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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.OptionalFloat;
/**
*
* @author Haiyang Li
* @since 0.8
*/
public class OptionalFloatType extends AbstractOptionalType {
public static final String OPTIONAL_FLOAT = OptionalFloat.class.getSimpleName();
protected OptionalFloatType() {
super(OPTIONAL_FLOAT);
}
/**
*
*
* @return
*/
@Override
public Class clazz() {
return OptionalFloat.class;
}
/**
* Checks if is comparable.
*
* @return true, if is comparable
*/
@Override
public boolean isComparable() {
return true;
}
/**
*
* @param x
* @return
*/
@Override
public String stringOf(OptionalFloat x) {
return x == null || x.isEmpty() ? null : String.valueOf(x.get());
}
/**
*
* @param str
* @return
*/
@Override
public OptionalFloat valueOf(String str) {
return N.isNullOrEmpty(str) ? OptionalFloat.empty() : OptionalFloat.of(Numbers.toFloat(str));
}
/**
*
* @param rs
* @param columnIndex
* @return
* @throws SQLException the SQL exception
*/
@Override
public OptionalFloat get(ResultSet rs, int columnIndex) throws SQLException {
final Object obj = rs.getObject(columnIndex);
return obj == null ? OptionalFloat.empty() : OptionalFloat.of(obj instanceof Float ? (Float) obj : Numbers.toFloat(obj));
}
/**
*
* @param rs
* @param columnLabel
* @return
* @throws SQLException the SQL exception
*/
@Override
public OptionalFloat get(ResultSet rs, String columnLabel) throws SQLException {
final Object obj = rs.getObject(columnLabel);
return obj == null ? OptionalFloat.empty() : OptionalFloat.of(obj instanceof Float ? (Float) obj : Numbers.toFloat(obj));
}
/**
*
* @param stmt
* @param columnIndex
* @param x
* @throws SQLException the SQL exception
*/
@Override
public void set(PreparedStatement stmt, int columnIndex, OptionalFloat x) throws SQLException {
if (x == null || x.isEmpty()) {
stmt.setNull(columnIndex, java.sql.Types.FLOAT);
} else {
stmt.setFloat(columnIndex, x.get());
}
}
/**
*
* @param stmt
* @param parameterName
* @param x
* @throws SQLException the SQL exception
*/
@Override
public void set(CallableStatement stmt, String parameterName, OptionalFloat x) throws SQLException {
if (x == null || x.isEmpty()) {
stmt.setNull(parameterName, java.sql.Types.FLOAT);
} else {
stmt.setFloat(parameterName, x.get());
}
}
/**
*
* @param writer
* @param x
* @throws IOException Signals that an I/O exception has occurred.
*/
@Override
public void write(Writer writer, OptionalFloat 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, OptionalFloat x, SerializationConfig config) throws IOException {
if (x == null) {
writer.write(NULL_CHAR_ARRAY);
} else {
writer.write(x.get());
}
}
}