Package org.apache.velocity.tools.generic

Class ValueParser

java.lang.Object
org.apache.velocity.tools.generic.SafeConfig
org.apache.velocity.tools.generic.LocaleConfig
org.apache.velocity.tools.generic.FormatConfig
org.apache.velocity.tools.generic.ValueParser
All Implemented Interfaces:
Map<String,Object>
@DefaultKey("parser") @InvalidScope("session") @SkipSetters public class ValueParser extends FormatConfig implements Map<String,Object>

Utility class for easy parsing of String values held in a Map.

This comes in very handy when parsing parameters.

When subkeys are allowed, getValue("foo") will also search for all keys of the form "foo.bar" and return a ValueParser of the type "bar" -> value for all found values.

TODO: someone doing java configuration ought to be able to put a source Map in the tool properties, allowing this to be used like other tools
Since:
VelocityTools 1.2
Version:
$Revision$ $Date$
Author:
Nathan Bubna

  • Field Details

  • Constructor Details

    • ValueParser

      public ValueParser()

    • ValueParser

      public ValueParser(Map<String,Object> source)

  • Method Details

    • setSource

      protected void setSource(Map<String,Object> source)

    • getSource

      protected Map<String,Object> getSource(boolean create)

    • getSource

      protected Map<String,Object> getSource()

    • getAllowSubkeys

      protected boolean getAllowSubkeys()
      Are subkeys allowed ?
      Returns:
      yes/no

    • setAllowSubkeys

      protected void setAllowSubkeys(boolean allow)
      allow or disallow subkeys
      Parameters:
      allow - flag value

    • getReadOnly

      protected boolean getReadOnly()
      Is the Map read-only?
      Returns:
      yes/no

    • setReadOnly

      protected void setReadOnly(boolean ro)
      Set or unset read-only behaviour
      Parameters:
      ro - flag value

    • setStringsDelimiter

      protected final void setStringsDelimiter(String stringsDelimiter)
      Sets the delimiter used for separating values in a single String value. The default string delimiter is a comma.
      Parameters:
      stringsDelimiter - strings delimiter
      See Also:

    • configure

      protected void configure(ValueParser values)
      Does the actual configuration. This is protected, so subclasses may share the same ValueParser and call configure at any time, while preventing templates from doing so when configure(Map) is locked.
      Overrides:
      configure in class FormatConfig
      Parameters:
      values - configuration values

    • exists

      public boolean exists(String key)
      Convenience method for checking whether a certain parameter exists.
      Parameters:
      key - the parameter's key
      Returns:
      true if a parameter exists for the specified key; otherwise, returns false.

    • get

      public Object get(String key)
      Convenience method for use in Velocity templates. This allows for easy "dot" access to parameters. e.g. $params.foo instead of $params.getString('foo')
      Parameters:
      key - the parameter's key
      Returns:
      parameter matching the specified key or null if there is no matching parameter

    • getValue

      public Object getValue(String key)
      Returns the value mapped to the specified key in the Map returned by getSource(). If there is no source, then this will always return null.
      Parameters:
      key - property key
      Returns:
      property value, or null

    • getValue

      public Object getValue(String key, Object alternate)
      Parameters:
      key - the desired parameter's key
      alternate - The alternate value
      Returns:
      parameter matching the specified key or the specified alternate Object if there is no matching parameter

    • parseStringList

      protected String[] parseStringList(String value)

    • getValues

      public Object[] getValues(String key)

      Returns an array of values. If the internal value is a string, it is split using the configured delimitor (',' by default).

      If the internal value is not an array or is a string without any delimiter, a singletin array is returned.

      Parameters:
      key - the desired parameter's key
      Returns:
      array of values, or null of the key has not been found. specified alternate Object if there is no matching parameter

    • getString

      public String getString(String key)
      Parameters:
      key - the parameter's key
      Returns:
      parameter matching the specified key or null if there is no matching parameter

    • getString

      public String getString(String key, String alternate)
      Parameters:
      key - the desired parameter's key
      alternate - The alternate value
      Returns:
      parameter matching the specified key or the specified alternate String if there is no matching parameter

    • getBoolean

      public Boolean getBoolean(String key)
      Parameters:
      key - the desired parameter's key
      Returns:
      a Boolean object for the specified key or null if no matching parameter is found

    • getBoolean

      public boolean getBoolean(String key, boolean alternate)
      Parameters:
      key - the desired parameter's key
      alternate - The alternate boolean value
      Returns:
      boolean value for the specified key or the alternate boolean is no value is found

    • getBoolean

      public Boolean getBoolean(String key, Boolean alternate)
      Parameters:
      key - the desired parameter's key
      alternate - the alternate Boolean
      Returns:
      a Boolean for the specified key or the specified alternate if no matching parameter is found

    • getInteger

      public Integer getInteger(String key)
      Parameters:
      key - the desired parameter's key
      Returns:
      a Integer for the specified key or null if no matching parameter is found

    • getInteger

      public Integer getInteger(String key, Integer alternate)
      Parameters:
      key - the desired parameter's key
      alternate - The alternate Integer
      Returns:
      an Integer for the specified key or the specified alternate if no matching parameter is found

    • getLong

      public Long getLong(String key)
      Parameters:
      key - the desired parameter's key
      Returns:
      a Long for the specified key or null if no matching parameter is found

    • getLong

      public Long getLong(String key, Long alternate)
      Parameters:
      key - the desired parameter's key
      alternate - The alternate Long
      Returns:
      a Long for the specified key or the specified alternate if no matching parameter is found

    • getDouble

      public Double getDouble(String key)
      Parameters:
      key - the desired parameter's key
      Returns:
      a Double for the specified key or null if no matching parameter is found

    • getDouble

      public Double getDouble(String key, Double alternate)
      Parameters:
      key - the desired parameter's key
      alternate - The alternate Double
      Returns:
      an Double for the specified key or the specified alternate if no matching parameter is found

    • getNumber

      public Number getNumber(String key)
      Parameters:
      key - the desired parameter's key
      Returns:
      a Number for the specified key or null if no matching parameter is found

    • getLocale

      public Locale getLocale(String key)
      Parameters:
      key - the desired parameter's key
      Returns:
      a Locale for the specified key or null if no matching parameter is found

    • getNumber

      public Number getNumber(String key, Number alternate)
      Parameters:
      key - the desired parameter's key
      alternate - The alternate Number
      Returns:
      a Number for the specified key or the specified alternate if no matching parameter is found

    • getInt

      public int getInt(String key, int alternate)
      Parameters:
      key - the desired parameter's key
      alternate - The alternate int value
      Returns:
      the int value for the specified key or the specified alternate value if no matching parameter is found

    • getDouble

      public double getDouble(String key, double alternate)
      Parameters:
      key - the desired parameter's key
      alternate - The alternate double value
      Returns:
      the double value for the specified key or the specified alternate value if no matching parameter is found

    • getLocale

      public Locale getLocale(String key, Locale alternate)
      Parameters:
      key - the desired parameter's key
      alternate - The alternate Locale
      Returns:
      a Locale for the specified key or the specified alternate if no matching parameter is found

    • getStrings

      public String[] getStrings(String key)
      Parameters:
      key - the key for the desired parameter
      Returns:
      an array of String objects containing all of the values associated with the given key, or null if the no values are associated with the given key

    • getBooleans

      public Boolean[] getBooleans(String key)
      Parameters:
      key - the key for the desired parameter
      Returns:
      an array of Boolean objects associated with the given key.

    • getNumbers

      public Number[] getNumbers(String key)
      Parameters:
      key - the key for the desired parameter
      Returns:
      an array of Number objects associated with the given key, or null if Numbers are not associated with it.

    • getInts

      public int[] getInts(String key)
      Parameters:
      key - the key for the desired parameter
      Returns:
      an array of int values associated with the given key, or null if numbers are not associated with it.

    • getDoubles

      public double[] getDoubles(String key)
      Parameters:
      key - the key for the desired parameter
      Returns:
      an array of double values associated with the given key, or null if numbers are not associated with it.

    • getLocales

      public Locale[] getLocales(String key)
      Parameters:
      key - the key for the desired parameter
      Returns:
      an array of Locale objects associated with the given key, or null if Locales are not associated with it.

    • hasSubkeys

      public boolean hasSubkeys()
      Determines whether there are subkeys available in the source map.
      Returns:
      true if there are subkeys (key names containing a dot)

    • getSubkeys

      public Set<String> getSubkeys()
      returns the set of all possible first-level subkeys, including complete keys without dots (or returns keySet() if allowSubKeys is false)
      Returns:
      the set of all possible first-level subkeys

    • getSubkey

      public ValueParser getSubkey(String subkey)
      subkey getter that returns a map subkey#2 -> value for every "subkey.subkey2" found entry
      Parameters:
      subkey - subkey to search for
      Returns:
      the map of found values

    • size

      public int size()
      Specified by:
      size in interface Map<String,Object>

    • isEmpty

      public boolean isEmpty()
      Specified by:
      isEmpty in interface Map<String,Object>

    • containsKey

      public boolean containsKey(Object key)
      Specified by:
      containsKey in interface Map<String,Object>

    • containsValue

      public boolean containsValue(Object value)
      Specified by:
      containsValue in interface Map<String,Object>

    • get

      public Object get(Object key)
      Specified by:
      get in interface Map<String,Object>

    • put

      public Object put(String key, Object value)
      Specified by:
      put in interface Map<String,Object>

    • remove

      public Object remove(Object key)
      Specified by:
      remove in interface Map<String,Object>

    • putAll

      public void putAll(Map<? extends String,? extends Object> m)
      Specified by:
      putAll in interface Map<String,Object>

    • clear

      public void clear()
      Specified by:
      clear in interface Map<String,Object>

    • keySet

      public Set<String> keySet()
      Specified by:
      keySet in interface Map<String,Object>

    • values

      public Collection values()
      Specified by:
      values in interface Map<String,Object>

    • entrySet

      public Set<Map.Entry<String,Object>> entrySet()
      Specified by:
      entrySet in interface Map<String,Object>

    • toString

      public String toString()
      Overrides:
      toString in class Object