RandomSec/main/src/com/google/refine/model/Row.java

/*

Copyright 2010, Google Inc.
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    * Redistributions of source code must retain the above copyright
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    * Redistributions in binary form must reproduce the above
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contributors may be used to endorse or promote products derived from
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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*/

package com.google.refine.model;

import java.io.IOException;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.InjectableValues;
import com.google.refine.expr.CellTuple;
import com.google.refine.expr.HasFields;
import com.google.refine.util.ParsingUtilities;
import com.google.refine.util.Pool;

/**
 * Class representing a single Row which contains a list of {@link Cell}s.  There may
 * be multiple rows in a {@link Record}.
 */
public class Row implements HasFields {
    public boolean             flagged;
    public boolean             starred;
    final public List<Cell>    cells;
    
    private static final String FLAGGED = "flagged";
    private static final String STARRED = "starred";
    
    /**
     * Construct a new Row.
     * 
     * @param cellCount number of cells to give row initially (can be extended later)
     */
    public Row(int cellCount) {
        cells = new ArrayList<Cell>(cellCount);
    }
    
    protected Row(List<Cell> cells, boolean flagged, boolean starred) {
        this.cells = cells;
        this.flagged = flagged;
        this.starred = starred;
    }
    
    /**
     * Copy a row and return the copy. Note that this is a shallow copy, so
     * if the contents of cells are changed in the original, they will be
     * be changed in the duplicate.
     * @return the duplicated row
     */
    public Row dup() {
        Row row = new Row(cells.size());
        row.flagged = flagged;
        row.starred = starred;
        row.cells.addAll(cells);
        return row;
    }
    
    @Override
    public Object getField(String name, Properties bindings) {
        if (FLAGGED.equals(name)) {
            return flagged;
        } else if (STARRED.equals(name)) {
            return starred;
        }
        return null;
    }
    
    @Override
    public boolean fieldAlsoHasFields(String name) {
        return "cells".equals(name) || "record".equals(name);
    }
    
    @JsonIgnore
    public boolean isEmpty() {
        for (Cell cell : cells) {
            if (cell != null && cell.value != null && !isValueBlank(cell.value)) {
                return false;
            }
        }
        return true;
    }
    
    /**
     * @param cellIndex index of cell to return
     * @return given cell or null if cell doesn't exist or cell index is out of range
     */
    public Cell getCell(int cellIndex) {
        if (cellIndex >= 0 && cellIndex < cells.size()) {
            return cells.get(cellIndex);
        } else {
            return null;
        }
    }
    
    public Object getCellValue(int cellIndex) {
        if (cellIndex >= 0 && cellIndex < cells.size()) {
            Cell cell = cells.get(cellIndex);
            if (cell != null) {
                return cell.value;
            }
        }
        return null;
    }
    
    public boolean isCellBlank(int cellIndex) {
        return isValueBlank(getCellValue(cellIndex));
    }
    
    protected boolean isValueBlank(Object value) {
        return value == null || (value instanceof String && ((String) value).trim().length() == 0);
    }
    
    public void setCell(int cellIndex, Cell cell) {
        if (cellIndex < cells.size()) {
            cells.set(cellIndex, cell);
        } else {
            while (cellIndex > cells.size()) {
                cells.add(null);
            }
            cells.add(cell);
        }
    }
    
    public CellTuple getCellTuple(Project project) {
        return new CellTuple(project, this);
    }
    
    @JsonProperty(FLAGGED)
    public boolean isFlagged() {
        return flagged;
    }
    
    @JsonProperty(STARRED)
    public boolean isStarred() {
        return starred;
    }
    
    @JsonProperty("cells")
    public List<Cell> getCells() {
        return cells;
    }
    
    /*
    @JsonView(JsonViews.SaveMode.class)
    public 
    */
    
    public void save(Writer writer, Properties options) {
        if (options.containsKey("rowIndex")) {
            // See GetRowsCommand to serialize a row with indices
            throw new IllegalArgumentException("Serializing with row indices is not supported anymore.");
        }
        try {
            ParsingUtilities.saveWriter.writeValue(writer, this);
            Pool pool = (Pool)options.get("pool");
            if(pool != null) {
                for(Cell c : cells) {
                    if (c != null && c.recon != null) {
                        pool.pool(c.recon);
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    static public Row load(String s, Pool pool) throws Exception {
        return s.length() == 0 ? null : 
            loadStreaming(s, pool);
    }
    
    @JsonCreator
    static public Row deserialize(
            @JsonProperty(STARRED)
            boolean starred,
            @JsonProperty(FLAGGED)
            boolean flagged,
            @JsonProperty("cells")
            List<Cell> cells) {
        if (cells == null) {
            cells = new ArrayList<>();
        }
        return new Row(cells, flagged, starred);
    }
    
    static public Row loadStreaming(String s, Pool pool) throws Exception {
        InjectableValues injectableValues = new InjectableValues.Std()
                .addValue("pool", pool);
        return ParsingUtilities.mapper.setInjectableValues(injectableValues)
                .readValue(s, Row.class);
    }
    
    @Override
    public String toString() {
        StringBuffer result = new StringBuffer();
        for (Cell cell : cells) {
            result.append(cell == null ? "null" : cell.toString());
            result.append(',');
        }
        return result.toString();
    }
}