package org.hibernate.jdbc;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.StaleStateException;
import org.hibernate.HibernateException;
import org.hibernate.engine.ExecuteUpdateResultCheckStyle;
import org.hibernate.util.JDBCExceptionReporter;
import org.hibernate.exception.GenericJDBCException;
import java.sql.CallableStatement;
import java.sql.SQLException;
import java.sql.PreparedStatement;
import java.sql.Types;
/**
* Holds various often used {@link Expectation} definitions.
*
* @author Steve Ebersole
*/
public class Expectations {
private static final Log log = LogFactory.getLog( Expectations.class );
public static final int USUAL_EXPECTED_COUNT = 1;
public static final int USUAL_PARAM_POSITION = 1;
// Base Expectation impls ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public static class BasicExpectation implements Expectation {
private final int expectedRowCount;
protected BasicExpectation(int expectedRowCount) {
this.expectedRowCount = expectedRowCount;
if ( expectedRowCount < 0 ) {
throw new IllegalArgumentException( "Expected row count must be greater than zero" );
}
}
public final void verifyOutcome(int rowCount, PreparedStatement statement, int batchPosition) {
rowCount = determineRowCount( rowCount, statement );
if ( batchPosition < 0 ) {
checkNonBatched( rowCount );
}
else {
checkBatched( rowCount, batchPosition );
}
}
private void checkBatched(int rowCount, int batchPosition) {
if ( rowCount == -2 ) {
if ( log.isDebugEnabled() ) {
log.debug( "success of batch update unknown: " + batchPosition );
}
}
else if ( rowCount == -3 ) {
throw new BatchFailedException( "Batch update failed: " + batchPosition );
}
else {
if ( expectedRowCount > rowCount ) {
throw new StaleStateException(
"Batch update returned unexpected row count from update [" + batchPosition +
"]; actual row count: " + rowCount +
"; expected: " + expectedRowCount
);
}
if ( expectedRowCount < rowCount ) {
String msg = "Batch update returned unexpected row count from update [" +
batchPosition + "]; actual row count: " + rowCount +
"; expected: " + expectedRowCount;
throw new BatchedTooManyRowsAffectedException( msg, expectedRowCount, rowCount, batchPosition );
}
}
}
private void checkNonBatched(int rowCount) {
if ( expectedRowCount > rowCount ) {
throw new StaleStateException(
"Unexpected row count: " + rowCount + "; expected: " + expectedRowCount
);
}
if ( expectedRowCount < rowCount ) {
String msg = "Unexpected row count: " + rowCount + "; expected: " + expectedRowCount;
throw new TooManyRowsAffectedException( msg, expectedRowCount, rowCount );
}
}
public int prepare(PreparedStatement statement) throws SQLException, HibernateException {
return 0;
}
public boolean canBeBatched() {
return true;
}
protected int determineRowCount(int reportedRowCount, PreparedStatement statement) {
return reportedRowCount;
}
}
public static class BasicParamExpectation extends BasicExpectation {
private final int parameterPosition;
protected BasicParamExpectation(int expectedRowCount, int parameterPosition) {
super( expectedRowCount );
this.parameterPosition = parameterPosition;
}
public int prepare(PreparedStatement statement) throws SQLException, HibernateException {
toCallableStatement( statement ).registerOutParameter( parameterPosition, Types.NUMERIC );
return 1;
}
public boolean canBeBatched() {
return false;
}
protected int determineRowCount(int reportedRowCount, PreparedStatement statement) {
try {
return toCallableStatement( statement ).getInt( parameterPosition );
}
catch( SQLException sqle ) {
JDBCExceptionReporter.logExceptions( sqle, "could not extract row counts from CallableStatement" );
throw new GenericJDBCException( "could not extract row counts from CallableStatement", sqle );
}
}
private CallableStatement toCallableStatement(PreparedStatement statement) {
if ( ! CallableStatement.class.isInstance( statement ) ) {
throw new HibernateException( "BasicParamExpectation operates exclusively on CallableStatements : " + statement.getClass() );
}
return ( CallableStatement ) statement;
}
}
// Various Expectation instances ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public static final Expectation NONE = new Expectation() {
public void verifyOutcome(int rowCount, PreparedStatement statement, int batchPosition) {
// explicitly perform no checking...
}
public int prepare(PreparedStatement statement) {
return 0;
}
public boolean canBeBatched() {
return true;
}
};
public static final Expectation BASIC = new BasicExpectation( USUAL_EXPECTED_COUNT );
public static final Expectation PARAM = new BasicParamExpectation( USUAL_EXPECTED_COUNT, USUAL_PARAM_POSITION );
public static Expectation appropriateExpectation(ExecuteUpdateResultCheckStyle style) {
if ( style == ExecuteUpdateResultCheckStyle.NONE ) {
return NONE;
}
else if ( style == ExecuteUpdateResultCheckStyle.COUNT ) {
return BASIC;
}
else if ( style == ExecuteUpdateResultCheckStyle.PARAM ) {
return PARAM;
}
else {
throw new HibernateException( "unknown check style : " + style );
}
}
private Expectations() {
}
}