tobago-core/src/main/java/org/apache/myfaces/tobago/internal/component/AbstractUIDate.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.myfaces.tobago.internal.component;

import org.apache.myfaces.tobago.internal.util.DateFormatUtils;
import org.apache.myfaces.tobago.util.ComponentUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.DateTimeConverter;
import java.lang.invoke.MethodHandles;
import java.util.Date;

/**
 * {@link org.apache.myfaces.tobago.internal.taglib.component.DateTagDeclaration}
 */
public abstract class AbstractUIDate extends AbstractUIInput {

  private static final Logger LOG = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

  public abstract String getPlaceholder();

  public String getPattern() {
    final FacesContext facesContext = getFacesContext();
    Converter converter = ComponentUtils.getConverter(facesContext, this, getSubmittedValue());
    if (!(converter instanceof DateTimeConverter)) {
      // hack for prototyping, if there is no value behind the component.
      converter = facesContext.getApplication().createConverter(Date.class);
      if (LOG.isWarnEnabled()) {
        LOG.warn("Can't find a converter to get a pattern in component {}! Using default.",
            getClientId(facesContext));
      }
    }
    return DateFormatUtils.findPattern((DateTimeConverter) converter);
  }

  public abstract boolean isTodayButton();
}