MethodSignatureAnalyzer.java

/*******************************************************************************
 * Copyright (c) 2025 Carsten Hammer.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Carsten Hammer
 *******************************************************************************/
package org.sandbox.jdt.internal.corext.fix.helper.lib;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jdt.core.dom.MethodDeclaration;
import org.eclipse.jdt.core.dom.SingleVariableDeclaration;

/**
 * Method Signature Analyzer - Analyzes and compares method signatures
 * 
 * This class helps determine if methods have compatible signatures
 * that could be unified through refactoring.
 */
public class MethodSignatureAnalyzer {
	
	/**
	 * Analyze a method signature
	 * 
	 * @param method The method to analyze
	 */
	public static void analyzeSignature(MethodDeclaration method) {
		// TODO: Implement signature analysis
		// Extract:
		// - Method name
		// - Parameter types
		// - Return type
		// - Access modifiers
		// - Throws clauses
	}
	
	/**
	 * Check if two method signatures are compatible
	 * 
	 * @param method1 First method
	 * @param method2 Second method
	 * @return true if signatures are compatible for refactoring
	 */
	public static boolean areCompatible(MethodDeclaration method1, MethodDeclaration method2) {
		// TODO: Implement compatibility check
		// Compatible if:
		// - Same number of parameters
		// - Parameter types match or are compatible
		// - Return types match or are compatible
		// - Can be unified with reasonable refactoring
		
		if (method1 == null || method2 == null) {
			return false;
		}
		
		// Basic check: same parameter count
		return method1.parameters().size() == method2.parameters().size();
	}
	
	/**
	 * Suggest signature harmonization
	 * 
	 * @param method1 First method
	 * @param method2 Second method
	 * @return Suggestion for unified signature (placeholder)
	 */
	public static String suggestRefactoring(MethodDeclaration method1, MethodDeclaration method2) {
		// TODO: Implement refactoring suggestion
		// Analyze both signatures and suggest:
		// - Common parameter types
		// - Appropriate return type
		// - Method name for extracted method
		return "// Refactoring suggestion placeholder";
	}
	
	/**
	 * Extract parameter types from method
	 * 
	 * @param method The method
	 * @return Array of parameter type names
	 */
	private static String[] getParameterTypes(MethodDeclaration method) {
		List<?> params = method.parameters();
		List<String> types = new ArrayList<>();
		for (Object obj : params) {
			if (obj instanceof SingleVariableDeclaration) {
				SingleVariableDeclaration svd = (SingleVariableDeclaration) obj;
				types.add(svd.getType() != null ? svd.getType().toString() : "");
			}
		}
		return types.toArray(new String[0]);
	}
}