com.viaoa.datasource.jdbc.delegate.ConverterDelegate Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of oa-core Show documentation
Object Automation library
The newest version!
/*  Copyright 1999 Vince Via [email protected]
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/
package com.viaoa.datasource.jdbc.delegate;

import java.math.BigDecimal;
import java.sql.Types;
import java.util.List;
import java.util.StringTokenizer;

import com.viaoa.datasource.jdbc.db.Column;
import com.viaoa.datasource.jdbc.db.DBMetaData;
import com.viaoa.object.OAObject;
import com.viaoa.object.OAObjectKey;
import com.viaoa.util.OAConverter;
import com.viaoa.util.OADate;
import com.viaoa.util.OADateTime;
import com.viaoa.util.OAReflect;
import com.viaoa.util.OAString;
import com.viaoa.util.OATime;

/**
 * Used to convert query data into correct SQL data type.
 *
 * @author vvia
 */
public class ConverterDelegate {

	public static String convert(DBMetaData dbmd, Column column, Object value) {
		Class clazz = null;

		if (column == null) {
			if (value == null) {
				return "NULL";
			}

			if (value instanceof List) {
				// 20220101 list of oaObjectKey used by IN
				String str = "";
				for (Object objx : ((List) value)) {
					if (objx instanceof OAObjectKey) {
						Object[] ids = ((OAObjectKey) objx).getObjectIds();
						String s = "";
						for (Object objz : ids) {
							if (s.length() > 0) {
								s += ", ";
							}
							if (objz == null) {
								s += "null";
							} else {
								s += convertToString(dbmd, objz, true, 0, 0, null);
							}
						}

						if (ids != null && ids.length > 1) {
							s = "(" + s + ")";
						}
						if (str.length() > 0) {
							str += ", ";
						}
						str += s;
					} else {
						if (str.length() > 0) {
							str += ", ";
						}
						String s = convertToString(dbmd, objx, true, 0, 0, null);
						str += s;

					}
				}
				return str;
			}

			return value.toString();
		}

		if (value instanceof OAObject) {
			value = ((OAObject) value).getObjectKey();
		}
		if (value instanceof OAObjectKey) {
			String str = "";
			Object[] ids = ((OAObjectKey) value).getObjectIds();
			String s = "";
			for (Object objz : ids) {
				if (s.length() > 0) {
					s += ", ";
				}
				if (objz == null) {
					s += "null";
				} else {
					s += convertToString(dbmd, objz, true, 0, 0, null);
				}
			}

			if (ids != null && ids.length > 1) {
				s = "(" + s + ")";
			}
			if (str.length() > 0) {
				str += ", ";
			}
			str += s;
			return str;
		}

		switch (column.type) {
		case Types.CLOB:
		case Types.LONGVARCHAR:
		case Types.VARCHAR:
			clazz = String.class;
			if (dbmd.blanksAsNulls && ((value instanceof String) && ((String) value).length() == 0)) {
				value = null;
			}
			break;

		case Types.BIGINT:
		case Types.DECIMAL:
		case Types.FLOAT:
		case Types.INTEGER:
		case Types.NUMERIC:
		case Types.REAL:
		case Types.SMALLINT:
		case Types.DOUBLE:
		case Types.TINYINT:
			clazz = Number.class;
			break;

		case Types.CHAR:
			clazz = Character.class;
			break;

		case Types.BIT:
		case Types.BOOLEAN:
			clazz = Boolean.class;
			break;

		case Types.DATE:
			clazz = OADate.class;
			break;
		case Types.TIME:
			clazz = OATime.class;
			break;
		case Types.TIMESTAMP:
			clazz = OADateTime.class;
			// 20170206 removed for sqlserver, that now has a DateTime
			// if (dbmd.databaseType == dbmd.SQLSERVER) clazz = Number.class;
			break;

		case Types.LONGVARBINARY:
		case Types.VARBINARY:
			// todo: qqq these are for byte[]
			// throw new RuntimeException("SQL Type not mapped to a class");
		default:
			// throw new RuntimeException("SQL Type not known");
		}

		if (clazz != null && value != null) {
			value = OAConverter.convert(clazz, value);
		}

		return convertToString(dbmd, value, true, column.maxLength, column.decimalPlaces, column);
	}

	public static boolean areSingleQuotesNeeded(Column column) {
		switch (column.type) {
		case Types.CLOB:
		case Types.LONGVARCHAR:
		case Types.VARCHAR:
			return true;
		}
		return false;
	}

	protected static String convertToString(DBMetaData dbmd, Object obj, boolean bConvertSingleQuotes, int maxLength, int decimalPlaces,
			Column column) {
		if (obj == null) {
			return "NULL";
		}
		Class c = obj.getClass();

		if (c.equals(Boolean.class)) {
			boolean b = ((Boolean) obj).booleanValue();
			if (dbmd.objectTrue != null) {
				obj = b ? dbmd.objectTrue : dbmd.objectFalse;
			} else {
				return (b ? "1" : "0");
			}
			return obj.toString();
		}

		if (Number.class.isAssignableFrom(c)) {
			String fmt = null;
			if (decimalPlaces > 0) {
				if (obj instanceof BigDecimal) {
					if (decimalPlaces <= 0 || ((BigDecimal) obj).scale() <= decimalPlaces) {
						return ((BigDecimal) obj).toPlainString();
					}
				}
				if (OAReflect.isFloat(c)) {
					fmt = ".0";
					for (int i = 1; i < decimalPlaces; i++) {
						fmt += "0";
					}
				}
			}
			return OAConverter.toString(obj, fmt);
		}

		if (c.equals(OADate.class)) {
			String s = ((OADate) obj).toString("yyyy-MM-dd");
			if (dbmd.databaseType == dbmd.ACCESS) {
				return "#" + s + "#";
			}
			return "{d '" + s + "'}";
		}

		if (c.equals(OATime.class)) {
			OATime time = (OATime) obj;
			String s = OAString.fmt("" + time.getHour(), "2R00") + ":" + OAString.fmt("" + time.getMinute(), "2R00") + ":"
					+ OAString.fmt("" + time.getSecond(), "2R00");
			if (dbmd.databaseType == dbmd.ACCESS) {
				return "#" + s + "#";
			}
			return "{t '" + s + "'}";
		}

		if (c.equals(OADateTime.class)) {
			String s = ((OADateTime) obj).toString("yyyy-MM-dd HH:mm:ss");
			if (dbmd.databaseType == dbmd.ACCESS) {
				return "#" + s + "#";
			}
			return "{ts '" + s + "'}";
		}

		String s = OAConverter.toString(obj);

		if (maxLength > 0 && s.length() > maxLength) {
			s = s.substring(0, maxLength);
		}

		if (bConvertSingleQuotes) {
			s = convertSingleQuotes(dbmd, s);
			s = "'" + s + "'";
			if (column != null && column.unicode) {
				s = "N" + s;
			}
		}
		return s;
	}

	protected static String convertSingleQuotes(DBMetaData dbmd, String value) {
		if (value == null) {
			return null;
		}
		// convert all ' to ''
		if (value.indexOf('\'') >= 0 || value.indexOf('\\') >= 0) {
			StringTokenizer st = new StringTokenizer(value, "'\\", true);
			StringBuffer newValue = new StringBuffer(value.length() + 16);
			while (st.hasMoreTokens()) {
				String s = st.nextToken();
				if (s.charAt(0) == '\'') {
					if (dbmd.useBackslashForEscape) {
						newValue.append("\\'");
					} else {
						newValue.append("''");
					}
				} else if (s.charAt(0) == '\\' && dbmd.useBackslashForEscape) {
					newValue.append("\\");
				} else {
					newValue.append(s);
				}
			}
			value = new String(newValue);
		}
		return value;
	}
}