Examples of org.apache.commons.lang.text.StrLookup

org.apache.commons.lang.text.StrLookup
Lookup a String key to a String value.
This class represents the simplest form of a string to string map. It has a benefit over a map in that it can create the result on demand based on the key.
This class comes complete with various factory methods. If these do not suffice, you can subclass and implement your own matcher.
For example, it would be possible to implement a lookup that used the key as a primary key, and looked up the value on demand from the database @author Apache Software Foundation @since 2.2 @version $Id: StrLookup.java 905636 2010-02-02 14:03:32Z niallp $

   * @since 1.4
   */
  protected ConfigurationInterpolator createInterpolator()
  {
    ConfigurationInterpolator interpol = new ConfigurationInterpolator();
    interpol.setDefaultLookup(new StrLookup()
    {
      public String lookup(String var)
      {
        Object prop = resolveContainerStore(var);
        return (prop != null) ? prop.toString() : null;

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     * @since 1.4
     */
    protected ConfigurationInterpolator createInterpolator()
    {
        ConfigurationInterpolator interpol = new ConfigurationInterpolator();
        interpol.setDefaultLookup(new StrLookup()
        {
            public String lookup(String var)
            {
                Object prop = resolveContainerStore(var);
                return (prop != null) ? prop.toString() : null;

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        parent.addProperty("tablespaces.tablespace.name", "default");
        parent.addProperty("tablespaces.tablespace(-1).name", "test");
        parent.addProperty("tables.table(0).var", "${brackets:x}");
        
        ConfigurationInterpolator interpolator = parent.getInterpolator();
        interpolator.registerLookup("brackets", new StrLookup(){


            public String lookup(String key) {
                return "(" + key +")";
            }

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    }
    
    public void testLocalLookupsInInterpolatorAreInherited() {
        BaseConfiguration config = new BaseConfiguration();
        ConfigurationInterpolator interpolator = config.getInterpolator();
        interpolator.registerLookup("brackets", new StrLookup(){


            public String lookup(String key) {
                return "(" + key +")";
            }

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     * @param prefix the prefix
     * @return the lookup object to be used for this prefix
     */
    protected StrLookup fetchLookupForPrefix(String prefix)
    {
        StrLookup lookup = (StrLookup) localLookups.get(prefix);
        if (lookup == null)
        {
            lookup = StrLookup.noneLookup();
        }
        return lookup;

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     */
    public static void testGetInterpolator(AbstractConfiguration config)
    {
        config.addProperty("var", "${echo:testVar}");
        ConfigurationInterpolator interpol = config.getInterpolator();
        interpol.registerLookup("echo", new StrLookup()
        {
            public String lookup(String varName)
            {
                return "Value of variable " + varName;
            }

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     * @since 1.4
     */
    protected ConfigurationInterpolator createInterpolator()
    {
        ConfigurationInterpolator interpol = new ConfigurationInterpolator();
        interpol.setDefaultLookup(new StrLookup()
        {
            public String lookup(String var)
            {
                Object prop = resolveContainerStore(var);
                return (prop != null) ? prop.toString() : null;

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        for (Iterator it = nodes.iterator(); it.hasNext();)
        {
            HierarchicalConfiguration config = (HierarchicalConfiguration) it.next();
            XMLBeanDeclaration decl = new XMLBeanDeclaration(config);
            String key = config.getString(KEY_LOOKUP_KEY);
            StrLookup lookup = (StrLookup) BeanHelper.createBean(decl);
            BeanHelper.setProperty(lookup, "configuration", this);
            ConfigurationInterpolator.registerGlobalLookup(key, lookup);
            this.getInterpolator().registerLookup(key, lookup);
        }
    }

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     * @param prefix the prefix
     * @return the lookup object to be used for this prefix
     */
    protected StrLookup fetchLookupForPrefix(String prefix)
    {
        StrLookup lookup = (StrLookup) localLookups.get(prefix);
        if (lookup == null)
        {
            lookup = StrLookup.noneLookup();
        }
        return lookup;

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     * @since 1.4
     */
    protected ConfigurationInterpolator createInterpolator()
    {
        ConfigurationInterpolator interpol = new ConfigurationInterpolator();
        interpol.setDefaultLookup(new StrLookup()
        {
            public String lookup(String var)
            {
                Object prop = resolveContainerStore(var);
                return (prop != null) ? prop.toString() : null;

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