TransformImpl.java

/**
 * <copyright>
 * </copyright>
 *
 * $Id$
 */
package org.eclipse.buckminster.rmap.impl;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.eclipse.buckminster.rmap.RmapPackage;
import org.eclipse.buckminster.rmap.Transform;
import org.eclipse.buckminster.rmap.util.TransformMismatchException;

import org.eclipse.emf.common.notify.Notification;

import org.eclipse.emf.ecore.EClass;

import org.eclipse.emf.ecore.impl.ENotificationImpl;
import org.eclipse.emf.ecore.impl.EObjectImpl;

/**
 * <!-- begin-user-doc --> An implementation of the model object '
 * <em><b>Transform</b></em>'. <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * <ul>
 * <li>{@link org.eclipse.buckminster.rmap.impl.TransformImpl#getFromPattern
 * <em>From Pattern</em>}</li>
 * <li>
 * {@link org.eclipse.buckminster.rmap.impl.TransformImpl#getFromReplacement
 * <em>From Replacement</em>}</li>
 * <li>{@link org.eclipse.buckminster.rmap.impl.TransformImpl#getToPattern <em>
 * To Pattern</em>}</li>
 * <li>{@link org.eclipse.buckminster.rmap.impl.TransformImpl#getToReplacement
 * <em>To Replacement</em>}</li>
 * </ul>
 * </p>
 * 
 * @generated
 */
public class TransformImpl extends EObjectImpl implements Transform {
	/**
	 * The default value of the '{@link #getFromPattern() <em>From Pattern</em>}
	 * ' attribute. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @see #getFromPattern()
	 * @generated
	 * @ordered
	 */
	protected static final Pattern FROM_PATTERN_EDEFAULT = null;

	private static String replace(String source, Pattern pattern, String replacement) {
		Matcher matcher = pattern.matcher(source);
		if (matcher.find()) {
			StringBuffer sb = new StringBuffer();
			do {
				matcher.appendReplacement(sb, replacement);
			} while (matcher.find());
			matcher.appendTail(sb);
			return sb.toString();
		}
		return null;
	}

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

	/**
	 * The default value of the '{@link #getFromReplacement()
	 * <em>From Replacement</em>}' attribute. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @see #getFromReplacement()
	 * @generated
	 * @ordered
	 */
	protected static final String FROM_REPLACEMENT_EDEFAULT = null;

	/**
	 * The cached value of the '{@link #getFromReplacement()
	 * <em>From Replacement</em>}' attribute. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @see #getFromReplacement()
	 * @generated
	 * @ordered
	 */
	protected String fromReplacement = FROM_REPLACEMENT_EDEFAULT;

	/**
	 * The default value of the '{@link #getToPattern() <em>To Pattern</em>}'
	 * attribute. <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @see #getToPattern()
	 * @generated
	 * @ordered
	 */
	protected static final Pattern TO_PATTERN_EDEFAULT = null;

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

	/**
	 * The default value of the '{@link #getToReplacement()
	 * <em>To Replacement</em>}' attribute. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @see #getToReplacement()
	 * @generated
	 * @ordered
	 */
	protected static final String TO_REPLACEMENT_EDEFAULT = null;

	/**
	 * The cached value of the '{@link #getToReplacement()
	 * <em>To Replacement</em>}' attribute. <!-- begin-user-doc --> <!--
	 * end-user-doc -->
	 * 
	 * @see #getToReplacement()
	 * @generated
	 * @ordered
	 */
	protected String toReplacement = TO_REPLACEMENT_EDEFAULT;

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

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public Object eGet(int featureID, boolean resolve, boolean coreType) {
		switch (featureID) {
			case RmapPackage.TRANSFORM__FROM_PATTERN:
				return getFromPattern();
			case RmapPackage.TRANSFORM__FROM_REPLACEMENT:
				return getFromReplacement();
			case RmapPackage.TRANSFORM__TO_PATTERN:
				return getToPattern();
			case RmapPackage.TRANSFORM__TO_REPLACEMENT:
				return getToReplacement();
		}
		return super.eGet(featureID, resolve, coreType);
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public boolean eIsSet(int featureID) {
		switch (featureID) {
			case RmapPackage.TRANSFORM__FROM_PATTERN:
				return FROM_PATTERN_EDEFAULT == null ? fromPattern != null : !FROM_PATTERN_EDEFAULT.equals(fromPattern);
			case RmapPackage.TRANSFORM__FROM_REPLACEMENT:
				return FROM_REPLACEMENT_EDEFAULT == null ? fromReplacement != null : !FROM_REPLACEMENT_EDEFAULT.equals(fromReplacement);
			case RmapPackage.TRANSFORM__TO_PATTERN:
				return TO_PATTERN_EDEFAULT == null ? toPattern != null : !TO_PATTERN_EDEFAULT.equals(toPattern);
			case RmapPackage.TRANSFORM__TO_REPLACEMENT:
				return TO_REPLACEMENT_EDEFAULT == null ? toReplacement != null : !TO_REPLACEMENT_EDEFAULT.equals(toReplacement);
		}
		return super.eIsSet(featureID);
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public void eSet(int featureID, Object newValue) {
		switch (featureID) {
			case RmapPackage.TRANSFORM__FROM_PATTERN:
				setFromPattern((Pattern) newValue);
				return;
			case RmapPackage.TRANSFORM__FROM_REPLACEMENT:
				setFromReplacement((String) newValue);
				return;
			case RmapPackage.TRANSFORM__TO_PATTERN:
				setToPattern((Pattern) newValue);
				return;
			case RmapPackage.TRANSFORM__TO_REPLACEMENT:
				setToReplacement((String) newValue);
				return;
		}
		super.eSet(featureID, newValue);
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public void eUnset(int featureID) {
		switch (featureID) {
			case RmapPackage.TRANSFORM__FROM_PATTERN:
				setFromPattern(FROM_PATTERN_EDEFAULT);
				return;
			case RmapPackage.TRANSFORM__FROM_REPLACEMENT:
				setFromReplacement(FROM_REPLACEMENT_EDEFAULT);
				return;
			case RmapPackage.TRANSFORM__TO_PATTERN:
				setToPattern(TO_PATTERN_EDEFAULT);
				return;
			case RmapPackage.TRANSFORM__TO_REPLACEMENT:
				setToReplacement(TO_REPLACEMENT_EDEFAULT);
				return;
		}
		super.eUnset(featureID);
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public Pattern getFromPattern() {
		return fromPattern;
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public String getFromReplacement() {
		return fromReplacement;
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public Pattern getToPattern() {
		return toPattern;
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public String getToReplacement() {
		return toReplacement;
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public void setFromPattern(Pattern newFromPattern) {
		Pattern oldFromPattern = fromPattern;
		fromPattern = newFromPattern;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, RmapPackage.TRANSFORM__FROM_PATTERN, oldFromPattern, fromPattern));
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public void setFromReplacement(String newFromReplacement) {
		String oldFromReplacement = fromReplacement;
		fromReplacement = newFromReplacement;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, RmapPackage.TRANSFORM__FROM_REPLACEMENT, oldFromReplacement, fromReplacement));
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public void setToPattern(Pattern newToPattern) {
		Pattern oldToPattern = toPattern;
		toPattern = newToPattern;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, RmapPackage.TRANSFORM__TO_PATTERN, oldToPattern, toPattern));
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public void setToReplacement(String newToReplacement) {
		String oldToReplacement = toReplacement;
		toReplacement = newToReplacement;
		if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, RmapPackage.TRANSFORM__TO_REPLACEMENT, oldToReplacement, toReplacement));
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	public String toString() {
		if (eIsProxy())
			return super.toString();

		StringBuffer result = new StringBuffer(super.toString());
		result.append(" (fromPattern: ");
		result.append(fromPattern);
		result.append(", fromReplacement: ");
		result.append(fromReplacement);
		result.append(", toPattern: ");
		result.append(toPattern);
		result.append(", toReplacement: ");
		result.append(toReplacement);
		result.append(')');
		return result.toString();
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated NOT
	 */
	@Override
	public String transformFrom(String source) throws TransformMismatchException {
		return transform(source, fromPattern, fromReplacement, toPattern, toReplacement);
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated NOT
	 */
	@Override
	public String transformTo(String source) throws TransformMismatchException {
		return transform(source, toPattern, toReplacement, fromPattern, fromReplacement);
	}

	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * 
	 * @generated
	 */

	@Override
	protected EClass eStaticClass() {
		return RmapPackage.Literals.TRANSFORM;
	}

	private String transform(String source, Pattern pattern, String replacement, Pattern reversePattern, String reverseReplacement)
			throws TransformMismatchException {
		String result = replace(source, pattern, replacement);
		if (result == null)
			return null;

		String reverse = replace(result, reversePattern, reverseReplacement);
		if (reverse == null)
			//
			// Matches only one direction. Don't replace then.
			//
			return null;

		// This pattern was possible to replace in both directions. The result
		// should
		// be the same in that case.
		//
		if (source.equals(reverse))
			return result;

		throw new TransformMismatchException(this);
	}

} // TransformImpl