Use single character for StringBuilder.append (#10102)

6 files changed, 9 insertions, 9 deletions

diff --git a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/RowItem.java b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/RowItem.java
index 9030202638..b7e6a4f38e 100644
--- a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/RowItem.java
+++ b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/RowItem.java
@@ -129,9 +129,9 @@ public final class RowItem implements Item {
         s.append("ID:");
         s.append(getId().toString());
         for (Object propId : getItemPropertyIds()) {
-            s.append("|");
+            s.append('|');
             s.append(propId.toString());
-            s.append(":");
+            s.append(':');
             Object value = getItemProperty(propId).getValue();
             s.append((null != value) ? value.toString() : null);
         }
diff --git a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/FreeformQuery.java b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/FreeformQuery.java
index 8c1282673e..bc5cfc56a3 100644
--- a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/FreeformQuery.java
+++ b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/FreeformQuery.java
@@ -471,7 +471,7 @@ public class FreeformQuery extends AbstractTransactionalQuery
             if (keys[ix] == null) {
                 where.append(" IS NULL");
             } else {
-                where.append(" = '").append(keys[ix]).append("'");
+                where.append(" = '").append(keys[ix]).append('\'');
             }
             if (ix < primaryKeyColumns.size() - 1) {
                 where.append(" AND ");
diff --git a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/TableQuery.java b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/TableQuery.java
index 065f16c029..b415c5ac51 100644
--- a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/TableQuery.java
+++ b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/TableQuery.java
@@ -439,10 +439,10 @@ public class TableQuery extends AbstractTransactionalQuery
         if (fullTableName == null) {
             StringBuilder sb = new StringBuilder();
             if (catalogName != null) {
-                sb.append(catalogName).append(".");
+                sb.append(catalogName).append('.');
             }
             if (schemaName != null) {
-                sb.append(schemaName).append(".");
+                sb.append(schemaName).append('.');
             }
             sb.append(tableName);
             fullTableName = sb.toString();
diff --git a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/DefaultSQLGenerator.java b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/DefaultSQLGenerator.java
index 2c8ff8b126..88fc18084c 100644
--- a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/DefaultSQLGenerator.java
+++ b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/DefaultSQLGenerator.java
@@ -213,12 +213,12 @@ public class DefaultSQLGenerator implements SQLGenerator {
             if (!first) {
                 query.append(", ");
             }
-            query.append("?");
+            query.append('?');
             sh.addParameterValue(columnToValueMap.get(column),
                     item.getItemProperty(column).getType());
             first = false;
         }
-        query.append(")");
+        query.append(')');
         sh.setQueryString(query.toString());
         return sh;
     }
diff --git a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/OracleGenerator.java b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/OracleGenerator.java
index bc7c659f07..34f93ec038 100644
--- a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/OracleGenerator.java
+++ b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/OracleGenerator.java
@@ -88,7 +88,7 @@ public class OracleGenerator extends DefaultSQLGenerator {
                 query.append(
                         QueryBuilder.getWhereStringForFilters(filters, sh));
             }
-            query.append(")");
+            query.append(')');
             sh.setQueryString(query.toString());
             return sh;
         }
diff --git a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/filter/QueryBuilder.java b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/filter/QueryBuilder.java
index b435757e8e..6bd65de0dc 100644
--- a/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/filter/QueryBuilder.java
+++ b/compatibility-server/src/main/java/com/vaadin/v7/data/util/sqlcontainer/query/generator/filter/QueryBuilder.java
@@ -94,7 +94,7 @@ public class QueryBuilder implements Serializable {
         StringBuilder result = new StringBuilder();
         for (Filter f : filters) {
             result.append(getWhereStringForFilter(f, sh));
-            result.append(" ").append(joinString).append(" ");
+            result.append(' ').append(joinString).append(' ');
         }
         // Remove the last instance of joinString
         result.delete(result.length() - joinString.length() - 2,