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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) 2016, Haiyang Li. All rights reserved.
*/
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 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;
import com.landawn.abacus.util.u.OptionalDouble;
/**
*
* @author Haiyang Li
* @since 0.8
*/
public class OptionalDoubleType extends AbstractOptionalType {
public static final String OPTIONAL_DOUBLE = OptionalDouble.class.getSimpleName();
protected OptionalDoubleType() {
super(OPTIONAL_DOUBLE);
}
/**
*
*
* @return
*/
@Override
public Class clazz() {
return OptionalDouble.class;
}
/**
* Checks if is comparable.
*
* @return true, if is comparable
*/
@Override
public boolean isComparable() {
return true;
}
/**
*
* @param x
* @return
*/
@Override
public String stringOf(OptionalDouble x) {
return x == null || x.isEmpty() ? null : String.valueOf(x.get());
}
/**
*
* @param str
* @return
*/
@Override
public OptionalDouble valueOf(String str) {
return N.isNullOrEmpty(str) ? OptionalDouble.empty() : OptionalDouble.of(Numbers.toDouble(str));
}
/**
*
* @param rs
* @param columnIndex
* @return
* @throws SQLException the SQL exception
*/
@Override
public OptionalDouble get(ResultSet rs, int columnIndex) throws SQLException {
final Object obj = rs.getObject(columnIndex);
return obj == null ? OptionalDouble.empty() : OptionalDouble.of(obj instanceof Double ? (Double) obj : Numbers.toDouble(obj));
}
/**
*
* @param rs
* @param columnLabel
* @return
* @throws SQLException the SQL exception
*/
@Override
public OptionalDouble get(ResultSet rs, String columnLabel) throws SQLException {
final Object obj = rs.getObject(columnLabel);
return obj == null ? OptionalDouble.empty() : OptionalDouble.of(obj instanceof Double ? (Double) obj : Numbers.toDouble(obj));
}
/**
*
* @param stmt
* @param columnIndex
* @param x
* @throws SQLException the SQL exception
*/
@Override
public void set(PreparedStatement stmt, int columnIndex, OptionalDouble x) throws SQLException {
if (x == null || x.isEmpty()) {
stmt.setNull(columnIndex, java.sql.Types.DOUBLE);
} else {
stmt.setDouble(columnIndex, x.get());
}
}
/**
*
* @param stmt
* @param parameterName
* @param x
* @throws SQLException the SQL exception
*/
@Override
public void set(CallableStatement stmt, String parameterName, OptionalDouble x) throws SQLException {
if (x == null || x.isEmpty()) {
stmt.setNull(parameterName, java.sql.Types.DOUBLE);
} else {
stmt.setDouble(parameterName, x.get());
}
}
/**
*
* @param writer
* @param x
* @throws IOException Signals that an I/O exception has occurred.
*/
@Override
public void write(Writer writer, OptionalDouble x) throws IOException {
if (x == null) {
writer.write(NULL_CHAR_ARRAY);
} else {
IOUtil.write(writer, x.get());
}
}
/**
*
* @param writer
* @param x
* @param config
* @throws IOException Signals that an I/O exception has occurred.
*/
@Override
public void writeCharacter(CharacterWriter writer, OptionalDouble x, SerializationConfig config) throws IOException {
if (x == null) {
writer.write(NULL_CHAR_ARRAY);
} else {
writer.write(x.get());
}
}
}