Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## org.apache.java.util
Class ExtendedProperties

    java.lang.Object
      |
      +--java.util.Dictionary
            |
            +--java.util.Hashtable
                  |
                  +--org.apache.java.util.ConfigurationsRepository
                        |
                        +--org.apache.java.util.ExtendedProperties

public class ExtendedProperties
extends ConfigurationsRepository

This class extends normal Java properties by adding the possibility to use the same key many times concatenating the value strings instead of overwriting them.

The Extended Properties syntax is explained here:

- each property has the syntax `key = value`
- the key may use any character but the equal sign '='
- value may be separated on different lines if a backslash is placed at the end of the line that continues below.
- if value is a list of strings, each token is separated by a comma ','
- Commas in each token are escaped placing a backslash right before the comma.
- if a key is used more than once, the values are appended like if they were on the same line separated with commas.
- blank lines and lines starting with character '#' are skipped

Here is an example of a valid extended properties file:

          # lines starting with # are comments

          # This is the simplest property
          key = value

          # A long property may be separated on multiple lines
          longvalue = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa \
                      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

          # This is a property with many tokens
          tokens_on_a_line = first token, second token

          # This sequence generates exactly the same result
          tokens_on_multiple_lines = first token
          tokens_on_multiple_lines = second token

          # commas may be escaped in tokens
          commas.excaped = Hi\, what'up?

NOTE: this class has not been written for performance nor low memory usage. In fact, it's way slower than it could be and generates too much memory garbage. But since performance it's not an issue during intialization (and there no much time to improve it), I wrote it this way. If you don't like it, go ahead and tune it up!

Version:
  $Revision: 1.10 $ $Date: 1999/07/14 14:00:27 $
See Also:
  `Configurations`, Serialized Form

Inner Class Summary
`(package private) class` | `ExtendedProperties.PropertiesReader` This class is used to read properties lines.
`(package private) class` | `ExtendedProperties.PropertiesTokenizer` This class divides into tokens a property value.

Fields inherited from class org.apache.java.util.ConfigurationsRepository
`file, model`

Fields inherited from class java.util.Hashtable
`count, ENTRIES, entrySet, KEYS, keySet, loadFactor, modCount, serialVersionUID, table, threshold, values, VALUES`

Constructor Summary
`ExtendedProperties()` Creates an empty extended properties object.
`ExtendedProperties(java.lang.String file)` Creates and loads the extended properties from the specified file.

Method Summary
`void` | `load(java.io.InputStream input)` Load the properties from the given input stream.
`void` | `save(java.io.OutputStream output, java.lang.String Header)` Save the properties to the given outputstream.

Methods inherited from class java.util.Hashtable
`clear, clone, contains, containsKey, containsValue, elements, entrySet, equals, get, hashCode, isEmpty, keys, keySet, put, putAll, readObject, rehash, remove, size, toString, values, writeObject`

Methods inherited from class java.lang.Object
`, finalize, getClass, notify, notifyAll, registerNatives, wait, wait, wait`

Constructor Detail

### ExtendedProperties

    public ExtendedProperties()

  Creates an empty extended properties object.

### ExtendedProperties

    public ExtendedProperties(java.lang.String file)
                       throws java.io.IOException

  Creates and loads the extended properties from the specified file.

Method Detail

### load

    public void load(java.io.InputStream input)
              throws java.io.IOException

  Load the properties from the given input stream.
  Overrides:
    load in class ConfigurationsRepository

### save

    public void save(java.io.OutputStream output,
                     java.lang.String Header)
              throws java.io.IOException

  Save the properties to the given outputstream.
  Overrides:
    save in class ConfigurationsRepository

Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD