56 lines
1.6 KiB
Java
56 lines
1.6 KiB
Java
package net.minecraft.util;
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import com.google.common.collect.Lists;
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import java.io.IOException;
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import java.io.Writer;
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import java.util.List;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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import org.apache.commons.lang3.StringEscapeUtils;
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import org.jetbrains.annotations.Nullable;
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public class CsvOutput {
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private static final String LINE_SEPARATOR = "\r\n";
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private static final String FIELD_SEPARATOR = ",";
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private final Writer output;
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private final int columnCount;
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CsvOutput(Writer output, List<String> firstRow) throws IOException {
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this.output = output;
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this.columnCount = firstRow.size();
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this.writeLine(firstRow.stream());
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}
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public static CsvOutput.Builder builder() {
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return new CsvOutput.Builder();
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}
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public void writeRow(Object... data) throws IOException {
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if (data.length != this.columnCount) {
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throw new IllegalArgumentException("Invalid number of columns, expected " + this.columnCount + ", but got " + data.length);
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} else {
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this.writeLine(Stream.of(data));
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}
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}
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private void writeLine(Stream<?> data) throws IOException {
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this.output.write((String)data.map(CsvOutput::getStringValue).collect(Collectors.joining(",")) + "\r\n");
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}
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private static String getStringValue(@Nullable Object value) {
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return StringEscapeUtils.escapeCsv(value != null ? value.toString() : "[null]");
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}
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public static class Builder {
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private final List<String> headers = Lists.<String>newArrayList();
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public CsvOutput.Builder addColumn(String header) {
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this.headers.add(header);
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return this;
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}
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public CsvOutput build(Writer output) throws IOException {
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return new CsvOutput(output, this.headers);
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}
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}
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}
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