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Table.java
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102 lines (74 loc) · 2.69 KB
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package technology.tabula;
import java.util.ArrayList;
import java.util.List;
import java.util.TreeMap;
import technology.tabula.extractors.ExtractionAlgorithm;
@SuppressWarnings("serial")
public class Table extends Rectangle {
public static final Table empty() { return new Table(""); }
private Table(String extractionMethod) {
this.extractionMethod = extractionMethod;
}
public Table(ExtractionAlgorithm extractionAlgorithm) {
this(extractionAlgorithm.toString());
}
private final String extractionMethod;
private int rowCount = 0;
private int colCount = 0;
/* visible for testing */ final TreeMap<CellPosition, RectangularTextContainer> cells = new TreeMap<>();
public int getRowCount() { return rowCount; }
public int getColCount() { return colCount; }
public String getExtractionMethod() { return extractionMethod; }
public void add(RectangularTextContainer chunk, int row, int col) {
this.merge(chunk);
rowCount = Math.max(rowCount, row + 1);
colCount = Math.max(colCount, col + 1);
CellPosition cp = new CellPosition(row, col);
RectangularTextContainer old = cells.get(cp);
if (old != null) chunk.merge(old);
cells.put(cp, chunk);
this.memoizedRows = null;
}
private List<List<RectangularTextContainer>> memoizedRows = null;
public List<List<RectangularTextContainer>> getRows() {
if (this.memoizedRows == null) this.memoizedRows = computeRows();
return this.memoizedRows;
}
private List<List<RectangularTextContainer>> computeRows() {
List<List<RectangularTextContainer>> rows = new ArrayList<>();
for (int i = 0; i < rowCount; i++) {
List<RectangularTextContainer> lastRow = new ArrayList<>();
rows.add(lastRow);
for (int j = 0; j < colCount; j++) {
RectangularTextContainer cell = cells.get(new CellPosition(i,j)); // JAVA_8 use getOrDefault()
lastRow.add(cell != null ? cell : TextChunk.EMPTY);
}
}
return rows;
}
public RectangularTextContainer getCell(int i, int j) {
RectangularTextContainer cell = cells.get(new CellPosition(i,j)); // JAVA_8 use getOrDefault()
return cell != null ? cell : TextChunk.EMPTY;
}
}
class CellPosition implements Comparable<CellPosition> {
CellPosition(int row, int col) {
this.row = row;
this.col = col;
}
final int row, col;
@Override public int hashCode() {
return row + 101 * col;
}
@Override public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
CellPosition other = (CellPosition) obj;
return row == other.row && col == other.col;
}
@Override public int compareTo(CellPosition other) {
int rowdiff = row - other.row;
return rowdiff != 0 ? rowdiff : col - other.col;
}
}