make use of Length constants in Dialects instead of Integer.MAX_VALUE

Signed-off-by: Gavin King <gavin@hibernate.org>

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/PostgreSQLLegacyDialect.java

@@ -19,6 +19,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.TimeZone;
 
+import org.hibernate.Length;
 import org.hibernate.LockMode;
 import org.hibernate.LockOptions;
 import org.hibernate.PessimisticLockException;
@@ -280,7 +281,7 @@ public class PostgreSQLLegacyDialect extends Dialect {
 	@Override
 	public int getMaxVarbinaryLength() {
 		//postgres has no varbinary-like type
-		return Integer.MAX_VALUE;
+		return Length.LONG32;
 	}
 
 	@Override

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/SQLServerLegacyDialect.java

@@ -289,7 +289,7 @@ public class SQLServerLegacyDialect extends AbstractTransactSQLDialect {
 		// this is essentially the only legal length for
 		// a "lob" in SQL Server, i.e. the value of MAX
 		// (caveat: for NVARCHAR it is half this value)
-		return Integer.MAX_VALUE;
+		return Length.LONG32;
 	}
 
 	@Override

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/SybaseAnywhereDialect.java

@@ -9,6 +9,7 @@ package org.hibernate.community.dialect;
 
 import java.util.Map;
 
+import org.hibernate.Length;
 import org.hibernate.LockOptions;
 import org.hibernate.boot.model.FunctionContributions;
 import org.hibernate.community.dialect.identity.SybaseAnywhereIdentityColumnSupport;
@@ -103,7 +104,7 @@ public class SybaseAnywhereDialect extends SybaseDialect {
 
 	@Override
 	public int getMaxVarcharLength() {
-		return 32_767;
+		return Length.LONG16;
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/Dialect.java

@@ -4760,7 +4760,7 @@ public abstract class Dialect implements ConversionContext, TypeContributor, Fun
 	 */
 	public int getMaxVarcharLength() {
 		//the longest possible length of a Java string
-		return Integer.MAX_VALUE;
+		return Length.LONG32;
 	}
 
 	/**

hibernate-core/src/main/java/org/hibernate/dialect/MySQLDialect.java

@@ -17,6 +17,7 @@ import java.util.Calendar;
 import java.util.Date;
 import java.util.TimeZone;
 
+import org.hibernate.Length;
 import org.hibernate.LockOptions;
 import org.hibernate.PessimisticLockException;
 import org.hibernate.boot.model.FunctionContributions;
@@ -534,7 +535,7 @@ public class MySQLDialect extends Dialect {
 
 	@Override
 	public long getDefaultLobLength() {
-		return Integer.MAX_VALUE;
+		return Length.LONG32;
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/OracleDialect.java

@@ -17,6 +17,7 @@ import java.util.TimeZone;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import org.hibernate.Length;
 import org.hibernate.QueryTimeoutException;
 import org.hibernate.boot.model.FunctionContributions;
 import org.hibernate.boot.model.TypeContributions;
@@ -390,13 +391,13 @@ public class OracleDialect extends Dialect {
 	@Override
 	public int getMaxVarcharLength() {
 		//with MAX_STRING_SIZE=EXTENDED, changes to 32_767
-		return extended ? 32_767 : 4000;
+		return extended ? Length.LONG16 : 4000;
 	}
 
 	@Override
 	public int getMaxVarbinaryLength() {
 		//with MAX_STRING_SIZE=EXTENDED, changes to 32_767
-		return extended ? 32_767 : 2000;
+		return extended ? Length.LONG16 : 2000;
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQLDialect.java

@@ -19,6 +19,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.TimeZone;
 
+import org.hibernate.Length;
 import org.hibernate.LockMode;
 import org.hibernate.LockOptions;
 import org.hibernate.PessimisticLockException;
@@ -298,7 +299,7 @@ public class PostgreSQLDialect extends Dialect {
 	@Override
 	public int getMaxVarbinaryLength() {
 		//postgres has no varbinary-like type
-		return Integer.MAX_VALUE;
+		return Length.LONG32;
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/SQLServerDialect.java

@@ -16,6 +16,7 @@ import java.util.Date;
 import java.util.List;
 import java.util.TimeZone;
 
+import org.hibernate.Length;
 import org.hibernate.LockMode;
 import org.hibernate.LockOptions;
 import org.hibernate.QueryTimeoutException;
@@ -298,7 +299,7 @@ public class SQLServerDialect extends AbstractTransactSQLDialect {
 		// this is essentially the only legal length for
 		// a "lob" in SQL Server, i.e. the value of MAX
 		// (caveat: for NVARCHAR it is half this value)
-		return Integer.MAX_VALUE;
+		return Length.LONG32;
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/SybaseASEDialect.java

@@ -11,6 +11,7 @@ import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Types;
 
+import org.hibernate.Length;
 import org.hibernate.LockMode;
 import org.hibernate.LockOptions;
 import org.hibernate.QueryTimeoutException;
@@ -176,7 +177,7 @@ public class SybaseASEDialect extends SybaseDialect {
 
 	@Override
 	public long getDefaultLobLength() {
-		return Integer.MAX_VALUE;
+		return Length.LONG32;
 	}
 
 	private static boolean isAnsiNull(DialectResolutionInfo info) {