Parameterisierter Validator Tag#

SomeValidator.java

import javax.el.ValueExpression;
import javax.faces.application.FacesMessage;
import javax.faces.component.StateHolder;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;

public class SomeValidator implements Validator, Stateholder {
  private ValueExpression type;
  private boolean transientValue;
  
  public ValueExpression getType() {
    return type;
  }
  public void setType(ValueExpression type) {
    this.type = type;
  }
  
  @Override
  public Object saveState(FacesContext context) {
    Object values[] = new Object[1];
    values[0] = type;
    return values;
  }
  @Override
  public void restoreState(FacesContext context, Object state) {
    Object[] values = (Object[])state;
    type = (ValueExpression)values[0];
  }
  @Override
  public boolean isTransient() {
    return transientValue;
  }
  @Override
  public void setTransient(boolean transientValue) {
    this.transientValue = transientValue;
  }
  
  @Override
  public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException {
      ...
  }
}

SomeValidatorHandler.java

public class SomeValidatorHandler extends ValidateHandler {
  private TagAttribute type;

  public SomeValidatorHandler(ValidatorConfig config) {
    super(config);
    type = getRequiredAttribute("type");
  }

  @Override
  protected Validator createValidator(FaceletContext context) {
    SomeValidator validator = (SomeValidator)context.getFacesContext().getApplication().createValidator(
        "intersult.some");
    if (type != null)
      validator.setType(type.getValueExpression(context, QueryType.class));
    return validator;
  }

  @Override
  protected MetaRuleset createMetaRuleset(Class type) {
    return super.createMetaRuleset(type).ignoreAll();
  }
}

faces-config.xml

  <validator>
  	<validator-id>intersult.some</validator-id>
  	<validator-class>com.intersult.SomeValidator</validator-class>
  </validator>

intersult.taglib.xml

	<tag>
		<tag-name>SomeValidator</tag-name>
		<validator>
			<validator-id>intersult.some</validator-id>
			<handler-class>com.intersult.SomeValidatorHandler</handler-class>
		</validator>
	</tag>

intersult.tld

	<tag>
		<name>SomeValidator</name>
		<tag-class/>
		<body-content>empty</body-content>
		<attribute>
			<name>type</name>
		</attribute>
	</tag>