Retrieving placeholdered items from map and properties file
With IterableObjectHelper component it is possible to retrieve items from map by using place holder or not. In the following example we are going to show to how retrieve strings or objects from burningwave.properties file and from maps:
burningwave.properties:
...
code-block-1=\
${code-block-2}\
return (T)Date.from(zonedDateTime.toInstant());
code-block-1.imports=\
${code-block-2.imports}\
java.util.Date;
...package org.burningwave.core.examples.iterableobjecthelper;
import static org.burningwave.core.assembler.StaticComponentContainer.IterableObjectHelper;
import java.io.IOException;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import org.burningwave.core.assembler.ComponentContainer;
import org.burningwave.core.assembler.ComponentSupplier;
import org.burningwave.core.io.PathHelper;
public class ItemFromMapRetriever {
public void execute() throws IOException {
ComponentSupplier componentSupplier = ComponentContainer.getInstance();
PathHelper pathHelper = componentSupplier.getPathHelper();
Properties properties = new Properties();
properties.load(pathHelper.getResourceAsStream("burningwave.properties"));
String code = IterableObjectHelper.resolveStringValue(properties, "code-block-1");
Map<Object, Object> map = new HashMap<>();
map.put("class-loader-01", "${class-loader-02}");
map.put("class-loader-02", "${class-loader-03}");
map.put("class-loader-03", Thread.currentThread().getContextClassLoader().getParent());
ClassLoader parentClassLoader = IterableObjectHelper.resolveValue(map, "class-loader-01");
map.clear();
map.put("class-loaders", "${class-loader-02};${class-loader-03};");
map.put("class-loader-02", Thread.currentThread().getContextClassLoader());
map.put("class-loader-03", Thread.currentThread().getContextClassLoader().getParent());
Collection<ClassLoader> classLoaders = IterableObjectHelper.resolveValues(map, "class-loaders", ";");
}
public static void main(String[] args) throws IOException {
new ItemFromMapRetriever().execute();
}
}ClassFactory
ClassHunter
- In depth look to and configuration guide
- USE CASE: retrieving all classes of the classpath
- USE CASE: retrieving all classes that implement one or more interfaces
- USE CASE: finding all classes that extend a base class
- USE CASE: searching for all classes that have package name that matches a regex
- USE CASE: finding all classes for module name (Java 9 and later)
- USE CASE: finding all annotated classes
- USE CASE: how to scan classes for specific annotations and collect its values
- USE CASE: searching for all classes with a constructor that takes a specific type as first parameter and with at least 2 methods that begin for a given string
- USE CASE: searching for all classes with methods whose name begins for a given string and that takes a specific type as its first parameter
- USE CASE: finding all classes that have at least 2 protected fields