException {
+			byte[] buffer = new byte[in.readInt()];
+			in.read(buffer);
+			return new String(buffer, CHARSET);
+		}
+
+		/**
+		 * @return true if correct batch header was found | false if EOF was found
+		 * @throws BatchException if unexpected data was found (not batch header nor EOF)
+		 */
+		private boolean verifyHeader() throws BatchException {
+			try {
+				byte[] buffer = new byte[BATCH_HEADER.length];
+				int bytesRead = in.read(buffer);
+
+				if (bytesRead == BATCH_HEADER.length && Arrays.equals(buffer, BATCH_HEADER)) {
+					return true;
+				} else if (bytesRead == -1) {
+					return false;
+				} else {
+					throw new BatchException("This is not SQL-DK batch: " + toHex(buffer));
+				}
+			} catch (IOException e) {
+				throw new BatchException("Unable to read batch header", e);
+			}
+
+		}
+	}
+}
--- a/java/sql-dk/src/info/globalcode/sql/dk/batch/BatchEncoder.java	Wed Jan 08 14:50:26 2014 +0100
+++ b/java/sql-dk/src/info/globalcode/sql/dk/batch/BatchEncoder.java	Wed Jan 08 19:18:52 2014 +0100
@@ -39,7 +39,7 @@
 			ByteArrayOutputStream bufferAOS = new ByteArrayOutputStream();
 			DataOutputStream buffer = new DataOutputStream(bufferAOS);
 
-			buffer.write(BATCH_START);
+			buffer.write(BATCH_HEADER);
 
 			if (sqlCommand instanceof SQLCommandNamed) {
 				sqlCommand = ((SQLCommandNamed) sqlCommand).getSQLCommandNumbered();