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fix a bug in ClobProxy 

Signed-off-by: Gavin King <gavin@hibernate.org>
This commit is contained in:
Gavin King 2024-11-04 11:16:14 +01:00
parent 2d9f58ae4b
commit d4b2d0fb9f
1 changed files with 68 additions and 55 deletions
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123
hibernate-core/src/main/java/org/hibernate/engine/jdbc/ClobProxy.java
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@ -97,65 +97,78 @@ public class ClobProxy implements InvocationHandler {
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
final String methodName = method.getName();
final int argCount = method.getParameterCount();
if ( "length".equals( methodName ) && argCount == 0 ) {
return getLength();
}
if ( "getUnderlyingStream".equals( methodName ) ) {
return getUnderlyingStream(); // Reset stream if needed.
}
if ( "getAsciiStream".equals( methodName ) && argCount == 0 ) {
return getAsciiStream();
}
if ( "getCharacterStream".equals( methodName ) ) {
if ( argCount == 0 ) {
return getCharacterStream();
}
else if ( argCount == 2 ) {
final long start = (Long) args[0];
if ( start < 1 ) {
throw new SQLException( "Start position 1-based; must be 1 or more." );
switch ( methodName ) {
case "length":
if ( argCount == 0 ) {
return getLength();
}
if ( start > getLength() ) {
throw new SQLException( "Start position [" + start + "] cannot exceed overall CLOB length [" + getLength() + "]" );
break;
case "getUnderlyingStream":
return getUnderlyingStream(); // Reset stream if needed
case "getCharacterStream":
if ( argCount == 0 ) {
return getCharacterStream();
}
final int length = (Integer) args[1];
if ( length < 0 ) {
// java docs specifically say for getCharacterStream(long,int) that the start+length must not exceed the
// total length, however that is at odds with the getSubString(long,int) behavior.
throw new SQLException( "Length must be great-than-or-equal to zero." );
else if ( argCount == 2 ) {
final long start = (Long) args[0];
if ( start < 1 ) {
throw new SQLException( "Start position 1-based; must be 1 or more." );
}
if ( start > getLength() + 1 ) {
throw new SQLException( "Start position [" + start + "] cannot exceed overall CLOB length [" + getLength() + "]" );
}
final int length = (Integer) args[1];
if ( length < 0 ) {
// javadoc for getCharacterStream(long,int) specify that the start+length must not exceed the
// total length (this is at odds with the behavior of getSubString(long,int))
throw new SQLException( "Length must be greater than or equal to zero" );
}
return DataHelper.subStream( getCharacterStream(), start-1, length );
}
return DataHelper.subStream( getCharacterStream(), start-1, length );
}
break;
case "getAsciiStream":
if ( argCount == 0 ) {
return getAsciiStream();
}
break;
case "getSubString":
if ( argCount == 2 ) {
final long start = (Long) args[0];
if ( start < 1 ) {
throw new SQLException( "Start position 1-based; must be 1 or more." );
}
if ( start > getLength() + 1 ) {
throw new SQLException( "Start position [" + start + "] cannot exceed overall CLOB length [" + getLength() + "]" );
}
final int length = (Integer) args[1];
if ( length < 0 ) {
throw new SQLException( "Length must be great-than-or-equal to zero." );
}
return getSubString( start-1, length );
}
break;
case "free":
if ( argCount == 0 ) {
characterStream.release();
return null;
}
break;
case "toString":
if ( argCount == 0 ) {
return this.toString();
}
break;
case "equals":
if ( argCount == 1 ) {
return proxy == args[0];
}
break;
case "hashCode":
if ( argCount == 0 ) {
return this.hashCode();
}
break;
}
if ( "getSubString".equals( methodName ) && argCount == 2 ) {
final long start = (Long) args[0];
if ( start < 1 ) {
throw new SQLException( "Start position 1-based; must be 1 or more." );
}
if ( start > getLength() ) {
throw new SQLException( "Start position [" + start + "] cannot exceed overall CLOB length [" + getLength() + "]" );
}
final int length = (Integer) args[1];
if ( length < 0 ) {
throw new SQLException( "Length must be great-than-or-equal to zero." );
}
return getSubString( start-1, length );
}
if ( "free".equals( methodName ) && argCount == 0 ) {
characterStream.release();
return null;
}
if ( "toString".equals( methodName ) && argCount == 0 ) {
return this.toString();
}
if ( "equals".equals( methodName ) && argCount == 1 ) {
return proxy == args[0];
}
if ( "hashCode".equals( methodName ) && argCount == 0 ) {
return this.hashCode();
}
throw new UnsupportedOperationException( "Clob may not be manipulated from creating session" );
}