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com.tsc9526.monalisa.orm.tools.csv.Csv Maven / Gradle / Ivy
package com.tsc9526.monalisa.orm.tools.csv;
import java.io.IOException;
import java.io.InputStream;
import java.io.LineNumberReader;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.StringReader;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.relique.io.DataReader;
import org.relique.jdbc.csv.CsvRawReader;
import org.relique.jdbc.csv.SqlParser;
import com.tsc9526.monalisa.orm.datatable.CsvOptions;
import com.tsc9526.monalisa.orm.datatable.DataColumn;
import com.tsc9526.monalisa.orm.datatable.DataMap;
import com.tsc9526.monalisa.orm.datatable.DataTable;
import com.tsc9526.monalisa.orm.tools.helper.ClassHelper;
import com.tsc9526.monalisa.orm.tools.helper.ClassHelper.FGS;
import com.tsc9526.monalisa.orm.tools.helper.ClassHelper.MetaClass;
import com.tsc9526.monalisa.orm.tools.helper.FileHelper;
public class Csv {
public DataTable fromCsv (InputStream csvInputStream,CsvOptions options ) {
String csvString=FileHelper.readToString(csvInputStream, options.getCharset());
return fromCsv(csvString, options);
}
public DataTable fromCsv (String csvString,CsvOptions options ) {
try {
DataTable table=new DataTable();
CsvRawReader reader = loadCsvRawReader(csvString, options);
String[] columns=reader.getColumnNames();
table.setHeaders(columns);
while (reader.next()){
String[] vs=reader.getFieldValues();
DataMap m=new DataMap();
for (int i=0 ;i table, OutputStream outputStream, CsvOptions options){
PrintStream out =null ;
try {
out =new PrintStream(outputStream,true ,options.getCharset());
String separator = options.getSeparator();
Character quoteChar = options.getQuotechar();
String quoteStyle = options.getQuoteStyle();
boolean writeHeaderLine = !options.isSuppressHeaders();
List headers = table.getHeaders();
int columnCount = headers.size();
if (writeHeaderLine) {
for (int i = 0 ; i < columnCount; i++) {
if (i > 0 ) {
out .print(separator);
}
out .print(headers.get (i).getName());
}
out .println();
}
for (Object row:table){
Object[] vs=new Object[headers.size()];
int i=0 ;
if (row instanceof Map){
Map map=(Map)row;
for (DataColumn column:headers){
vs[i++]=map.get (column.getName());
}
}else {
if (row.getClass().isPrimitive() || row.getClass().getName().startsWith("java." )){
vs[i++]=row;
}else {
MetaClass mc=ClassHelper.getMetaClass(row.getClass());
for (DataColumn column:headers){
FGS fgs=mc.getField(column.getName());
Object v=null ;
if (fgs!=null ){
v=fgs.getObject(row);
}
vs[i++]=v;
}
}
}
for (int k= 0 ; k < vs.length; k++) {
if (k > 0 ) {
out .print(separator);
}
String value = ClassHelper.converter.convert(vs[k],String.class);
if (value != null ) {
if (quoteChar != null ) {
value = addQuotes(value , separator, quoteChar.charValue(), quoteStyle);
}
out .print(value );
}
}
out .println();
}
out .flush();
}catch (IOException e){
throw new RuntimeException(e);
}finally {
if (out !=null )out .close();
}
}
public DataTable queryTable (DataTabletable,String sql ) {
SqlParser parser = new SqlParser();
try {
parser.parse(sql);
ResultSet rs = new DataTableResultSet(
createDataReader(table),
"_THIS_TABLE" ,ResultSet.TYPE_SCROLL_INSENSITIVE,
parser);
DataTable rtable=new DataTable();
while (rs.next()){
DataMap row=new DataMap();
loadToMap(rs,row);
rtable.add (row);
}
rs.close();
return rtable;
}catch (Exception e){
throw new RuntimeException("SQL exception: " + sql+"\r\nHeaders: \r\n" +table.getHeaders(),e);
}
}
protected DataMap loadToMap (ResultSet rs, DataMap map ) throws SQLException xs = new HashMap();
for (int i = 1 ; i <= rsmd.getColumnCount(); i++) {
String name = rsmd.getColumnLabel(i);
if (name == null || name.trim().length() < 1 ) {
name = rsmd.getColumnName(i);
}
name = name.toLowerCase();
Integer n = xs.get (name);
if (n != null ) {
map.put(name + n, rs.getObject(i));
xs.put(name, n + 1 );
} else {
xs.put(name, 1 );
map.put(name, rs.getObject(i));
}
}
return map;
}
private String addQuotes (String value , String separator, char quoteChar, String quoteStyle ) if ("C" .equals (quoteStyle)) {
value = value .replace("\\" , "\\\\" );
value = value .replace("" + quoteChar, "\\" + quoteChar);
} else {
value = value .replace("" + quoteChar, "" + quoteChar + quoteChar);
}
if (value .indexOf(separator) >= 0 || value .indexOf(quoteChar) >= 0 || value .indexOf('\r' ) >= 0 || value .indexOf('\n' ) >= 0 ) {
value = quoteChar + value + quoteChar;
}
return value ;
}
public CsvRawReader loadCsvRawReader (String csvString, CsvOptions options ) try {
LineNumberReader input = new LineNumberReader(new StringReader(csvString));
CsvRawReader reader = new CsvRawReader(
input,
null ,
null ,
options.getSeparator(),
options.isSuppressHeaders(),
options.isHeaderFixedWidth(),
options.getQuotechar(),
options.getCommentChar(),
options.getHeaderLine(),
options.isTrimHeaders(),
options.isTrimValues(),
options.getSkipLeadingLines(),
options.isIgnoreUnparseableLines(),
options.getMissingValue(),
options.isDefectiveHeaders(),
options.getSkipLeadingDataLines(),
options.getQuoteStyle(),
options.getFixedWidthColumns());
return reader;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public DataReader createDataReader (DataTable table )return new DataTableReader(table);
}
}
