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/*
 * 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.activemq.artemis.utils;

import org.apache.activemq.artemis.core.config.impl.Validators;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class XMLConfigurationUtil {

   public static final String getAttributeValue(Node element, String attribute) {
      return element.getAttributes().getNamedItem(attribute).getNodeValue();
   }

   public static final String getTrimmedTextContent(Node element) {
      String content = element.getTextContent();
      if (content == null)
         return null;
      return content.trim();
   }

   public static final Double getDouble(final Element e,
                                        final String name,
                                        final double def,
                                        final Validators.Validator validator) {
      NodeList nl = e.getElementsByTagName(name);
      if (nl.getLength() > 0) {
         double val = XMLUtil.parseDouble(nl.item(0));
         validator.validate(name, val);
         return val;
      }
      else {
         validator.validate(name, def);
         return def;
      }
   }

   public static final String getString(final Element e,
                                        final String name,
                                        final String def,
                                        final Validators.Validator validator) {
      NodeList nl = e.getElementsByTagName(name);
      if (nl.getLength() > 0) {
         String val = nl.item(0).getTextContent().trim();
         validator.validate(name, val);
         return val;
      }
      else {
         validator.validate(name, def);
         return def;
      }
   }

   public static final Long getLong(final Element e,
                                    final String name,
                                    final long def,
                                    final Validators.Validator validator) {
      NodeList nl = e.getElementsByTagName(name);
      if (nl.getLength() > 0) {
         long val = XMLUtil.parseLong(nl.item(0));
         validator.validate(name, val);
         return val;
      }
      else {
         validator.validate(name, def);
         return def;
      }
   }

   public static final Integer getInteger(final Element e,
                                          final String name,
                                          final int def,
                                          final Validators.Validator validator) {
      NodeList nl = e.getElementsByTagName(name);
      if (nl.getLength() > 0) {
         int val = XMLUtil.parseInt(nl.item(0));
         validator.validate(name, val);
         return val;
      }
      else {
         validator.validate(name, def);
         return def;
      }
   }

   public static final Boolean getBoolean(final Element e, final String name, final boolean def) {
      NodeList nl = e.getElementsByTagName(name);
      if (nl.getLength() > 0) {
         return XMLUtil.parseBoolean(nl.item(0));
      }
      else {
         return def;
      }
   }

   public static final Boolean parameterExists(final Element e, final String name) {
      NodeList nl = e.getElementsByTagName(name);
      if (nl.getLength() > 0) {
         return true;
      }
      else {
         return false;
      }
   }
}