/*
 * Copyright (c) 2014, 2015 Eike Stepper (Loehne, Germany) and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v20.html
 *
 * Contributors:
 *    Eike Stepper - initial API and implementation
 */
package org.eclipse.oomph.predicates.impl;

import org.eclipse.oomph.predicates.LocationPredicate;
import org.eclipse.oomph.predicates.PredicatesPackage;

import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.impl.ENotificationImpl;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IPath;

import java.util.regex.Pattern;

/**
 * <!-- begin-user-doc -->
 * An implementation of the model object '<em><b>Location Predicate</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * </p>
 * <ul>
 *   <li>{@link org.eclipse.oomph.predicates.impl.LocationPredicateImpl#getPattern <em>Pattern</em>}</li>
 * </ul>
 *
 * @generated
 */
public class LocationPredicateImpl extends PredicateImpl implements LocationPredicate
{
  /**
   * The default value of the '{@link #getPattern() <em>Pattern</em>}' attribute.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #getPattern()
   * @generated
   * @ordered
   */
  protected static final String PATTERN_EDEFAULT = null;

  /**
   * The cached value of the '{@link #getPattern() <em>Pattern</em>}' attribute.
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @see #getPattern()
   * @generated
   * @ordered
   */
  protected String pattern = PATTERN_EDEFAULT;

  private Pattern compiledPattern;

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  protected LocationPredicateImpl()
  {
    super();
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  @Override
  protected EClass eStaticClass()
  {
    return PredicatesPackage.Literals.LOCATION_PREDICATE;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public String getPattern()
  {
    return pattern;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  public void setPatternGen(String newPattern)
  {
    String oldPattern = pattern;
    pattern = newPattern;
    if (eNotificationRequired())
    {
      eNotify(new ENotificationImpl(this, Notification.SET, PredicatesPackage.LOCATION_PREDICATE__PATTERN, oldPattern, pattern));
    }
  }

  public void setPattern(String newPattern)
  {
    setPatternGen(newPattern);
    compiledPattern = null;
  }

  private Pattern getCompiledPattern()
  {
    if (compiledPattern == null)
    {
      compiledPattern = getPattern(getPattern());
    }

    return compiledPattern;
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  @Override
  public Object eGet(int featureID, boolean resolve, boolean coreType)
  {
    switch (featureID)
    {
      case PredicatesPackage.LOCATION_PREDICATE__PATTERN:
        return getPattern();
    }
    return super.eGet(featureID, resolve, coreType);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  @Override
  public void eSet(int featureID, Object newValue)
  {
    switch (featureID)
    {
      case PredicatesPackage.LOCATION_PREDICATE__PATTERN:
        setPattern((String)newValue);
        return;
    }
    super.eSet(featureID, newValue);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  @Override
  public void eUnset(int featureID)
  {
    switch (featureID)
    {
      case PredicatesPackage.LOCATION_PREDICATE__PATTERN:
        setPattern(PATTERN_EDEFAULT);
        return;
    }
    super.eUnset(featureID);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  @Override
  public boolean eIsSet(int featureID)
  {
    switch (featureID)
    {
      case PredicatesPackage.LOCATION_PREDICATE__PATTERN:
        return PATTERN_EDEFAULT == null ? pattern != null : !PATTERN_EDEFAULT.equals(pattern);
    }
    return super.eIsSet(featureID);
  }

  /**
   * <!-- begin-user-doc -->
   * <!-- end-user-doc -->
   * @generated
   */
  @Override
  public String toString()
  {
    if (eIsProxy())
    {
      return super.toString();
    }

    StringBuffer result = new StringBuffer(super.toString());
    result.append(" (pattern: ");
    result.append(pattern);
    result.append(')');
    return result.toString();
  }

  @Override
  public boolean matches(IResource resource)
  {
    if (resource != null)
    {
      IPath location = resource.getLocation();
      if (location != null)
      {
        return getCompiledPattern().matcher(location.toPortableString()).matches();
      }
    }

    return false;
  }

} // LocationPredicateImpl