XMLAutomaticMergeResolvingRule.java example

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openflexo-master
/*
 * (c) Copyright 2010-2011 AgileBirds
 *
 * This file is part of OpenFlexo.
 *
 * OpenFlexo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * OpenFlexo is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenFlexo. If not, see <http://www.gnu.org/licenses/>.
 *
 */
package org.openflexo.fps.automerge;

import java.awt.Point;
import java.util.logging.Logger;

import org.openflexo.diff.DiffSource;
import org.openflexo.diff.merge.AbstractAutomaticMergeResolvingRule;
import org.openflexo.diff.merge.MergeChange;
import org.openflexo.xmlcode.StringEncoder;

public abstract class XMLAutomaticMergeResolvingRule extends AbstractAutomaticMergeResolvingRule {
	private static final Logger logger = Logger.getLogger(XMLAutomaticMergeResolvingRule.class.getPackage().getName());

	private static final String QUOTE = "\"";

	public static boolean isXMLAttributeValueConflict(MergeChange change, String attributeName) {
		try {
			if (change.getFirst0() == change.getLast0() && change.getFirst2() == change.getLast2()) {
				if (relativeLeftTokenAt(change, -3).equals(attributeName) && relativeLeftTokenAt(change, -2).equals("=")
						&& relativeLeftTokenAt(change, -1).equals(QUOTE) && relativeLeftTokenAt(change, 1).equals(QUOTE)
						&& relativeRightTokenAt(change, -3).equals(attributeName) && relativeRightTokenAt(change, -2).equals("=")
						&& relativeRightTokenAt(change, -1).equals(QUOTE) && relativeRightTokenAt(change, 1).equals(QUOTE)) {
					return true;
				}
			}
		} catch (IndexOutOfBoundsException e) {
			// Return false
		}
		return false;
	}

	public static boolean isXMLValueConflict(MergeChange change, String elementName) {
		try {
			if (change.getFirst0() == change.getLast0() && change.getFirst2() == change.getLast2()) {

				if (relativeLeftTokenAt(change, -3).equals("<") && relativeLeftTokenAt(change, -2).equals(elementName)
						&& relativeLeftTokenAt(change, -1).equals(">") && relativeLeftTokenAt(change, 1).equals("<")
						&& relativeLeftTokenAt(change, 2).equals("/") && relativeLeftTokenAt(change, 3).equals(elementName)
						&& relativeLeftTokenAt(change, 4).equals(">") && relativeRightTokenAt(change, -3).equals("<")
						&& relativeRightTokenAt(change, -2).equals(elementName) && relativeRightTokenAt(change, -1).equals(">")
						&& relativeRightTokenAt(change, 1).equals("<") && relativeRightTokenAt(change, 2).equals("/")
						&& relativeRightTokenAt(change, 3).equals(elementName) && relativeRightTokenAt(change, 4).equals(">")) {
					return true;
				}
			}
		} catch (IndexOutOfBoundsException e) {
			// Return false
		}
		return false;
	}

	public static boolean isInsideAnXMLAttributeValueConflict(MergeChange change, String attributeName) {
		if (extractContainerAttributeValueFromLeft(change, attributeName) == null) {
			return false;
		}
		if (extractContainerAttributeValueFromRight(change, attributeName) == null) {
			return false;
		}
		return true;
	}

	protected static String extractContainerAttributeValueFromLeft(MergeChange change, String attributeName) {
		int startTokenRelativeIndex = 0;
		boolean startIndexFound = false;
		while (!startIndexFound) {
			try {
				if (relativeLeftTokenAt(change, startTokenRelativeIndex).equals(QUOTE)) {
					startIndexFound = true;
				} else {
					startTokenRelativeIndex--;
				}
			} catch (IndexOutOfBoundsException e) {
				return null;
			}
		}

		int endTokenRelativeIndex = 0;
		boolean endIndexFound = false;
		while (!endIndexFound) {
			try {
				if (relativeLeftTokenAt(change, endTokenRelativeIndex).equals(QUOTE)) {
					endIndexFound = true;
				} else {
					endTokenRelativeIndex++;
				}
			} catch (IndexOutOfBoundsException e) {
				return null;
			}
		}

		try {
			if (relativeLeftTokenAt(change, startTokenRelativeIndex - 2).equals(attributeName)
					&& relativeLeftTokenAt(change, startTokenRelativeIndex - 1).equals("=")) {

				StringBuffer sb = new StringBuffer();
				DiffSource leftSource = change.getMerge().getLeftSource();
				for (int i = startTokenRelativeIndex + 1; i < endTokenRelativeIndex; i++) {
					sb.append(leftSource.tokenAt(change.getFirst0() + i).getFullString());
				}
				// logger.info("extractContainerAttributeValueFromLeft="+sb.toString());
				return sb.toString();
			}
		} catch (IndexOutOfBoundsException e) {
			return null;
		}

		return null;
	}

	protected static String extractContainerAttributeValueFromRight(MergeChange change, String attributeName) {
		int startTokenRelativeIndex = 0;
		boolean startIndexFound = false;
		while (!startIndexFound) {
			try {
				if (relativeRightTokenAt(change, startTokenRelativeIndex).equals(QUOTE)) {
					startIndexFound = true;
				} else {
					startTokenRelativeIndex--;
				}
			} catch (IndexOutOfBoundsException e) {
				return null;
			}
		}

		int endTokenRelativeIndex = 0;
		boolean endIndexFound = false;
		while (!endIndexFound) {
			try {
				if (relativeRightTokenAt(change, endTokenRelativeIndex).equals(QUOTE)) {
					endIndexFound = true;
				} else {
					endTokenRelativeIndex++;
				}
			} catch (IndexOutOfBoundsException e) {
				return null;
			}
		}

		try {
			if (relativeRightTokenAt(change, startTokenRelativeIndex - 2).equals(attributeName)
					&& relativeRightTokenAt(change, startTokenRelativeIndex - 1).equals("=")) {

				StringBuffer sb = new StringBuffer();
				DiffSource rightSource = change.getMerge().getRightSource();
				for (int i = startTokenRelativeIndex + 1; i < endTokenRelativeIndex; i++) {
					sb.append(rightSource.tokenAt(change.getFirst2() + i).getFullString());
				}
				// logger.info("extractContainerAttributeValueFromRight="+sb.toString());
				return sb.toString();
			}
		} catch (IndexOutOfBoundsException e) {
			return null;
		}

		return null;
	}

	public int getLeftIntAttributeValue(MergeChange change) {
		return StringEncoder.decodeAsInteger(relativeLeftTokenAt(change, 0));
	}

	public int getRightIntAttributeValue(MergeChange change) {
		return StringEncoder.decodeAsInteger(relativeRightTokenAt(change, 0));
	}

	public Point getRightPointAttributeValue(MergeChange change) {
		return StringEncoder.decodeObject(relativeRightTokenAt(change, 0), Point.class);
	}

	public Point getLeftPointAttributeValue(MergeChange change) {
		return StringEncoder.decodeObject(relativeLeftTokenAt(change, 0), Point.class);
	}

}