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A general programming library in Java/Android. It's easy to learn and simple to use with concise and powerful APIs.
/*
* Copyright (C) 2015 HaiYang Li
*
* 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.landawn.abacus.type;
import java.io.IOException;
import java.io.Writer;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import com.landawn.abacus.parser.SerializationConfig;
import com.landawn.abacus.util.CharacterWriter;
import com.landawn.abacus.util.IOUtil;
import com.landawn.abacus.util.N;
import com.landawn.abacus.util.Numbers;
/**
*
* @author Haiyang Li
* @since 0.8
*/
public abstract class AbstractDoubleType extends NumberType {
protected AbstractDoubleType(String typeName) {
super(typeName);
}
/**
*
* @param x
* @return
*/
@Override
public String stringOf(Number x) {
if (x == null) {
return null;
}
return N.stringOf(x.toString());
}
/**
*
* @param str
* @return
*/
@Override
public Double valueOf(String str) {
try {
return N.isNullOrEmpty(str) ? ((Double) defaultValue()) : Double.valueOf(str);
} catch (NumberFormatException e) {
if (str.length() > 1) {
char ch = str.charAt(str.length() - 1);
if ((ch == 'l') || (ch == 'L') || (ch == 'f') || (ch == 'F') || (ch == 'd') || (ch == 'D')) {
return Double.valueOf(str.substring(0, str.length() - 1));
}
}
throw e;
}
}
/**
*
* @param rs
* @param columnIndex
* @return
* @throws SQLException the SQL exception
*/
@Override
public Double get(ResultSet rs, int columnIndex) throws SQLException {
return rs.getDouble(columnIndex);
}
/**
*
* @param rs
* @param columnLabel
* @return
* @throws SQLException the SQL exception
*/
@Override
public Double get(ResultSet rs, String columnLabel) throws SQLException {
return rs.getDouble(columnLabel);
}
/**
*
* @param stmt
* @param columnIndex
* @param x
* @throws SQLException the SQL exception
*/
@Override
public void set(PreparedStatement stmt, int columnIndex, Number x) throws SQLException {
if (x == null) {
stmt.setNull(columnIndex, Types.DOUBLE);
} else {
stmt.setDouble(columnIndex, x.doubleValue());
}
}
/**
*
* @param stmt
* @param parameterName
* @param x
* @throws SQLException the SQL exception
*/
@Override
public void set(CallableStatement stmt, String parameterName, Number x) throws SQLException {
if (x == null) {
stmt.setNull(parameterName, Types.DOUBLE);
} else {
stmt.setDouble(parameterName, x.doubleValue());
}
}
/**
*
* @param writer
* @param x
* @throws IOException Signals that an I/O exception has occurred.
*/
@Override
public void write(Writer writer, Number x) throws IOException {
if (x == null) {
writer.write(NULL_CHAR_ARRAY);
} else {
IOUtil.write(writer, x.doubleValue());
}
}
/**
*
* @param writer
* @param x
* @param config
* @throws IOException Signals that an I/O exception has occurred.
*/
@Override
public void writeCharacter(CharacterWriter writer, Number x, SerializationConfig config) throws IOException {
x = x == null && config != null && config.writeNullNumberAsZero() ? Numbers.DOUBLE_ZERO : x;
if (x == null) {
writer.write(NULL_CHAR_ARRAY);
} else {
writer.write(x.doubleValue());
}
}
}