VariableCollection

Inheritance: java.lang.Object

All Implemented Interfaces: java.lang.Iterable

public class VariableCollection implements Iterable

A collection of document variables.

To learn more, visit the Work with Document Properties documentation article.

Remarks:

Variable names and values are strings.

Variable names are case-insensitive.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Methods

Method	Description
add(String name, String value)	Adds a document variable to the collection.
clear()	Removes all elements from the collection.
contains(String name)	Determines whether the collection contains a document variable with the given name.
get(int index)	Gets a document variable at the specified index.
get(String name)	Provides access to the collection items.
getCount()	Gets the number of elements contained in the collection.
indexOfKey(String name)	Returns the zero-based index of the specified document variable in the collection.
iterator()	Returns an enumerator object that can be used to iterate over all variable in the collection.
remove(String name)	Removes a document variable with the specified name from the collection.
removeAt(int index)	Removes a document variable at the specified index.
set(int index, String value)	Sets a document variable at the specified index.
set(String name, String value)	Provides access to the collection items.

add(String name, String value)

public void add(String name, String value)

Adds a document variable to the collection.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Parameters:

Parameter	Type	Description
name	java.lang.String	The case-insensitive name of the variable to add.
value	java.lang.String	The value of the variable. The value cannot be null , if value is null empty string will be used instead.

clear()

public void clear()

Removes all elements from the collection.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

contains(String name)

public boolean contains(String name)

Determines whether the collection contains a document variable with the given name.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Parameters:

Parameter	Type	Description
name	java.lang.String	Case-insensitive name of the document variable to locate.

Returns: boolean - true if item is found in the collection; otherwise, false .

get(int index)

public String get(int index)

Gets a document variable at the specified index. null values are not allowed as a right hand side of the assignment and will be replaced by empty string.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Parameters:

Parameter	Type	Description
index	int	Zero-based index of the document variable.

Returns: java.lang.String - A document variable at the specified index.

get(String name)

public String get(String name)

Provides access to the collection items. Gets or a sets a document variable by the case-insensitive name. null values are not allowed as a right hand side of the assignment and will be replaced by empty string.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Parameters:

Parameter	Type	Description
name	java.lang.String

Returns: java.lang.String - The corresponding java.lang.String value.

getCount()

public int getCount()

Gets the number of elements contained in the collection.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Returns: int - The number of elements contained in the collection.

indexOfKey(String name)

public int indexOfKey(String name)

Returns the zero-based index of the specified document variable in the collection.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Parameters:

Parameter	Type	Description
name	java.lang.String	The case-insensitive name of the variable.

Returns: int - The zero based index. Negative value if not found.

iterator()

public Iterator iterator()

Returns an enumerator object that can be used to iterate over all variable in the collection.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Returns: java.util.Iterator

remove(String name)

public void remove(String name)

Removes a document variable with the specified name from the collection.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Parameters:

Parameter	Type	Description
name	java.lang.String	The case-insensitive name of the variable.

removeAt(int index)

public void removeAt(int index)

Removes a document variable at the specified index.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Parameters:

Parameter	Type	Description
index	int	The zero based index.

set(int index, String value)

public void set(int index, String value)

Sets a document variable at the specified index. null values are not allowed as a right hand side of the assignment and will be replaced by empty string.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Parameters:

Parameter	Type	Description
index	int	Zero-based index of the document variable.
value	java.lang.String	A document variable at the specified index.

set(String name, String value)

public void set(String name, String value)

Provides access to the collection items. Gets or a sets a document variable by the case-insensitive name. null values are not allowed as a right hand side of the assignment and will be replaced by empty string.

Examples:

Shows how to work with a document’s variable collection.

 Document doc = new Document();
 VariableCollection variables = doc.getVariables();

 // Every document has a collection of key/value pair variables, which we can add items to.
 variables.add("Home address", "123 Main St.");
 variables.add("City", "London");
 variables.add("Bedrooms", "3");

 Assert.assertEquals(3, variables.getCount());

 // We can display the values of variables in the document body using DOCVARIABLE fields.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocVariable field = (FieldDocVariable) builder.insertField(FieldType.FIELD_DOC_VARIABLE, true);
 field.setVariableName("Home address");
 field.update();

 Assert.assertEquals("123 Main St.", field.getResult());

 // Assigning values to existing keys will update them.
 variables.add("Home address", "456 Queen St.");

 // We will then have to update DOCVARIABLE fields to ensure they display an up-to-date value.
 Assert.assertEquals("123 Main St.", field.getResult());

 field.update();

 Assert.assertEquals("456 Queen St.", field.getResult());

 // Verify that the document variables with a certain name or value exist.
 Assert.assertTrue(variables.contains("City"));
 Assert.assertTrue(IterableUtils.matchesAny(variables, s -> s.getValue() == "London"));

 // The collection of variables automatically sorts variables alphabetically by name.
 Assert.assertEquals(0, variables.indexOfKey("Bedrooms"));
 Assert.assertEquals(1, variables.indexOfKey("City"));
 Assert.assertEquals(2, variables.indexOfKey("Home address"));

 // Below are three ways of removing document variables from a collection.
 // 1 -  By name:
 variables.remove("City");

 Assert.assertFalse(variables.contains("City"));

 // 2 -  By index:
 variables.removeAt(1);

 Assert.assertFalse(variables.contains("Home address"));

 // 3 -  Clear the whole collection at once:
 variables.clear();

 Assert.assertEquals(variables.getCount(), 0);
 

Parameters:

Parameter	Type	Description
name	java.lang.String
value	java.lang.String	The corresponding java.lang.String value.