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Commit 84d7e5ca authored by Christopher Bohn's avatar Christopher Bohn :thinking:
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CsvFile (née CSVReaderWriter) now instantiable class, not utility class

parent 623a8304
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pom.xml
+ 1
− 1
View file @ 84d7e5ca
......@@ -31,7 +31,7 @@
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>edu.unl.cse.csv_io.CSVReaderWriter</mainClass>
<mainClass>edu.unl.cse.csv_io.CsvFile</mainClass>
</manifest>
</archive>
</configuration>
......
src/main/java/edu/unl/cse/csv_io/AbstractFormattedFile.java 0 → 100644
+ 29
− 0
View file @ 84d7e5ca
package edu.unl.cse.csv_io;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Set;
public abstract class AbstractFormattedFile implements FormattedFile {
protected final String filename;
private Set<String> fields;
protected AbstractFormattedFile(String filename) {
this.filename = filename;
fields = new LinkedHashSet<>();
}
public Set<String> getFields() {
return Collections.unmodifiableSet(fields);
}
@SuppressWarnings("unused")
protected boolean addField(String fieldName) {
return fields.add(fieldName);
}
@SuppressWarnings("UnusedReturnValue")
protected boolean addAllFields(Set<String> possiblyNewFields) {
return fields.addAll(possiblyNewFields);
}
}
src/main/java/edu/unl/cse/csv_io/CSVReaderWriter.java → src/main/java/edu/unl/cse/csv_io/CsvFile.java
+ 17
− 48
View file @ 84d7e5ca
......@@ -14,27 +14,20 @@ import java.net.URL;
import java.util.*;
@SuppressWarnings("unused")
public class CSVReaderWriter {
@SuppressWarnings("WeakerAccess")
public static Set<Map<String, String>> readCSVasSet(String filename) {
Set<Map<String, String>> csvSet = null;
try (InputStreamReader inputStreamReader = new InputStreamReader(Objects.requireNonNull(
CSVReaderWriter.class.getClassLoader().getResourceAsStream("csv/" + filename)))) {
csvSet = (Set<Map<String, String>>) parseCSV(inputStreamReader, new HashSet<>());
} catch (NullPointerException nullPointerException) {
System.err.println("Check spelling of file " + filename + ".");
} catch (IOException ioException) {
System.err.println("Error loading " + filename + ". " + ioException);
}
return csvSet;
public class CsvFile extends AbstractFormattedFile implements FormattedFile {
CsvFile(String filename) {
super("csv/" + filename + ".csv");
}
public static List<Map<String, String>> readCSVasList(String filename) {
@Override
public Collection<Map<String, String>> readFile() {
List<Map<String, String>> csvList = null;
try (InputStreamReader inputStreamReader = new InputStreamReader(Objects.requireNonNull(
CSVReaderWriter.class.getClassLoader().getResourceAsStream("csv/" + filename)))) {
CsvFile.class.getClassLoader().getResourceAsStream(filename)))) {
csvList = (List<Map<String, String>>) parseCSV(inputStreamReader, new LinkedList<>());
for(Map<String,String> row:csvList) {
addAllFields(row.keySet());
}
} catch (NullPointerException nullPointerException) {
System.err.println("Check spelling of file " + filename + ".");
} catch (IOException ioException) {
......@@ -43,8 +36,7 @@ public class CSVReaderWriter {
return csvList;
}
private static Collection<Map<String, String>> parseCSV(Reader reader,
Collection<Map<String, String>> destination) {
Collection<Map<String, String>> parseCSV(Reader reader, Collection<Map<String, String>> destination) {
Map<String, String> line;
try {
CSVReaderHeaderAware csvReader = new CSVReaderHeaderAwareBuilder(reader).build();
......@@ -61,9 +53,10 @@ public class CSVReaderWriter {
return destination;
}
public static boolean writeCSV(String filename, Collection<Map<String, String>> data) {
@Override
public boolean writeFile(Collection<Map<String, String>> data) {
boolean wroteFile = true;
ClassLoader classLoader = CSVReaderWriter.class.getClassLoader();
ClassLoader classLoader = CsvFile.class.getClassLoader();
URL resource = classLoader.getResource("csv/" + filename);
if (resource == null) {
try {
......@@ -94,7 +87,7 @@ public class CSVReaderWriter {
return wroteFile;
}
static void placeCSVonWriter(Collection<Map<String, String>> data, Writer writer) {
void placeCSVonWriter(Collection<Map<String, String>> data, Writer writer) {
CSVWriter csvWriter = new CSVWriter(writer);
List<String[]> allLines = new LinkedList<>();
String[] fieldNames = getFieldNames(data);
......@@ -112,12 +105,11 @@ public class CSVReaderWriter {
csvWriter.writeAll(allLines, false);
}
private static String[] getFieldNames(Collection<Map<String, String>> data) {
Set<String> fieldNames = new HashSet<>();
private String[] getFieldNames(Collection<Map<String, String>> data) {
for (Map<String, String> row : data) {
fieldNames.addAll(row.keySet());
addAllFields(row.keySet());
}
List<String> fieldList = new ArrayList<>(fieldNames);
List<String> fieldList = new ArrayList<>(getFields());
String[] fieldArray = new String[fieldList.size()];
fieldArray = fieldList.toArray(fieldArray);
return fieldArray;
......@@ -176,27 +168,4 @@ public class CSVReaderWriter {
collection.addAll(preliminaryCollection);
return collection;
}
/* LEGACY METHODS */
public static Set<Map<String, String>> readCSV(String filename) {
return readCSVasSet(filename);
}
static Set<Map<String, String>> parseCSV(InputStream inputStream) {
return (Set<Map<String, String>>) parseCSV(new InputStreamReader(inputStream), new HashSet<>());
}
static void placeCSVonStream(Collection<Map<String, String>> data, OutputStream outputStream) throws IOException {
OutputStreamWriter writer = new OutputStreamWriter(outputStream);
placeCSVonWriter(data, writer);
writer.close();
}
/*
public static void main(String[] args) {
Set<Map<String, String>> demo = readCSV("demo.csv");
boolean success = writeCSV("out.csv", demo);
System.out.println(success ? "Wrote file!" : "Didn't write file");
}
*/
}
src/main/java/edu/unl/cse/csv_io/FormattedFile.java 0 → 100644
+ 13
− 0
View file @ 84d7e5ca
package edu.unl.cse.csv_io;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
@SuppressWarnings("unused")
public interface FormattedFile {
// TODO: change from Map<String,String> to Map<String,Object>, where Object is constrained to String, Long, Boolean, or List<String>
Collection<Map<String, String>> readFile();
boolean writeFile(Collection<Map<String, String>> data);
Set<String> getFields();
}
src/test/java/edu/unl/cse/csv_io/CSVReaderWriterTest.java → src/test/java/edu/unl/cse/csv_io/CsvFileTest.java
+ 28
− 25
View file @ 84d7e5ca
......@@ -11,14 +11,15 @@ import static org.junit.Assert.*;
import static org.hamcrest.CoreMatchers.*;
@SuppressWarnings("unchecked") // pee-yew!
public class CSVReaderWriterTest {
private static InputStream inputStream;
public class CsvFileTest {
private static OutputStream outputStream;
private static Reader reader;
private static Writer writer;
private CsvFile csvFile;
private static void placeCSVStringOnInputStream(String[][] data) {
String CSVString = createCSVString(data);
inputStream = new ByteArrayInputStream(CSVString.getBytes());
reader = new InputStreamReader(new ByteArrayInputStream(CSVString.getBytes()));
}
private static String createCSVString(String[][] data) {
......@@ -37,6 +38,7 @@ public class CSVReaderWriterTest {
public void setUp() {
outputStream = new ByteArrayOutputStream();
writer = new OutputStreamWriter(outputStream);
csvFile = new CsvFile("");
}
@After
......@@ -53,8 +55,8 @@ public class CSVReaderWriterTest {
String[][] data = {headers, row};
// Output
placeCSVStringOnInputStream(data);
Set<Map<String, String>> result;
result = CSVReaderWriter.parseCSV(inputStream);
Collection<Map<String, String>> result;
result = csvFile.parseCSV(reader, new HashSet<>());
// Oracle -- Header
Set<String> expectedKeys = new HashSet<>(Arrays.asList(headers));
// Oracle -- Rows
......@@ -77,8 +79,8 @@ public class CSVReaderWriterTest {
String[][] data = {headers, rows[0], rows[1]};
// Output
placeCSVStringOnInputStream(data);
Set<Map<String, String>> result;
result = CSVReaderWriter.parseCSV(inputStream);
Collection<Map<String, String>> result;
result = csvFile.parseCSV(reader, new HashSet<>());
// Oracle -- Header
Set<String> expectedKeys = new HashSet<>(Arrays.asList(headers));
// Oracle -- Rows
......@@ -105,8 +107,8 @@ public class CSVReaderWriterTest {
String[][] data = {headers};
// Output
placeCSVStringOnInputStream(data);
Set<Map<String, String>> result;
result = CSVReaderWriter.parseCSV(inputStream);
Collection<Map<String, String>> result;
result = csvFile.parseCSV(reader, new HashSet<>());
// Oracle
int expectedResultSize = 0;
// Compare
......@@ -120,8 +122,8 @@ public class CSVReaderWriterTest {
String[][] data = {};
// Output
placeCSVStringOnInputStream(data);
Set<Map<String, String>> result;
result = CSVReaderWriter.parseCSV(inputStream);
Collection<Map<String, String>> result;
result = csvFile.parseCSV(reader, new HashSet<>());
// Oracle
int expectedResultSize = 0;
// Compare
......@@ -137,8 +139,8 @@ public class CSVReaderWriterTest {
String[][] data = {headers, rows[0], rows[1], rows[2]};
// Output
placeCSVStringOnInputStream(data);
Set<Map<String, String>> result;
result = CSVReaderWriter.parseCSV(inputStream);
Collection<Map<String, String>> result;
result = csvFile.parseCSV(reader, new HashSet<>());
// Oracle -- Header
Set<String> expectedKeys = new HashSet<>(Arrays.asList(headers));
// Oracle -- Rows
......@@ -181,7 +183,8 @@ public class CSVReaderWriterTest {
Collections.reverse(Arrays.asList(rows[1]));
String expectedCSVStringOption2 = createCSVString(data);
// Output
CSVReaderWriter.placeCSVonStream(input, outputStream);
csvFile.placeCSVonWriter(input, writer);
writer.flush();
String output = outputStream.toString();
// Compare
assertTrue(expectedCSVStringOption1.equals(output) || expectedCSVStringOption2.equals(output));
......@@ -210,7 +213,7 @@ public class CSVReaderWriterTest {
Collections.reverse(Arrays.asList(formattedRow2));
String expectedCSVStringOption2 = createCSVString(data);
// Output
CSVReaderWriter.placeCSVonWriter(input, writer);
csvFile.placeCSVonWriter(input, writer);
writer.flush();
String output = outputStream.toString();
// Compare
......@@ -226,7 +229,7 @@ public class CSVReaderWriterTest {
// Oracle
String expectedOutput = "foo bar \"baz plugh\"";
// Output
String actualOutput = CSVReaderWriter.createDelimitedCollection(inputList, " ");
String actualOutput = CsvFile.createDelimitedCollection(inputList, " ");
// Compare
assertEquals(expectedOutput, actualOutput);
}
......@@ -239,7 +242,7 @@ public class CSVReaderWriterTest {
// Oracle
String expectedOutput = "foo";
// Output
String actualOutput = CSVReaderWriter.createDelimitedCollection(input, " ");
String actualOutput = CsvFile.createDelimitedCollection(input, " ");
// Compare
assertEquals(expectedOutput, actualOutput);
}
......@@ -251,7 +254,7 @@ public class CSVReaderWriterTest {
// Oracle
String expectedOutput = "";
// Output
String actualOutput = CSVReaderWriter.createDelimitedCollection(input, " ");
String actualOutput = CsvFile.createDelimitedCollection(input, " ");
// Compare
assertEquals(expectedOutput, actualOutput);
}
......@@ -264,7 +267,7 @@ public class CSVReaderWriterTest {
String[] expectedOutputArray = {"one", "two", "three", "four"};
Collection<String> expectedOutput = Arrays.asList(expectedOutputArray);
// Output
Collection<String> actualOutput = CSVReaderWriter.createFreeCollection(input, " ", new ArrayList<>());
Collection<String> actualOutput = CsvFile.createFreeCollection(input, " ", new ArrayList<>());
// Compare
assertEquals(expectedOutput, actualOutput);
}
......@@ -277,7 +280,7 @@ public class CSVReaderWriterTest {
String[] expectedOutputArray = {"one"};
Collection<String> expectedOutput = Arrays.asList(expectedOutputArray);
// Output
Collection<String> actualOutput = CSVReaderWriter.createFreeCollection(input, " ", new ArrayList<>());
Collection<String> actualOutput = CsvFile.createFreeCollection(input, " ", new ArrayList<>());
// Compare
assertEquals(expectedOutput, actualOutput);
}
......@@ -289,7 +292,7 @@ public class CSVReaderWriterTest {
// Oracle
Collection<String> expectedOutput = new ArrayList<>();
// Output
Collection<String> actualOutput = CSVReaderWriter.createFreeCollection(input, " ", new ArrayList<>());
Collection<String> actualOutput = CsvFile.createFreeCollection(input, " ", new ArrayList<>());
// Compare
assertEquals(expectedOutput, actualOutput);
assertNotNull(actualOutput);
......@@ -303,7 +306,7 @@ public class CSVReaderWriterTest {
// Oracle
Collection<String> expectedOutput = new ArrayList<>();
// Output
Collection<String> actualOutput = CSVReaderWriter.createFreeCollection(input, " ", new ArrayList<>());
Collection<String> actualOutput = CsvFile.createFreeCollection(input, " ", new ArrayList<>());
// Compare
assertEquals(expectedOutput, actualOutput);
assertNotNull(actualOutput);
......@@ -318,7 +321,7 @@ public class CSVReaderWriterTest {
String[] expectedOutputArray = {"one", "two", "three", "four", "five", "six"};
Collection<String> expectedOutput = Arrays.asList(expectedOutputArray);
// Output
Collection<String> actualOutput = CSVReaderWriter.createFreeCollection(input, " ", new ArrayList<>());
Collection<String> actualOutput = CsvFile.createFreeCollection(input, " ", new ArrayList<>());
// Compare
assertEquals(expectedOutput, actualOutput);
}
......@@ -331,7 +334,7 @@ public class CSVReaderWriterTest {
String[] expectedOutputArray = {"one", "two three", "four five", "six"};
Collection<String> expectedOutput = Arrays.asList(expectedOutputArray);
// Output
Collection<String> actualOutput = CSVReaderWriter.createFreeCollection(input, " ", new ArrayList<>());
Collection<String> actualOutput = CsvFile.createFreeCollection(input, " ", new ArrayList<>());
// Compare
assertEquals(expectedOutput, actualOutput);
}
......@@ -344,7 +347,7 @@ public class CSVReaderWriterTest {
String[] expectedOutputArray = {"one", "two", "three\"", "four", "five", "six"};
Collection<String> expectedOutput = Arrays.asList(expectedOutputArray);
// Output
Collection<String> actualOutput = CSVReaderWriter.createFreeCollection(input, " ", new ArrayList<>());
Collection<String> actualOutput = CsvFile.createFreeCollection(input, " ", new ArrayList<>());
// Compare
assertEquals(expectedOutput, actualOutput);
}
......
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