com.orientechnologies.orient.core.config.OContextConfiguration Maven / Gradle / Ivy

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/*
 *
 *  *  Copyright 2010-2016 OrientDB LTD (http://orientdb.com)
 *  *
 *  *  Licensed 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.
 *  *
 *  * For more information: http://orientdb.com
 *
 */
package com.orientechnologies.orient.core.config;

import java.io.Serializable;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * Represents a context configuration where custom setting could be defined for the context only. If
 * not defined, globals will be taken.
 *
 * @author Luca Garulli (l.garulli--(at)--orientdb.com)
 */
public class OContextConfiguration implements Serializable {
  private final Map config = new ConcurrentHashMap();

  /**
   * Empty constructor to create just a proxy for the OGlobalConfiguration. No values are setted.
   */
  public OContextConfiguration() {}

  /**
   * Initializes the context with custom parameters.
   *
   * @param iConfig Map of parameters of type Map.
   */
  public OContextConfiguration(final Map iConfig) {
    this.config.putAll(iConfig);
  }

  public OContextConfiguration(final OContextConfiguration iParent) {
    if (iParent != null) config.putAll(iParent.config);
  }

  public Object setValue(final OGlobalConfiguration iConfig, final Object iValue) {
    if (iValue == null) return config.remove(iConfig.getKey());

    return config.put(iConfig.getKey(), iValue);
  }

  public Object setValue(final String iName, final Object iValue) {
    if (iValue == null) return config.remove(iName);

    return config.put(iName, iValue);
  }

  public Object getValue(final OGlobalConfiguration iConfig) {
    if (config != null && config.containsKey(iConfig.getKey())) return config.get(iConfig.getKey());
    return iConfig.getValue();
  }

  /**
   * @param config Global configuration parameter.
   * @return Value of configuration parameter stored in this context as enumeration if such one
   *     exists, otherwise value stored in passed in {@link OGlobalConfiguration} instance.
   * @throws ClassCastException if stored value can not be casted and parsed from string to passed
   *     in enumeration class.
   * @throws IllegalArgumentException if value associated with configuration parameter is a string
   *     bug can not be converted to instance of passed in enumeration class.
   */
  public > T getValueAsEnum(
      final OGlobalConfiguration config, Class enumType) {
    final Object value;
    if (this.config != null && this.config.containsKey(config.getKey())) {
      value = this.config.get(config.getKey());
    } else {
      value = config.getValue();
    }

    if (value == null) return null;

    if (enumType.isAssignableFrom(value.getClass())) {
      return enumType.cast(value);
    } else if (value instanceof String) {
      final String presentation = value.toString();
      return Enum.valueOf(enumType, presentation);
    } else {
      throw new ClassCastException(
          "Value " + value + " can not be cast to enumeration " + enumType.getSimpleName());
    }
  }

  @SuppressWarnings("unchecked")
  public  T getValue(final String iName, final T iDefaultValue) {
    if (config != null && config.containsKey(iName)) return (T) config.get(iName);

    final String sysProperty = System.getProperty(iName);
    if (sysProperty != null) return (T) sysProperty;

    return iDefaultValue;
  }

  public boolean getValueAsBoolean(final OGlobalConfiguration iConfig) {
    final Object v = getValue(iConfig);
    if (v == null) return false;
    return v instanceof Boolean ? ((Boolean) v).booleanValue() : Boolean.parseBoolean(v.toString());
  }

  public String getValueAsString(final String iName, final String iDefaultValue) {
    return getValue(iName, iDefaultValue);
  }

  public String getValueAsString(final OGlobalConfiguration iConfig) {
    final Object v = getValue(iConfig);
    if (v == null) return null;
    return v.toString();
  }

  public int getValueAsInteger(final OGlobalConfiguration iConfig) {
    final Object v = getValue(iConfig);
    if (v == null) return 0;
    return v instanceof Integer ? ((Integer) v).intValue() : Integer.parseInt(v.toString());
  }

  public long getValueAsLong(final OGlobalConfiguration iConfig) {
    final Object v = getValue(iConfig);
    if (v == null) return 0;
    return v instanceof Long ? ((Long) v).intValue() : Long.parseLong(v.toString());
  }

  public float getValueAsFloat(final OGlobalConfiguration iConfig) {
    final Object v = getValue(iConfig);
    if (v == null) return 0;
    return v instanceof Float ? ((Float) v).floatValue() : Float.parseFloat(v.toString());
  }

  public int getContextSize() {
    return config.size();
  }

  public java.util.Set getContextKeys() {
    return config.keySet();
  }

  public void merge(OContextConfiguration contextConfiguration) {
    this.config.putAll(contextConfiguration.config);
  }
}