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   this work for additional information regarding copyright ownership.
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   (the "License"); you may not use this file except in compliance with
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       http://www.apache.org/licenses/LICENSE-2.0

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   distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.poi.xssf.usermodel;

import java.net.URI;
import java.net.URISyntaxException;

import org.apache.poi.common.usermodel.HyperlinkType;
import org.apache.poi.openxml4j.opc.PackagePart;
import org.apache.poi.openxml4j.opc.PackageRelationship;
import org.apache.poi.ss.usermodel.Hyperlink;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.util.Internal;
import org.apache.poi.util.Removal;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTHyperlink;

XSSF Implementation of a Hyperlink.
Note - unlike with HSSF, many kinds of hyperlink
are largely stored as relations of the sheet
/**
 * XSSF Implementation of a Hyperlink.
 * Note - unlike with HSSF, many kinds of hyperlink
 * are largely stored as relations of the sheet
 */
public class XSSFHyperlink implements Hyperlink {
    final private HyperlinkType _type;
    final private PackageRelationship _externalRel;
    final private CTHyperlink _ctHyperlink; //contains a reference to the cell where the hyperlink is anchored, getRef()
    private String _location; //what the hyperlink refers to

    
Create a new XSSFHyperlink. This method is protected to be used only by XSSFCreationHelper.createHyperlink(HyperlinkType). 
Params:
type – - the type of hyperlink to create/**
     * Create a new XSSFHyperlink. This method is protected to be used only by
     * {@link XSSFCreationHelper#createHyperlink(HyperlinkType)}.
     *
     * @param type - the type of hyperlink to create
     */
    protected XSSFHyperlink(HyperlinkType type) {
        _type = type;
        _ctHyperlink = CTHyperlink.Factory.newInstance();
        _externalRel = null;
    }

    
Create a XSSFHyperlink and initialize it from the supplied CTHyperlink bean and package relationship
Params:
ctHyperlink – the xml bean containing xml properties
hyperlinkRel – the relationship in the underlying OPC package which stores the actual link's address/**
     * Create a XSSFHyperlink and initialize it from the supplied CTHyperlink bean and package relationship
     *
     * @param ctHyperlink the xml bean containing xml properties
     * @param hyperlinkRel the relationship in the underlying OPC package which stores the actual link's address
     */
    protected XSSFHyperlink(CTHyperlink ctHyperlink, PackageRelationship hyperlinkRel) {
        _ctHyperlink = ctHyperlink;
        _externalRel = hyperlinkRel;

        // Figure out the Hyperlink type and destination

        if (_externalRel == null) {
            // If it has a location, it's internal
            if (ctHyperlink.getLocation() != null) {
                _type = HyperlinkType.DOCUMENT;
                _location = ctHyperlink.getLocation();
            } else if (ctHyperlink.getId() != null) {
                throw new IllegalStateException("The hyperlink for cell "
                        + ctHyperlink.getRef() + " references relation "
                        + ctHyperlink.getId() + ", but that didn't exist!");
            } else {
                // hyperlink is internal and is not related to other parts
                _type = HyperlinkType.DOCUMENT;
            }
        } else {
            URI target = _externalRel.getTargetURI();
            _location = target.toString();
            if (ctHyperlink.getLocation() != null) {
                // URI fragment
                _location += "#" + ctHyperlink.getLocation();
            }

            // Try to figure out the type
               if (_location.startsWith("http://") || _location.startsWith("https://")
                    || _location.startsWith("ftp://")) {
                _type = HyperlinkType.URL;
            } else if (_location.startsWith("mailto:")) {
                _type = HyperlinkType.EMAIL;
            } else {
                _type = HyperlinkType.FILE;
            }
        }

     }

    
Create a new XSSFHyperlink. This method is for Internal use only. XSSFHyperlinks can be created by XSSFCreationHelper. See the spreadsheet quick-guide
for an example.
Params:
other – the hyperlink to copy/**
     * Create a new XSSFHyperlink. This method is for Internal use only.
     * XSSFHyperlinks can be created by {@link XSSFCreationHelper}.
     * See the <a href="https://poi.apache.org/spreadsheet/quick-guide.html#Hyperlinks">spreadsheet quick-guide</a>
     * for an example.
     *
     * @param other the hyperlink to copy
     */
    @Internal //FIXME: change to protected if/when SXSSFHyperlink class is created
    public XSSFHyperlink(Hyperlink other) {
        if (other instanceof XSSFHyperlink) {
            XSSFHyperlink xlink = (XSSFHyperlink) other;
            _type = xlink.getType();
            _location = xlink._location;
            _externalRel = xlink._externalRel;
            _ctHyperlink = (CTHyperlink) xlink._ctHyperlink.copy();
        }
        else {
            _type = other.getType();
            _location = other.getAddress();
            _externalRel = null;
            _ctHyperlink = CTHyperlink.Factory.newInstance();
            setCellReference(new CellReference(other.getFirstRow(), other.getFirstColumn()));
        }
    }
    
Returns:
the underlying CTHyperlink object/**
     * @return the underlying CTHyperlink object
     */
    @Internal
    public CTHyperlink getCTHyperlink() {
        return _ctHyperlink;
    }

    
Do we need to a relation too, to represent
this hyperlink?
/**
     * Do we need to a relation too, to represent
     * this hyperlink?
     */
    public boolean needsRelationToo() {
        return (_type != HyperlinkType.DOCUMENT);
    }

    
Generates the relation if required
/**
     * Generates the relation if required
     */
    protected void generateRelationIfNeeded(PackagePart sheetPart) {
        if (_externalRel == null && needsRelationToo()) {
            // Generate the relation
            PackageRelationship rel =
                    sheetPart.addExternalRelationship(_location, XSSFRelation.SHEET_HYPERLINKS.getRelation());

            // Update the r:id
            _ctHyperlink.setId(rel.getId());
        }
    }

    
Return the type of this hyperlink
See Also:
HyperlinkType.forInt
Returns:
the type of this hyperlink/**
     * Return the type of this hyperlink
     *
     * @return the type of this hyperlink
     * @see HyperlinkType#forInt
     */
    @Override
    public HyperlinkType getType() {
        return _type;
    }
    
    
Return the type of this hyperlink
Returns:
the type of this hyperlink
Deprecated:
use getType instead/**
     * Return the type of this hyperlink
     *
     * @return the type of this hyperlink
     * @deprecated use <code>getType</code> instead
     */
    @Deprecated
    @Removal(version = "4.2")
    @Override
    public HyperlinkType getTypeEnum() {
        return getType();
    }

    
Get the address of the cell this hyperlink applies to, e.g. A55
/**
     * Get the address of the cell this hyperlink applies to, e.g. A55
     */
    public String getCellRef() {
        return _ctHyperlink.getRef();
    }

    
Hyperlink address. Depending on the hyperlink type it can be URL, e-mail, path to a file.
The is the hyperlink target.
Returns:
the address of this hyperlink/**
     * Hyperlink address. Depending on the hyperlink type it can be URL, e-mail, path to a file.
     * The is the hyperlink target.
     *
     * @return the address of this hyperlink
     */
    @Override
    public String getAddress() {
        return _location;
    }

    
Return text label for this hyperlink
Returns:
text to display/**
     * Return text label for this hyperlink
     *
     * @return text to display
     */
    @Override
    public String getLabel() {
        return _ctHyperlink.getDisplay();
    }

    
Location within target. If target is a workbook (or this workbook) this shall refer to a
sheet and cell or a defined name. Can also be an HTML anchor if target is HTML file.
Returns:
location/**
     * Location within target. If target is a workbook (or this workbook) this shall refer to a
     * sheet and cell or a defined name. Can also be an HTML anchor if target is HTML file.
     *
     * @return location
     */
    public String getLocation() {
        return _ctHyperlink.getLocation();
    }

    
Sets text label for this hyperlink
Params:
label – text label for this hyperlink/**
     * Sets text label for this hyperlink
     *
     * @param label text label for this hyperlink
     */
    @Override
    public void setLabel(String label) {
        _ctHyperlink.setDisplay(label);
    }

    
Location within target. If target is a workbook (or this workbook) this shall refer to a
sheet and cell or a defined name. Can also be an HTML anchor if target is HTML file.
Params:
location – - string representing a location of this hyperlink/**
     * Location within target. If target is a workbook (or this workbook) this shall refer to a
     * sheet and cell or a defined name. Can also be an HTML anchor if target is HTML file.
     *
     * @param location - string representing a location of this hyperlink
     */
    public void setLocation(String location) {
        _ctHyperlink.setLocation(location);
    }

    
Hyperlink address. Depending on the hyperlink type it can be URL, e-mail, path to a file
This is the hyperlink target.
Params:
address – - the address of this hyperlink/**
     * Hyperlink address. Depending on the hyperlink type it can be URL, e-mail, path to a file
     * This is the hyperlink target.
     *
     * @param address - the address of this hyperlink
     */
    @Override
    public void setAddress(String address) {
        validate(address);

       _location = address;
        //we must set location for internal hyperlinks
        if (_type == HyperlinkType.DOCUMENT) {
            setLocation(address);
        }
    }

    @SuppressWarnings("fall-through")
    private void validate(String address) {
        switch (_type) {
            // email, path to file and url must be valid URIs
            case EMAIL:
            case FILE:
            case URL:
                try {
                    new URI(address);
                } catch (URISyntaxException e) {
                    throw new IllegalArgumentException("Address of hyperlink must be a valid URI", e);
                }
                break;
            case DOCUMENT:
                // currently not evaluating anything.
                break;
            default:
                throw new IllegalStateException("Invalid Hyperlink type: " + _type);
        }
    }

    
Assigns this hyperlink to the given cell reference
/**
     * Assigns this hyperlink to the given cell reference
     */
    @Internal
    public void setCellReference(String ref) {
        _ctHyperlink.setRef(ref);
    }
    @Internal
    public void setCellReference(CellReference ref) {
        setCellReference(ref.formatAsString());
    }

    private CellReference buildCellReference() {
        String ref = _ctHyperlink.getRef();
        if (ref == null) {
            ref = "A1";
        }
        return new CellReference(ref);
    }


    
Return the column of the first cell that contains the hyperlink
Returns:
the 0-based column of the first cell that contains the hyperlink/**
     * Return the column of the first cell that contains the hyperlink
     *
     * @return the 0-based column of the first cell that contains the hyperlink
     */
    @Override
    public int getFirstColumn() {
        return buildCellReference().getCol();
    }


    
Return the column of the last cell that contains the hyperlink
Returns:
the 0-based column of the last cell that contains the hyperlink/**
     * Return the column of the last cell that contains the hyperlink
     *
     * @return the 0-based column of the last cell that contains the hyperlink
     */
    @Override
    public int getLastColumn() {
        return buildCellReference().getCol();
    }

    
Return the row of the first cell that contains the hyperlink
Returns:
the 0-based row of the cell that contains the hyperlink/**
     * Return the row of the first cell that contains the hyperlink
     *
     * @return the 0-based row of the cell that contains the hyperlink
     */
    @Override
    public int getFirstRow() {
        return buildCellReference().getRow();
    }


    
Return the row of the last cell that contains the hyperlink
Returns:
the 0-based row of the last cell that contains the hyperlink/**
     * Return the row of the last cell that contains the hyperlink
     *
     * @return the 0-based row of the last cell that contains the hyperlink
     */
    @Override
    public int getLastRow() {
        return buildCellReference().getRow();
    }

    
Set the column of the first cell that contains the hyperlink
Params:
col – the 0-based column of the first cell that contains the hyperlink/**
     * Set the column of the first cell that contains the hyperlink
     *
     * @param col the 0-based column of the first cell that contains the hyperlink
     */
    @Override
    public void setFirstColumn(int col) {
        setCellReference(new CellReference( getFirstRow(), col ));
    }

    
Set the column of the last cell that contains the hyperlink.
For XSSF, a Hyperlink may only reference one cell
Params:
col – the 0-based column of the last cell that contains the hyperlink/**
     * Set the column of the last cell that contains the hyperlink.
     * For XSSF, a Hyperlink may only reference one cell
     *
     * @param col the 0-based column of the last cell that contains the hyperlink
     */
    @Override
    public void setLastColumn(int col) {
        setFirstColumn(col);
    }

    
Set the row of the first cell that contains the hyperlink
Params:
row – the 0-based row of the first cell that contains the hyperlink/**
     * Set the row of the first cell that contains the hyperlink
     *
     * @param row the 0-based row of the first cell that contains the hyperlink
     */
    @Override
    public void setFirstRow(int row) {
        setCellReference(new CellReference( row, getFirstColumn() ));
    }

    
Set the row of the last cell that contains the hyperlink.
For XSSF, a Hyperlink may only reference one cell
Params:
row – the 0-based row of the last cell that contains the hyperlink/**
     * Set the row of the last cell that contains the hyperlink.
     * For XSSF, a Hyperlink may only reference one cell
     *
     * @param row the 0-based row of the last cell that contains the hyperlink
     */
    @Override
    public void setLastRow(int row) {
        setFirstRow(row);
	}

    
Returns:
additional text to help the user understand more about the hyperlink/**
     * @return additional text to help the user understand more about the hyperlink
     */
    public String getTooltip() {
        return _ctHyperlink.getTooltip();
    }

    
Params:
text –  additional text to help the user understand more about the hyperlink/**
     * @param text  additional text to help the user understand more about the hyperlink
     */
    public void setTooltip(String text) {
        _ctHyperlink.setTooltip(text);
    }
}