fix code

hutool-db/src/main/java/cn/hutool/db/meta/ResultColumn.java

@@ -0,0 +1,176 @@
+package cn.hutool.db.meta;
+
+import cn.hutool.db.DbRuntimeException;
+
+import java.sql.ResultSetMetaData;
+import java.sql.SQLException;
+
+/**
+ * {@link ResultSetMetaData}中某一列的元数据信息
+ *
+ * @author looly
+ */
+public class ResultColumn {
+
+	private final boolean autoIncrement;
+	private final boolean caseSensitive;
+	private final boolean searchable;
+	private final boolean currency;
+	private final int nullable;
+	private final boolean signed;
+	private final int displaySize;
+	private final String label;
+	private final String name;
+	private final String schemaName;
+	private final int precision;
+	private final int scale;
+	private final String tableName;
+	private final String catalogName;
+	private final int type;
+	private final String typeName;
+	private final boolean readOnly;
+	private final boolean writable;
+	private final boolean definitelyWritable;
+	private final String className;
+
+	/**
+	 * 构造
+	 *
+	 * @param metaData         {@link ResultSetMetaData}
+	 * @param columnIndexBase1 列序号，从1开始。即第一列为1，第二列为2。。。
+	 * @throws DbRuntimeException SQLException包装
+	 */
+	public ResultColumn(final ResultSetMetaData metaData, final int columnIndexBase1) throws DbRuntimeException {
+		try {
+			this.autoIncrement = metaData.isAutoIncrement(columnIndexBase1);
+			this.caseSensitive = metaData.isCaseSensitive(columnIndexBase1);
+			this.searchable = metaData.isSearchable(columnIndexBase1);
+			this.currency = metaData.isCurrency(columnIndexBase1);
+			this.nullable = metaData.isNullable(columnIndexBase1);
+			this.signed = metaData.isSigned(columnIndexBase1);
+			this.displaySize = metaData.getColumnDisplaySize(columnIndexBase1);
+			this.label = metaData.getColumnLabel(columnIndexBase1);
+			this.name = metaData.getColumnName(columnIndexBase1);
+			this.schemaName = metaData.getSchemaName(columnIndexBase1);
+			this.precision = metaData.getPrecision(columnIndexBase1);
+			this.scale = metaData.getScale(columnIndexBase1);
+			this.tableName = metaData.getTableName(columnIndexBase1);
+			this.catalogName = metaData.getCatalogName(columnIndexBase1);
+			this.type = metaData.getColumnType(columnIndexBase1);
+			this.typeName = metaData.getColumnTypeName(columnIndexBase1);
+			this.readOnly = metaData.isReadOnly(columnIndexBase1);
+			this.writable = metaData.isWritable(columnIndexBase1);
+			this.definitelyWritable = metaData.isDefinitelyWritable(columnIndexBase1);
+			this.className = metaData.getColumnClassName(columnIndexBase1);
+		} catch (final SQLException e) {
+			throw new DbRuntimeException(e);
+		}
+	}
+
+	public boolean isAutoIncrement() {
+		return autoIncrement;
+	}
+
+	public boolean isCaseSensitive() {
+		return caseSensitive;
+	}
+
+	public boolean isSearchable() {
+		return searchable;
+	}
+
+	public boolean isCurrency() {
+		return currency;
+	}
+
+	public int getNullable() {
+		return nullable;
+	}
+
+	public ColumnNullable getNullableEnum() {
+		return ColumnNullable.of(getNullable());
+	}
+
+	public boolean isSigned() {
+		return signed;
+	}
+
+	public int getDisplaySize() {
+		return displaySize;
+	}
+
+	public String getLabel() {
+		return label;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public String getSchemaName() {
+		return schemaName;
+	}
+
+	public int getPrecision() {
+		return precision;
+	}
+
+	public int getScale() {
+		return scale;
+	}
+
+	public String getTableName() {
+		return tableName;
+	}
+
+	public String getCatalogName() {
+		return catalogName;
+	}
+
+	public int getType() {
+		return type;
+	}
+
+	public String getTypeName() {
+		return typeName;
+	}
+
+	public boolean isReadOnly() {
+		return readOnly;
+	}
+
+	public boolean isWritable() {
+		return writable;
+	}
+
+	public boolean isDefinitelyWritable() {
+		return definitelyWritable;
+	}
+
+	public String getClassName() {
+		return className;
+	}
+
+	public static enum ColumnNullable {
+		NO_NULLS(ResultSetMetaData.columnNoNulls),
+		NULLABLE(ResultSetMetaData.columnNullable),
+		UNKNOWN(ResultSetMetaData.columnNullableUnknown);
+
+		final int value;
+
+		private ColumnNullable(final int value) {
+			this.value = value;
+		}
+
+		public static ColumnNullable of(final int nullable) {
+			switch (nullable) {
+				case ResultSetMetaData.columnNoNulls:
+					return NO_NULLS;
+				case ResultSetMetaData.columnNullable:
+					return NULLABLE;
+				default:
+					return UNKNOWN;
+			}
+		}
+	}
+}