com.itextpdf.text.pdf
Class AcroFields

java.lang.Object
  com.itextpdf.text.pdf.AcroFields

public class AcroFields
extends Object

Query and change fields in existing documents either by method calls or by FDF merging.

Author:

Paulo Soares

Nested Class Summary

static class	AcroFields.FieldPosition A class representing a field position
static class	AcroFields.Item The field representations for retrieval and modification.

Field Summary

static int	DA_COLOR
static int	DA_FONT
static int	DA_SIZE
static int	FIELD_TYPE_CHECKBOX A field type.
static int	FIELD_TYPE_COMBO A field type.
static int	FIELD_TYPE_LIST A field type.
static int	FIELD_TYPE_NONE A field type invalid or not found.
static int	FIELD_TYPE_PUSHBUTTON A field type.
static int	FIELD_TYPE_RADIOBUTTON A field type.
static int	FIELD_TYPE_SIGNATURE A field type.
static int	FIELD_TYPE_TEXT A field type.

Method Summary

void	addSubstitutionFont(BaseFont font) Adds a substitution font to the list.
boolean	clearSignatureField(String name) Clears a signed field.
void	decodeGenericDictionary(PdfDictionary merged, BaseField tx)
void	exportAsFdf(FdfWriter writer) Export the fields as a FDF.
InputStream	extractRevision(String field) Extracts a revision from the document.
String[]	getAppearanceStates(String fieldName) Gets the list of appearance names.
ArrayList<String>	getBlankSignatureNames() Gets the field names that have blank signatures.
String	getField(String name) Gets the field value.
Map<String,TextField>	getFieldCache() Gets the appearances cache.
AcroFields.Item	getFieldItem(String name) Gets the field structure.
List<AcroFields.FieldPosition>	getFieldPositions(String name) Gets the field box positions in the document.
String	getFieldRichValue(String name) Retrieve the rich value for the given field
Map<String,AcroFields.Item>	getFields() Gets all the fields.
int	getFieldType(String fieldName) Gets the field type.
String[]	getListOptionDisplay(String fieldName) Gets the list of display option values from fields of type list or combo.
String[]	getListOptionExport(String fieldName) Gets the list of export option values from fields of type list or combo.
String[]	getListSelection(String name) Gets the field values of a Choice field.
PushbuttonField	getNewPushbuttonFromField(String field) Creates a new pushbutton from an existing field.
PushbuttonField	getNewPushbuttonFromField(String field, int order) Creates a new pushbutton from an existing field.
int	getRevision(String field) Gets this field revision.
PdfDictionary	getSignatureDictionary(String name) Gets the signature dictionary, the one keyed by /V.
ArrayList<String>	getSignatureNames() Gets the field names that have signatures and are signed.
ArrayList<BaseFont>	getSubstitutionFonts() Gets the list of substitution fonts.
int	getTotalRevisions() Gets the total number of revisions this document has.
String	getTranslatedFieldName(String name) Gets the long XFA translated name.
XfaForm	getXfa() Gets the XFA form processor.
boolean	isGenerateAppearances() Gets the property generateAppearances.
void	mergeXfaData(Node n) Merges an XML data structure into this form.
boolean	regenerateField(String name) Regenerates the field appearance.
boolean	removeField(String name) Removes a field from the document.
boolean	removeField(String name, int page) Removes a field from the document.
boolean	removeFieldsFromPage(int page) Removes all the fields from page.
void	removeXfa() Removes the XFA stream from the document.
boolean	renameField(String oldName, String newName) Renames a field.
boolean	replacePushbuttonField(String field, PdfFormField button) Replaces the first field with a new pushbutton.
boolean	replacePushbuttonField(String field, PdfFormField button, int order) Replaces the designated field with a new pushbutton.
void	setExtraMargin(float extraMarginLeft, float extraMarginTop) Sets extra margins in text fields to better mimic the Acrobat layout.
boolean	setField(String name, String value) Sets the field value.
boolean	setField(String name, String value, String display) Sets the field value and the display string.
void	setFieldCache(Map<String,TextField> fieldCache) Sets a cache for field appearances.
boolean	setFieldProperty(String field, String name, int value, int[] inst) Sets a field property.
boolean	setFieldProperty(String field, String name, Object value, int[] inst) Sets a field property.
boolean	setFieldRichValue(String name, String richValue) Sets the rich value for the given field.
void	setFields(FdfReader fdf) Sets the fields by FDF merging.
void	setFields(XfdfReader xfdf) Sets the fields by XFDF merging.
void	setGenerateAppearances(boolean generateAppearances) Sets the option to generate appearances.
boolean	setListOption(String fieldName, String[] exportValues, String[] displayValues) Sets the option list for fields of type list or combo.
boolean	setListSelection(String name, String[] value) Sets different values in a list selection.
void	setSubstitutionFonts(ArrayList<BaseFont> substitutionFonts) Sets a list of substitution fonts.
boolean	signatureCoversWholeDocument(String name) Checks is the signature covers the entire document or just part of it.
static Object[]	splitDAelements(String da)
PdfPKCS7	verifySignature(String name) Verifies a signature.
PdfPKCS7	verifySignature(String name, String provider) Verifies a signature.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DA_FONT

public static final int DA_FONT

See Also:

Constant Field Values

DA_SIZE

public static final int DA_SIZE

See Also:

Constant Field Values

DA_COLOR

public static final int DA_COLOR

See Also:

Constant Field Values

FIELD_TYPE_NONE

public static final int FIELD_TYPE_NONE

A field type invalid or not found.

See Also:

Constant Field Values

FIELD_TYPE_PUSHBUTTON

public static final int FIELD_TYPE_PUSHBUTTON

A field type.

See Also:

Constant Field Values

FIELD_TYPE_CHECKBOX

public static final int FIELD_TYPE_CHECKBOX

A field type.

See Also:

Constant Field Values

FIELD_TYPE_RADIOBUTTON

public static final int FIELD_TYPE_RADIOBUTTON

A field type.

See Also:

Constant Field Values

FIELD_TYPE_TEXT

public static final int FIELD_TYPE_TEXT

A field type.

See Also:

Constant Field Values

FIELD_TYPE_LIST

public static final int FIELD_TYPE_LIST

A field type.

See Also:

Constant Field Values

FIELD_TYPE_COMBO

public static final int FIELD_TYPE_COMBO

A field type.

See Also:

Constant Field Values

FIELD_TYPE_SIGNATURE

public static final int FIELD_TYPE_SIGNATURE

A field type.

See Also:

Constant Field Values

Method Detail

getAppearanceStates

public String[] getAppearanceStates(String fieldName)

Gets the list of appearance names. Use it to get the names allowed with radio and checkbox fields. If the /Opt key exists the values will also be included. The name 'Off' may also be valid even if not returned in the list. For Comboboxes it will return an array of display values. To extract the export values of a Combobox, please refer to getListOptionExport(String)

Parameters:

fieldName - the fully qualified field name

Returns:

the list of names or null if the field does not exist

getListOptionExport

public String[] getListOptionExport(String fieldName)

Gets the list of export option values from fields of type list or combo. If the field doesn't exist or the field type is not list or combo it will return null.

Parameters:

fieldName - the field name

Returns:

the list of export option values from fields of type list or combo

getListOptionDisplay

public String[] getListOptionDisplay(String fieldName)

Gets the list of display option values from fields of type list or combo. If the field doesn't exist or the field type is not list or combo it will return null.

Parameters:

fieldName - the field name

Returns:

the list of export option values from fields of type list or combo

setListOption

public boolean setListOption(String fieldName,
                             String[] exportValues,
                             String[] displayValues)

Sets the option list for fields of type list or combo. One of exportValues or displayValues may be null but not both. This method will only set the list but will not set the value or appearance. For that, calling setField() is required.

An example:

 PdfReader pdf = new PdfReader("input.pdf");
 PdfStamper stp = new PdfStamper(pdf, new FileOutputStream("output.pdf"));
 AcroFields af = stp.getAcroFields();
 af.setListOption("ComboBox", new String[]{"a", "b", "c"}, new String[]{"first", "second", "third"});
 af.setField("ComboBox", "b");
 stp.close();
 

Parameters:

fieldName - the field name

exportValues - the export values

displayValues - the display values

Returns:

true if the operation succeeded, false otherwise

getFieldType

public int getFieldType(String fieldName)

Gets the field type. The type can be one of: FIELD_TYPE_PUSHBUTTON, FIELD_TYPE_CHECKBOX, FIELD_TYPE_RADIOBUTTON, FIELD_TYPE_TEXT, FIELD_TYPE_LIST, FIELD_TYPE_COMBO or FIELD_TYPE_SIGNATURE.

If the field does not exist or is invalid it returns FIELD_TYPE_NONE.

Parameters:

fieldName - the field name

Returns:

the field type

exportAsFdf

public void exportAsFdf(FdfWriter writer)

Export the fields as a FDF.

Parameters:

writer - the FDF writer

renameField

public boolean renameField(String oldName,
                           String newName)

Renames a field. Only the last part of the name can be renamed. For example, if the original field is "ab.cd.ef" only the "ef" part can be renamed.

Parameters:

oldName - the old field name

newName - the new field name

Returns:

true if the renaming was successful, false otherwise

splitDAelements

public static Object[] splitDAelements(String da)

decodeGenericDictionary

public void decodeGenericDictionary(PdfDictionary merged,
                                    BaseField tx)
                             throws IOException,
                                    DocumentException

Throws:

IOException

DocumentException

getFieldRichValue

public String getFieldRichValue(String name)

Retrieve the rich value for the given field

Parameters:

name -

Returns:

The rich value if present, or null.

Since:

5.0.6

getField

public String getField(String name)

Gets the field value.

Parameters:

name - the fully qualified field name

Returns:

the field value

getListSelection

public String[] getListSelection(String name)

Gets the field values of a Choice field.

Parameters:

name - the fully qualified field name

Returns:

the field value

Since:

2.1.3

setFieldProperty

public boolean setFieldProperty(String field,
                                String name,
                                Object value,
                                int[] inst)

Sets a field property. Valid property names are:

• textfont - sets the text font. The value for this entry is a BaseFont.
  
• textcolor - sets the text color. The value for this entry is a BaseColor.
  
• textsize - sets the text size. The value for this entry is a Float.
• bgcolor - sets the background color. The value for this entry is a BaseColor. If null removes the background.
  
• bordercolor - sets the border color. The value for this entry is a BaseColor. If null removes the border.
  

Parameters:

field - the field name

name - the property name

value - the property value

inst - an array of int indexing into AcroField.Item.merged elements to process. Set to null to process all

Returns:

true if the property exists, false otherwise

setFieldProperty

public boolean setFieldProperty(String field,
                                String name,
                                int value,
                                int[] inst)

Sets a field property. Valid property names are:

• flags - a set of flags specifying various characteristics of the field's widget annotation. The value of this entry replaces that of the F entry in the form's corresponding annotation dictionary.
  
• setflags - a set of flags to be set (turned on) in the F entry of the form's corresponding widget annotation dictionary. Bits equal to 1 cause the corresponding bits in F to be set to 1.
  
• clrflags - a set of flags to be cleared (turned off) in the F entry of the form's corresponding widget annotation dictionary. Bits equal to 1 cause the corresponding bits in F to be set to 0.
  
• fflags - a set of flags specifying various characteristics of the field. The value of this entry replaces that of the Ff entry in the form's corresponding field dictionary.
  
• setfflags - a set of flags to be set (turned on) in the Ff entry of the form's corresponding field dictionary. Bits equal to 1 cause the corresponding bits in Ff to be set to 1.
  
• clrfflags - a set of flags to be cleared (turned off) in the Ff entry of the form's corresponding field dictionary. Bits equal to 1 cause the corresponding bits in Ff to be set to 0.
  

Parameters:

field - the field name

name - the property name

value - the property value

inst - an array of int indexing into AcroField.Item.merged elements to process. Set to null to process all

Returns:

true if the property exists, false otherwise

mergeXfaData

public void mergeXfaData(Node n)
                  throws IOException,
                         DocumentException

Merges an XML data structure into this form.

Parameters:

n - the top node of the data structure

Throws:

IOException - on error

DocumentException - o error

setFields

public void setFields(FdfReader fdf)
               throws IOException,
                      DocumentException

Sets the fields by FDF merging.

Parameters:

fdf - the FDF form

Throws:

IOException - on error

DocumentException - on error

setFields

public void setFields(XfdfReader xfdf)
               throws IOException,
                      DocumentException

Sets the fields by XFDF merging.

Parameters:

xfdf - the XFDF form

Throws:

IOException - on error

DocumentException - on error

regenerateField

public boolean regenerateField(String name)
                        throws IOException,
                               DocumentException

Regenerates the field appearance. This is useful when you change a field property, but not its value, for instance form.setFieldProperty("f", "bgcolor", BaseColor.BLUE, null); This won't have any effect, unless you use regenerateField("f") after changing the property.

Parameters:

name - the fully qualified field name or the partial name in the case of XFA forms

Returns:

true if the field was found and changed, false otherwise

Throws:

IOException - on error

DocumentException - on error

setField

public boolean setField(String name,
                        String value)
                 throws IOException,
                        DocumentException

Sets the field value.

Parameters:

name - the fully qualified field name or the partial name in the case of XFA forms

value - the field value

Returns:

true if the field was found and changed, false otherwise

Throws:

IOException - on error

DocumentException - on error

setFieldRichValue

public boolean setFieldRichValue(String name,
                                 String richValue)
                          throws DocumentException,
                                 IOException

Sets the rich value for the given field. See PDF Reference chapter 12.7.3.4 (Rich Text) and 12.7.4.3 (Text Fields) for further details. Note that iText doesn't create an appearance for Rich Text fields. So you either need to use XML Worker to create an appearance (/N entry in the /AP dictionary), or you need to use setGenerateAppearances(false) to tell the viewer that iText didn't create any appearances.

Parameters:

name - Field name

richValue - html markup

Returns:

success/failure (will fail if the field isn't found, isn't a text field, or doesn't support rich text)

Throws:

DocumentException

IOException

Since:

5.0.6

setField

public boolean setField(String name,
                        String value,
                        String display)
                 throws IOException,
                        DocumentException

Sets the field value and the display string. The display string is used to build the appearance in the cases where the value is modified by Acrobat with JavaScript and the algorithm is known.

Parameters:

name - the fully qualified field name or the partial name in the case of XFA forms

value - the field value

display - the string that is used for the appearance. If null the value parameter will be used

Returns:

true if the field was found and changed, false otherwise

Throws:

IOException - on error

DocumentException - on error

setListSelection

public boolean setListSelection(String name,
                                String[] value)
                         throws IOException,
                                DocumentException

Sets different values in a list selection. No appearance is generated yet; nor does the code check if multiple select is allowed.

Parameters:

name - the name of the field

value - an array with values that need to be selected

Returns:

true only if the field value was changed

Throws:

IOException

DocumentException

Since:

2.1.4

getFields

public Map<String,AcroFields.Item> getFields()

Gets all the fields. The fields are keyed by the fully qualified field name and the value is an instance of AcroFields.Item.

Returns:

all the fields

getFieldItem

public AcroFields.Item getFieldItem(String name)

Gets the field structure.

Parameters:

name - the name of the field

Returns:

the field structure or null if the field does not exist

getTranslatedFieldName

public String getTranslatedFieldName(String name)

Gets the long XFA translated name.

Parameters:

name - the name of the field

Returns:

the long field name

getFieldPositions

public List<AcroFields.FieldPosition> getFieldPositions(String name)

Gets the field box positions in the document. The return is an array of float multiple of 5. For each of this groups the values are: [page, llx, lly, urx, ury]. The coordinates have the page rotation in consideration.

Parameters:

name - the field name

Returns:

the positions or null if field does not exist

removeFieldsFromPage

public boolean removeFieldsFromPage(int page)

Removes all the fields from page.

Parameters:

page - the page to remove the fields from

Returns:

true if any field was removed, false otherwise

removeField

public boolean removeField(String name,
                           int page)

Removes a field from the document. If page equals -1 all the fields with this name are removed from the document otherwise only the fields in that particular page are removed.

Parameters:

name - the field name

page - the page to remove the field from or -1 to remove it from all the pages

Returns:

true if the field exists, false otherwise

removeField

public boolean removeField(String name)

Removes a field from the document.

Parameters:

name - the field name

Returns:

true if the field exists, false otherwise

isGenerateAppearances

public boolean isGenerateAppearances()

Gets the property generateAppearances.

Returns:

the property generateAppearances

setGenerateAppearances

public void setGenerateAppearances(boolean generateAppearances)

Sets the option to generate appearances. Not generating appearances will speed-up form filling but the results can be unexpected in Acrobat. Don't use it unless your environment is well controlled. The default is true.

Parameters:

generateAppearances - the option to generate appearances

clearSignatureField

public boolean clearSignatureField(String name)

Clears a signed field.

Parameters:

name - the field name

Returns:

true if the field was signed, false if the field was not signed or not found

Since:

5.0.5

getSignatureNames

public ArrayList<String> getSignatureNames()

Gets the field names that have signatures and are signed.

Returns:

the field names that have signatures and are signed

getBlankSignatureNames

public ArrayList<String> getBlankSignatureNames()

Gets the field names that have blank signatures.

Returns:

the field names that have blank signatures

getSignatureDictionary

public PdfDictionary getSignatureDictionary(String name)

Gets the signature dictionary, the one keyed by /V.

Parameters:

name - the field name

Returns:

the signature dictionary keyed by /V or null if the field is not a signature

signatureCoversWholeDocument

public boolean signatureCoversWholeDocument(String name)

Checks is the signature covers the entire document or just part of it.

Parameters:

name - the signature field name

Returns:

true if the signature covers the entire document, false otherwise

verifySignature

public PdfPKCS7 verifySignature(String name)

Verifies a signature. An example usage is:

 KeyStore kall = PdfPKCS7.loadCacertsKeyStore();
 PdfReader reader = new PdfReader("my_signed_doc.pdf");
 AcroFields af = reader.getAcroFields();
 ArrayList names = af.getSignatureNames();
 for (int k = 0; k < names.size(); ++k) {
    String name = (String)names.get(k);
    System.out.println("Signature name: " + name);
    System.out.println("Signature covers whole document: " + af.signatureCoversWholeDocument(name));
    PdfPKCS7 pk = af.verifySignature(name);
    Calendar cal = pk.getSignDate();
    Certificate pkc[] = pk.getCertificates();
    System.out.println("Subject: " + PdfPKCS7.getSubjectFields(pk.getSigningCertificate()));
    System.out.println("Document modified: " + !pk.verify());
    Object fails[] = PdfPKCS7.verifyCertificates(pkc, kall, null, cal);
    if (fails == null)
        System.out.println("Certificates verified against the KeyStore");
    else
        System.out.println("Certificate failed: " + fails[1]);
 }
 

Parameters:

name - the signature field name

Returns:

a PdfPKCS7 class to continue the verification

verifySignature

public PdfPKCS7 verifySignature(String name,
                                String provider)

Verifies a signature. An example usage is:

 KeyStore kall = PdfPKCS7.loadCacertsKeyStore();
 PdfReader reader = new PdfReader("my_signed_doc.pdf");
 AcroFields af = reader.getAcroFields();
 ArrayList names = af.getSignatureNames();
 for (int k = 0; k < names.size(); ++k) {
    String name = (String)names.get(k);
    System.out.println("Signature name: " + name);
    System.out.println("Signature covers whole document: " + af.signatureCoversWholeDocument(name));
    PdfPKCS7 pk = af.verifySignature(name);
    Calendar cal = pk.getSignDate();
    Certificate pkc[] = pk.getCertificates();
    System.out.println("Subject: " + PdfPKCS7.getSubjectFields(pk.getSigningCertificate()));
    System.out.println("Document modified: " + !pk.verify());
    Object fails[] = PdfPKCS7.verifyCertificates(pkc, kall, null, cal);
    if (fails == null)
        System.out.println("Certificates verified against the KeyStore");
    else
        System.out.println("Certificate failed: " + fails[1]);
 }
 

Parameters:

name - the signature field name

provider - the provider or null for the default provider

Returns:

a PdfPKCS7 class to continue the verification

getTotalRevisions

public int getTotalRevisions()

Gets the total number of revisions this document has.

Returns:

the total number of revisions

getRevision

public int getRevision(String field)

Gets this field revision.

Parameters:

field - the signature field name

Returns:

the revision or zero if it's not a signature field

extractRevision

public InputStream extractRevision(String field)
                            throws IOException

Extracts a revision from the document.

Parameters:

field - the signature field name

Returns:

an InputStream covering the revision. Returns null if it's not a signature field

Throws:

IOException - on error

getFieldCache

public Map<String,TextField> getFieldCache()

Gets the appearances cache.

Returns:

the appearances cache

Since:

2.1.5 this method used to return a HashMap

setFieldCache

public void setFieldCache(Map<String,TextField> fieldCache)

Sets a cache for field appearances. Parsing the existing PDF to create a new TextField is time expensive. For those tasks that repeatedly fill the same PDF with different field values the use of the cache has dramatic speed advantages. An example usage:

 String pdfFile = ...;// the pdf file used as template
 ArrayList xfdfFiles = ...;// the xfdf file names
 ArrayList pdfOutFiles = ...;// the output file names, one for each element in xpdfFiles
 HashMap cache = new HashMap();// the appearances cache
 PdfReader originalReader = new PdfReader(pdfFile);
 for (int k = 0; k < xfdfFiles.size(); ++k) {
    PdfReader reader = new PdfReader(originalReader);
    XfdfReader xfdf = new XfdfReader((String)xfdfFiles.get(k));
    PdfStamper stp = new PdfStamper(reader, new FileOutputStream((String)pdfOutFiles.get(k)));
    AcroFields af = stp.getAcroFields();
    af.setFieldCache(cache);
    af.setFields(xfdf);
    stp.close();
 }
 

Parameters:

fieldCache - a Map that will carry the cached appearances

Since:

2.1.5 this method used to take a HashMap as parameter

setExtraMargin

public void setExtraMargin(float extraMarginLeft,
                           float extraMarginTop)

Sets extra margins in text fields to better mimic the Acrobat layout.

Parameters:

extraMarginLeft - the extra margin left

extraMarginTop - the extra margin top

addSubstitutionFont

public void addSubstitutionFont(BaseFont font)

Adds a substitution font to the list. The fonts in this list will be used if the original font doesn't contain the needed glyphs.

Parameters:

font - the font

getSubstitutionFonts

public ArrayList<BaseFont> getSubstitutionFonts()

Gets the list of substitution fonts. The list is composed of BaseFont and can be null. The fonts in this list will be used if the original font doesn't contain the needed glyphs.

Returns:

the list

setSubstitutionFonts

public void setSubstitutionFonts(ArrayList<BaseFont> substitutionFonts)

Sets a list of substitution fonts. The list is composed of BaseFont and can also be null. The fonts in this list will be used if the original font doesn't contain the needed glyphs.

Parameters:

substitutionFonts - the list

getXfa

public XfaForm getXfa()

Gets the XFA form processor.

Returns:

the XFA form processor

removeXfa

public void removeXfa()

Removes the XFA stream from the document.

getNewPushbuttonFromField

public PushbuttonField getNewPushbuttonFromField(String field)

Creates a new pushbutton from an existing field. If there are several pushbuttons with the same name only the first one is used. This pushbutton can be changed and be used to replace an existing one, with the same name or other name, as long is it is in the same document. To replace an existing pushbutton call replacePushbuttonField(String,PdfFormField).

Parameters:

field - the field name that should be a pushbutton

Returns:

a new pushbutton or null if the field is not a pushbutton

getNewPushbuttonFromField

public PushbuttonField getNewPushbuttonFromField(String field,
                                                 int order)

Creates a new pushbutton from an existing field. This pushbutton can be changed and be used to replace an existing one, with the same name or other name, as long is it is in the same document. To replace an existing pushbutton call replacePushbuttonField(String,PdfFormField,int).

Parameters:

field - the field name that should be a pushbutton

order - the field order in fields with same name

Returns:

a new pushbutton or null if the field is not a pushbutton

Since:

2.0.7

replacePushbuttonField

public boolean replacePushbuttonField(String field,
                                      PdfFormField button)

Replaces the first field with a new pushbutton. The pushbutton can be created with getNewPushbuttonFromField(String) from the same document or it can be a generic PdfFormField of the type pushbutton.

Parameters:

field - the field name

button - the PdfFormField representing the pushbutton

Returns:

true if the field was replaced, false if the field was not a pushbutton

replacePushbuttonField

public boolean replacePushbuttonField(String field,
                                      PdfFormField button,
                                      int order)

Replaces the designated field with a new pushbutton. The pushbutton can be created with getNewPushbuttonFromField(String,int) from the same document or it can be a generic PdfFormField of the type pushbutton.

Parameters:

field - the field name

button - the PdfFormField representing the pushbutton

order - the field order in fields with same name

Returns:

true if the field was replaced, false if the field was not a pushbutton

Since:

2.0.7