/*
 * Copyright (C) 2012-2019 The Project Lombok Authors.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package lombok.eclipse.agent;

public class PatchDiagnostics {
	
org.eclipse.jdt.core.dom.ASTNode#setSourceRange starts off doing some sanity checks on the input arguments, and, if these fail the sanity check, a IllegalArgumentException is thrown. However, these IAEs do not have any message and are thus pretty much useless. We do the exact same checks, and throw the exact same exception (thus, effectively, we don't change how eclipse operates), but, we do provide a useful message.
/**
	 * 
	 * org.eclipse.jdt.core.dom.ASTNode#setSourceRange starts off doing some sanity checks on the input arguments, and, if these fail the sanity check,
	 * a {@code IllegalArgumentException} is thrown. However, these IAEs do not have any message and are thus pretty much useless. We do the exact same
	 * checks, and throw the exact same exception (thus, effectively, we don't change how eclipse operates), but, we <em>do</em> provide a useful message.
	 */
	public static boolean setSourceRangeCheck(Object astNode, int startPosition, int length) {
		String nodeTxt;
		if (startPosition >= 0 && length < 0) {
			if (astNode == null) nodeTxt = "(NULL NODE)";
			else nodeTxt = astNode.getClass() + ": " + astNode.toString();
			throw new IllegalArgumentException("startPos = " + startPosition + " and length is " + length + ".\n" +
				"This breaks the rule that lengths are not allowed to be negative. Affected Node:\n" + nodeTxt);
		}
		
		if (startPosition < 0 && length != 0) {
			if (astNode == null) nodeTxt = "(NULL NODE)";
			else nodeTxt = astNode.getClass() + ": " + astNode.toString();
			throw new IllegalArgumentException("startPos = " + startPosition + " and length is " + length + ".\n" +
				"This breaks the rule that length must be 0 if startPosition is negative. Affected Node:\n" + nodeTxt);
		}
		
		return false;
	}
}