How to use

createExpressionContext

method

in

org.apache.shindig.config.ExpressionContainerConfig

@Override
public Object getProperty(String container, String property) {
 if (property.startsWith("${")) {
  // An expression!
  try {
   ValueExpression expression = expressions.parse(property, Object.class);
   return expression.getValue(createExpressionContext(container));
  } catch (ELException e) {
   return null;
  }
 }
 return super.getProperty(container, property);
}

@Override
public Object getProperty(String container, String property) {
 if (property.startsWith("${")) {
  // An expression!
  try {
   ValueExpression expression = expressions.parse(property, Object.class);
   return expression.getValue(createExpressionContext(container));
  } catch (ELException e) {
   return null;
  }
 }
 return super.getProperty(container, property);
}

@Override
public Object getProperty(String container, String property) {
 if (property.startsWith("${")) {
  // An expression!
  try {
   ValueExpression expression = expressions.parse(property, Object.class);
   return expression.getValue(createExpressionContext(container));
  } catch (ELException e) {
   return null;
  }
 }
 return super.getProperty(container, property);
}

@Override
@SuppressWarnings("unchecked")
protected void changeContainersInConfig(BasicContainerConfig config,
  Map<String, Map<String, Object>> setContainers, Set<String> removeContainers)
  throws ContainerConfigException {
 ExpressionContainerConfig tmp = (ExpressionContainerConfig) config;
 tmp.rawConfig.putAll(setContainers);
 for (String container : removeContainers) {
  tmp.rawConfig.remove(container);
 }
 tmp.config.clear();
 for (String container : tmp.rawConfig.keySet()) {
  Map<String, Object> merged = mergeParents(container, tmp.rawConfig);
  tmp.rawConfig.put(container, merged);
  Map<String, Object> value =
    (Map<String, Object>) parseAll(merged, tmp.createExpressionContext(container));
  tmp.config.put(container, value);
 }
 for (String container : tmp.config.keySet()) {
  Map<String, Object> value = (Map<String, Object>) evaluateAll(tmp.config.get(container));
  tmp.config.put(container, value);
 }
}

@Override
@SuppressWarnings("unchecked")
protected void changeContainersInConfig(BasicContainerConfig config,
  Map<String, Map<String, Object>> setContainers, Set<String> removeContainers)
  throws ContainerConfigException {
 ExpressionContainerConfig tmp = (ExpressionContainerConfig) config;
 tmp.rawConfig.putAll(setContainers);
 for (String container : removeContainers) {
  tmp.rawConfig.remove(container);
 }
 tmp.config.clear();
 for (String container : tmp.rawConfig.keySet()) {
  Map<String, Object> merged = mergeParents(container, tmp.rawConfig);
  tmp.rawConfig.put(container, merged);
  Map<String, Object> value =
    (Map<String, Object>) parseAll(merged, tmp.createExpressionContext(container));
  tmp.config.put(container, value);
 }
 for (String container : tmp.config.keySet()) {
  Map<String, Object> value = (Map<String, Object>) evaluateAll(tmp.config.get(container));
  tmp.config.put(container, value);
 }
}

@Override
@SuppressWarnings("unchecked")
protected void changeContainersInConfig(BasicContainerConfig config,
  Map<String, Map<String, Object>> setContainers, Set<String> removeContainers)
  throws ContainerConfigException {
 ExpressionContainerConfig tmp = (ExpressionContainerConfig) config;
 tmp.rawConfig.putAll(setContainers);
 for (String container : removeContainers) {
  tmp.rawConfig.remove(container);
 }
 tmp.config.clear();
 for (String container : tmp.rawConfig.keySet()) {
  Map<String, Object> merged = mergeParents(container, tmp.rawConfig);
  tmp.rawConfig.put(container, merged);
  Map<String, Object> value =
    (Map<String, Object>) parseAll(merged, tmp.createExpressionContext(container));
  tmp.config.put(container, value);
 }
 for (String container : tmp.config.keySet()) {
  Map<String, Object> value = (Map<String, Object>) evaluateAll(tmp.config.get(container));
  tmp.config.put(container, value);
 }
}