If arbitrary parameter type conversions are required, then the setObject + *
If arbitrary parameter type conversions are required, then the setObject * method should be used with a target SQL type. * * @see ResultSet * @see java.sql.PreparedStatement */ -public class PreparedStatement extends Statement implements java.sql.PreparedStatement +public class PreparedStatement extends Statement implements java.sql.PreparedStatement { String sql; String[] templateStrings; @@ -124,7 +124,7 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta } s.append(templateStrings[inStrings.length]); return super.executeUpdate(s.toString()); // in Statement class - } + } /** * Set a parameter to SQL NULL @@ -264,7 +264,7 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta else { StringBuffer b = new StringBuffer(); int i; - + b.append('\''); for (i = 0 ; i < x.length() ; ++i) { @@ -327,7 +327,7 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta // //set(parameterIndex, df.format(new java.util.Date(x.getTime()+86400000))); } - + /** * Set a parameter to a java.sql.Time value. The driver converts * this to a SQL TIME value when it sends it to the database. @@ -406,7 +406,7 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta * When a very large binary value is input to a LONGVARBINARY parameter, * it may be more practical to send it via a java.io.InputStream. * JDBC will read the data from the stream as needed, until it reaches - * end-of-file. + * end-of-file. * *
Note: This stream object can either be a standard Java * stream object or your own subclass that implements the standard @@ -418,7 +418,25 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta */ public void setBinaryStream(int parameterIndex, InputStream x, int length) throws SQLException { - throw new PSQLException("postgresql.prep.is"); + LargeObjectManager lom = connection.getLargeObjectAPI(); + int oid = lom.create(); + LargeObject lob = lom.open(oid); + OutputStream los = lob.getOutputStream(); + try { + // could be buffered, but then the OutputStream returned by LargeObject + // is buffered internally anyhow, so there would be no performance + // boost gained, if anything it would be worse! + int c=x.read(); + while(c>-1) { + los.write(c); + c=x.read(); + } + los.close(); + } catch(IOException se) { + throw new PSQLException("postgresql.prep.is",se); + } + // lob is closed by the stream so don't call lob.close() + setInt(parameterIndex,oid); } /** @@ -453,7 +471,7 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta * @param x the object containing the input parameter value * @param targetSqlType The SQL type to be send to the database * @param scale For java.sql.Types.DECIMAL or java.sql.Types.NUMERIC - * types this is the number of digits after the decimal. For + * types this is the number of digits after the decimal. For * all other types this value will be ignored. * @exception SQLException if a database access error occurs */ @@ -501,7 +519,7 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta { setObject(parameterIndex, x, targetSqlType, 0); } - + /** * This stores an Object into a parameter. *
New for 6.4, if the object is not recognised, but it is @@ -542,7 +560,7 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta /** * Some prepared statements return multiple results; the execute method - * handles these complex statements as well as the simpler form of + * handles these complex statements as well as the simpler form of * statements handled by executeQuery and executeUpdate * * @return true if the next result is a ResultSet; false if it is an @@ -584,11 +602,11 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta s.append(templateStrings[inStrings.length]); return s.toString(); } - + // ************************************************************** - // END OF PUBLIC INTERFACE + // END OF PUBLIC INTERFACE // ************************************************************** - + /** * There are a lot of setXXX classes which all basically do * the same thing. We need a method which actually does the @@ -604,62 +622,62 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta throw new PSQLException("postgresql.prep.range"); inStrings[paramIndex - 1] = s; } - + // ** JDBC 2 Extensions ** - + public void addBatch() throws SQLException { throw org.postgresql.Driver.notImplemented(); } - + public java.sql.ResultSetMetaData getMetaData() throws SQLException { throw org.postgresql.Driver.notImplemented(); } - + public void setArray(int i,Array x) throws SQLException { throw org.postgresql.Driver.notImplemented(); } - + public void setBlob(int i,Blob x) throws SQLException { throw org.postgresql.Driver.notImplemented(); } - + public void setCharacterStream(int i,java.io.Reader x,int length) throws SQLException { throw org.postgresql.Driver.notImplemented(); } - + public void setClob(int i,Clob x) throws SQLException { throw org.postgresql.Driver.notImplemented(); } - + public void setNull(int i,int t,String s) throws SQLException { throw org.postgresql.Driver.notImplemented(); } - + public void setRef(int i,Ref x) throws SQLException { throw org.postgresql.Driver.notImplemented(); } - + public void setDate(int i,java.sql.Date d,java.util.Calendar cal) throws SQLException { throw org.postgresql.Driver.notImplemented(); } - + public void setTime(int i,Time t,java.util.Calendar cal) throws SQLException { throw org.postgresql.Driver.notImplemented(); } - + public void setTimestamp(int i,Timestamp t,java.util.Calendar cal) throws SQLException { throw org.postgresql.Driver.notImplemented(); } - + } diff --git a/src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java b/src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java index 59aef99ad5..14fe603b69 100644 --- a/src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java +++ b/src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java @@ -581,6 +581,15 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu */ public InputStream getBinaryStream(int columnIndex) throws SQLException { + // New in 7.1 Handle OID's as BLOBS so return the input stream + if(!wasNullFlag) + if( fields[columnIndex - 1].getOID() == 26) { + LargeObjectManager lom = connection.getLargeObjectAPI(); + LargeObject lob = lom.open(getInt(columnIndex)); + return lob.getInputStream(); + } + + // Not an OID so fake the stream byte b[] = getBytes(columnIndex); if (b != null) diff --git a/src/interfaces/jdbc/org/postgresql/jdbc2/Statement.java b/src/interfaces/jdbc/org/postgresql/jdbc2/Statement.java index 04315c096a..a0a40c1469 100644 --- a/src/interfaces/jdbc/org/postgresql/jdbc2/Statement.java +++ b/src/interfaces/jdbc/org/postgresql/jdbc2/Statement.java @@ -32,6 +32,7 @@ public class Statement implements java.sql.Statement private Vector batch=null; int resultsettype; // the resultset type to return int concurrency; // is it updateable or not? + int maxrows=0; // the maximum number of rows to return 0=unlimited /** * Constructor for a Statement. It simply sets the connection @@ -134,7 +135,7 @@ public class Statement implements java.sql.Statement */ public int getMaxRows() throws SQLException { - return connection.maxrows; + return maxrows; } /** @@ -146,7 +147,7 @@ public class Statement implements java.sql.Statement */ public void setMaxRows(int max) throws SQLException { - connection.maxrows = max; + maxrows = max; } /** @@ -274,7 +275,8 @@ public class Statement implements java.sql.Statement if(escapeProcessing) sql=connection.EscapeSQL(sql); - result = connection.ExecSQL(sql); + // New in 7.1, pass Statement so that ExecSQL can customise to it + result = connection.ExecSQL(sql,this); // New in 7.1, required for ResultSet.getStatement() to work ((org.postgresql.jdbc2.ResultSet)result).setStatement(this); @@ -388,11 +390,6 @@ public class Statement implements java.sql.Statement throw org.postgresql.Driver.notImplemented(); } - //public int getKeysetSize() throws SQLException - //{ -// throw org.postgresql.Driver.notImplemented(); - //} - public int getResultSetConcurrency() throws SQLException { // new in 7.1 @@ -415,11 +412,6 @@ public class Statement implements java.sql.Statement throw org.postgresql.Driver.notImplemented(); } - //public void setKeysetSize(int keys) throws SQLException - //{ -// throw org.postgresql.Driver.notImplemented(); - //} - public void setResultSetConcurrency(int value) throws SQLException { concurrency=value; @@ -430,4 +422,17 @@ public class Statement implements java.sql.Statement resultsettype=value; } + /** + * New in 7.1: Returns the Last inserted oid. This should be used, rather + * than the old method using getResultSet, which for executeUpdate returns + * null. + * @return OID of last insert + */ + public int getInsertedOID() throws SQLException + { + if(result!=null) + return ((org.postgresql.ResultSet)result).getInsertedOID(); + return 0; + } + } diff --git a/src/interfaces/jdbc/org/postgresql/largeobject/BlobInputStream.java b/src/interfaces/jdbc/org/postgresql/largeobject/BlobInputStream.java new file mode 100644 index 0000000000..646ea97005 --- /dev/null +++ b/src/interfaces/jdbc/org/postgresql/largeobject/BlobInputStream.java @@ -0,0 +1,156 @@ +package org.postgresql.largeobject; + +import java.io.InputStream; +import java.io.IOException; +import java.sql.SQLException; + +/** + * This is an initial implementation of an InputStream from a large object. + * For now, the bare minimum is implemented. Later (after 7.1) we will overide + * the other read methods to optimise them. + */ +public class BlobInputStream extends InputStream { + /** + * The parent LargeObject + */ + private LargeObject lo; + + /** + * Buffer used to improve performance + */ + private byte[] buffer; + + /** + * Position within buffer + */ + private int bpos; + + /** + * The buffer size + */ + private int bsize; + + /** + * The mark position + */ + private int mpos=0; + + /** + * @param lo LargeObject to read from + */ + public BlobInputStream(LargeObject lo) { + this(lo,1024); + } + + /** + * @param lo LargeObject to read from + * @param bsize buffer size + */ + public BlobInputStream(LargeObject lo,int bsize) { + this.lo=lo; + buffer=null; + bpos=0; + this.bsize=bsize; + } + + /** + * The minimum required to implement input stream + */ + public int read() throws java.io.IOException { + try { + if(buffer==null || bpos>=buffer.length) { + buffer=lo.read(bsize); + bpos=0; + } + + // Handle EOF + if(bpos>=buffer.length) + return -1; + + return (int) buffer[bpos++]; + } catch(SQLException se) { + throw new IOException(se.toString()); + } + } + + + /** + * Closes this input stream and releases any system resources associated + * with the stream. + * + *
The close method of InputStream does
+ * nothing.
+ *
+ * @exception IOException if an I/O error occurs.
+ */
+ public void close() throws IOException {
+ try {
+ lo.close();
+ lo=null;
+ } catch(SQLException se) {
+ throw new IOException(se.toString());
+ }
+ }
+
+ /**
+ * Marks the current position in this input stream. A subsequent call to
+ * the reset method repositions this stream at the last marked
+ * position so that subsequent reads re-read the same bytes.
+ *
+ *
The readlimit arguments tells this input stream to
+ * allow that many bytes to be read before the mark position gets
+ * invalidated.
+ *
+ *
The general contract of mark is that, if the method
+ * markSupported returns true, the stream somehow
+ * remembers all the bytes read after the call to mark and
+ * stands ready to supply those same bytes again if and whenever the method
+ * reset is called. However, the stream is not required to
+ * remember any data at all if more than readlimit bytes are
+ * read from the stream before reset is called.
+ *
+ *
The mark method of InputStream does
+ * nothing.
+ *
+ * @param readlimit the maximum limit of bytes that can be read before
+ * the mark position becomes invalid.
+ * @see java.io.InputStream#reset()
+ */
+ public synchronized void mark(int readlimit) {
+ try {
+ mpos=lo.tell();
+ } catch(SQLException se) {
+ //throw new IOException(se.toString());
+ }
+ }
+
+ /**
+ * Repositions this stream to the position at the time the
+ * mark method was last called on this input stream.
+ * NB: If mark is not called we move to the begining.
+ * @see java.io.InputStream#mark(int)
+ * @see java.io.IOException
+ */
+ public synchronized void reset() throws IOException {
+ try {
+ lo.seek(mpos);
+ } catch(SQLException se) {
+ throw new IOException(se.toString());
+ }
+ }
+
+ /**
+ * Tests if this input stream supports the mark and
+ * reset methods. The markSupported method of
+ * InputStream returns false.
+ *
+ * @return true if this true type supports the mark and reset
+ * method; false otherwise.
+ * @see java.io.InputStream#mark(int)
+ * @see java.io.InputStream#reset()
+ */
+ public boolean markSupported() {
+ return true;
+ }
+
+}
\ No newline at end of file
diff --git a/src/interfaces/jdbc/org/postgresql/largeobject/BlobOutputStream.java b/src/interfaces/jdbc/org/postgresql/largeobject/BlobOutputStream.java
new file mode 100644
index 0000000000..0ac435a78f
--- /dev/null
+++ b/src/interfaces/jdbc/org/postgresql/largeobject/BlobOutputStream.java
@@ -0,0 +1,102 @@
+package org.postgresql.largeobject;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.sql.SQLException;
+
+/**
+ * This implements a basic output stream that writes to a LargeObject
+ */
+public class BlobOutputStream extends OutputStream {
+ /**
+ * The parent LargeObject
+ */
+ private LargeObject lo;
+
+ /**
+ * Buffer
+ */
+ private byte buf[];
+
+ /**
+ * Size of the buffer (default 1K)
+ */
+ private int bsize;
+
+ /**
+ * Position within the buffer
+ */
+ private int bpos;
+
+ /**
+ * Create an OutputStream to a large object
+ * @param lo LargeObject
+ */
+ public BlobOutputStream(LargeObject lo) {
+ this(lo,1024);
+ }
+
+ /**
+ * Create an OutputStream to a large object
+ * @param lo LargeObject
+ * @param bsize The size of the buffer used to improve performance
+ */
+ public BlobOutputStream(LargeObject lo,int bsize) {
+ this.lo=lo;
+ this.bsize=bsize;
+ buf=new byte[bsize];
+ bpos=0;
+ }
+
+ public void write(int b) throws java.io.IOException {
+ try {
+ if(bpos>=bsize) {
+ lo.write(buf);
+ bpos=0;
+ }
+ buf[bpos++]=(byte)b;
+ } catch(SQLException se) {
+ throw new IOException(se.toString());
+ }
+ }
+
+ /**
+ * Flushes this output stream and forces any buffered output bytes
+ * to be written out. The general contract of flush is
+ * that calling it is an indication that, if any bytes previously
+ * written have been buffered by the implementation of the output
+ * stream, such bytes should immediately be written to their
+ * intended destination.
+ *
+ * @exception IOException if an I/O error occurs.
+ */
+ public void flush() throws IOException {
+ try {
+ if(bpos>0)
+ lo.write(buf,0,bpos);
+ bpos=0;
+ } catch(SQLException se) {
+ throw new IOException(se.toString());
+ }
+ }
+
+ /**
+ * Closes this output stream and releases any system resources
+ * associated with this stream. The general contract of close
+ * is that it closes the output stream. A closed stream cannot perform
+ * output operations and cannot be reopened.
+ *
+ * The close method of OutputStream does nothing.
+ *
+ * @exception IOException if an I/O error occurs.
+ */
+ public void close() throws IOException {
+ try {
+ lo.close();
+ lo=null;
+ } catch(SQLException se) {
+ throw new IOException(se.toString());
+ }
+ }
+
+}
\ No newline at end of file
diff --git a/src/interfaces/jdbc/org/postgresql/largeobject/LargeObject.java b/src/interfaces/jdbc/org/postgresql/largeobject/LargeObject.java
index 5cfd1383ff..c73301d131 100644
--- a/src/interfaces/jdbc/org/postgresql/largeobject/LargeObject.java
+++ b/src/interfaces/jdbc/org/postgresql/largeobject/LargeObject.java
@@ -16,7 +16,7 @@ import org.postgresql.fastpath.*;
* for this object.
*
*
Normally, client code would use the getAsciiStream, getBinaryStream, - * or getUnicodeStream methods in ResultSet, or setAsciiStream, + * or getUnicodeStream methods in ResultSet, or setAsciiStream, * setBinaryStream, or setUnicodeStream methods in PreparedStatement to * access Large Objects. * @@ -47,21 +47,21 @@ public class LargeObject * Indicates a seek from the begining of a file */ public static final int SEEK_SET = 0; - + /** * Indicates a seek from the current position */ public static final int SEEK_CUR = 1; - + /** * Indicates a seek from the end of a file */ public static final int SEEK_END = 2; - + private Fastpath fp; // Fastpath API to use private int oid; // OID of this object private int fd; // the descriptor of the open large object - + /** * This opens a large object. * @@ -78,13 +78,13 @@ public class LargeObject { this.fp = fp; this.oid = oid; - + FastpathArg args[] = new FastpathArg[2]; args[0] = new FastpathArg(oid); args[1] = new FastpathArg(mode); this.fd = fp.getInteger("lo_open",args); } - + /** * @return the OID of this LargeObject */ @@ -92,7 +92,7 @@ public class LargeObject { return oid; } - + /** * This method closes the object. You must not call methods in this * object after this is called. @@ -104,7 +104,7 @@ public class LargeObject args[0] = new FastpathArg(fd); fp.fastpath("lo_close",false,args); // true here as we dont care!! } - + /** * Reads some data from the object, and return as a byte[] array * @@ -120,7 +120,7 @@ public class LargeObject args[0] = new FastpathArg(fd); args[1] = new FastpathArg(len); return fp.getData("loread",args); - + // This version allows us to break this down into 4k blocks //if(len<=4048) { //// handle as before, return the whole block in one go @@ -145,20 +145,25 @@ public class LargeObject //return buf; //} } - + /** * Reads some data from the object into an existing array * * @param buf destination array * @param off offset within array * @param len number of bytes to read + * @return the number of bytes actually read * @exception SQLException if a database-access error occurs. */ - public void read(byte buf[],int off,int len) throws SQLException + public int read(byte buf[],int off,int len) throws SQLException { - System.arraycopy(read(len),0,buf,off,len); + byte b[] = read(len); + if(b.length