org.eclipse.jdt/org.eclipse.jdt.core.manipulation/1.13.0 : org/eclipse/jdt/internal/ui/fix/UnusedCodeCleanUpCore.java

UnusedCodeCleanUpCore
http://www.eclipse.org/jdt: Java Code Manipulation Functionality (Eclipse Foundation)
Eclipse Public License - v 2.0
Copyright (c) 2019 IBM Corporation and others.
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:
    IBM Corporation - initial API and implementation
    Red Hat Inc. - copied and modified f
/*******************************************************************************
 * Copyright (c) 2019 IBM Corporation and others.
 *
 * 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:
 *     IBM Corporation - initial API and implementation
 *     Red Hat Inc. - copied and modified f
 *******************************************************************************/
package org.eclipse.jdt.internal.ui.fix;


import java.util.ArrayList;
import java.util.Hashtable;
import java.util.List;
import java.util.Map;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.compiler.IProblem;
import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jdt.core.manipulation.CleanUpRequirementsCore;
import org.eclipse.jdt.core.manipulation.ICleanUpFixCore;

import org.eclipse.jdt.internal.corext.fix.CleanUpConstants;
import org.eclipse.jdt.internal.corext.fix.UnusedCodeFixCore;

import org.eclipse.jdt.internal.ui.text.correction.IProblemLocationCore;

Create fixes which can remove unused code
see org.eclipse.jdt.internal.corext.fix.UnusedCodeFix
/**
 * Create fixes which can remove unused code
 * see org.eclipse.jdt.internal.corext.fix.UnusedCodeFix
 *
 */
public class UnusedCodeCleanUpCore extends AbstractMultiFixCore {

	public UnusedCodeCleanUpCore(Map<String, String> options) {
		super(options);
	}

	public UnusedCodeCleanUpCore() {
		super();
	}

	@Override
	public CleanUpRequirementsCore getRequirementsCore() {
		boolean requireAST= requireAST();
		Map<String, String> requiredOptions= requireAST ? getRequiredOptions() : null;
		return new CleanUpRequirementsCore(requireAST, false, false, requiredOptions);
	}

	private boolean requireAST() {
		boolean removeUnuseMembers= isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS);

		return removeUnuseMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_METHODS) ||
				removeUnuseMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_CONSTRUCTORS) ||
				removeUnuseMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_FELDS) ||
				removeUnuseMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_TYPES) ||
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_LOCAL_VARIABLES) ||
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_IMPORTS) && !isEnabled(CleanUpConstants.ORGANIZE_IMPORTS);
	}

	@Override
	protected ICleanUpFixCore createFix(CompilationUnit compilationUnit) throws CoreException {
		boolean removeUnuseMembers= isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS);

		return UnusedCodeFixCore.createCleanUp(compilationUnit,
				removeUnuseMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_METHODS),
				removeUnuseMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_CONSTRUCTORS),
				removeUnuseMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_FELDS),
				removeUnuseMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_TYPES),
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_LOCAL_VARIABLES),
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_IMPORTS) && !isEnabled(CleanUpConstants.ORGANIZE_IMPORTS),
				false);
	}

	@Override
	protected ICleanUpFixCore createFix(CompilationUnit compilationUnit, IProblemLocationCore[] problems) throws CoreException {
		boolean removeMembers= isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS);

		return UnusedCodeFixCore.createCleanUp(compilationUnit, problems,
				removeMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_METHODS),
				removeMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_CONSTRUCTORS),
				removeMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_FELDS),
				removeMembers && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_TYPES),
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_LOCAL_VARIABLES),
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_IMPORTS) && !isEnabled(CleanUpConstants.ORGANIZE_IMPORTS),
				false);
	}

	public Map<String, String> getRequiredOptions() {
		Map<String, String> result= new Hashtable<>();

		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_IMPORTS) && !isEnabled(CleanUpConstants.ORGANIZE_IMPORTS))
			result.put(JavaCore.COMPILER_PB_UNUSED_IMPORT, JavaCore.WARNING);

		boolean removeMembers= isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS);
		if (removeMembers && (
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_METHODS) ||
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_CONSTRUCTORS) ||
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_FELDS) ||
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_TYPES)))
			result.put(JavaCore.COMPILER_PB_UNUSED_PRIVATE_MEMBER, JavaCore.WARNING);

		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_LOCAL_VARIABLES))
			result.put(JavaCore.COMPILER_PB_UNUSED_LOCAL, JavaCore.WARNING);

		return result;
	}

	@Override
	public String[] getStepDescriptions() {
		List<String> result= new ArrayList<>();
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_IMPORTS))
			result.add(MultiFixMessages.UnusedCodeMultiFix_RemoveUnusedImport_description);
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_METHODS))
			result.add(MultiFixMessages.UnusedCodeMultiFix_RemoveUnusedMethod_description);
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_CONSTRUCTORS))
			result.add(MultiFixMessages.UnusedCodeMultiFix_RemoveUnusedConstructor_description);
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_TYPES))
			result.add(MultiFixMessages.UnusedCodeMultiFix_RemoveUnusedType_description);
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_FELDS))
			result.add(MultiFixMessages.UnusedCodeMultiFix_RemoveUnusedField_description);
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_LOCAL_VARIABLES))
			result.add(MultiFixMessages.UnusedCodeMultiFix_RemoveUnusedVariable_description);
		return result.toArray(new String[0]);
	}

	@Override
	public String getPreview() {
		StringBuilder buf= new StringBuilder();

		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_IMPORTS)) {
		} else {
			buf.append("import pack.Bar;\n"); //$NON-NLS-1$
		}
		buf.append("class Example {\n"); //$NON-NLS-1$
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_TYPES)) {
		} else {
			buf.append("    private class Sub {}\n"); //$NON-NLS-1$
		}
		buf.append("    public Example(boolean b) {}\n"); //$NON-NLS-1$
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_CONSTRUCTORS)) {
		} else {
			buf.append("    private Example() {}\n"); //$NON-NLS-1$
		}
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_FELDS)) {
		} else {
			buf.append("    private int fField;\n"); //$NON-NLS-1$
		}
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_METHODS)) {
		} else {
			buf.append("    private void foo() {}\n"); //$NON-NLS-1$
		}
		buf.append("    public void bar() {\n"); //$NON-NLS-1$
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_LOCAL_VARIABLES)) {
		} else {
			buf.append("        int i= 10;\n"); //$NON-NLS-1$
		}
		buf.append("    }\n"); //$NON-NLS-1$
		buf.append("}\n"); //$NON-NLS-1$

		return buf.toString();
	}

	@Override
	public boolean canFix(ICompilationUnit compilationUnit, IProblemLocationCore problem) {
		if (UnusedCodeFixCore.isUnusedImport(problem))
			return isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_IMPORTS);

		if (UnusedCodeFixCore.isUnusedMember(problem))
			return isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_METHODS) ||
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_CONSTRUCTORS) ||
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_TYPES) ||
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_FELDS) ||
				isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_LOCAL_VARIABLES);

		return false;
	}

	@Override
	public int computeNumberOfFixes(CompilationUnit compilationUnit) {
		int result= 0;
		IProblem[] problems= compilationUnit.getProblems();
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_IMPORTS) && !isEnabled(CleanUpConstants.ORGANIZE_IMPORTS)) {
			for (IProblem problem : problems) {
				int id= problem.getID();
				if (id == IProblem.UnusedImport || id == IProblem.DuplicateImport || id == IProblem.ConflictingImport ||
					    id == IProblem.CannotImportPackage || id == IProblem.ImportNotFound)
					result++;
			}
		}
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_METHODS))
			result+= getNumberOfProblems(problems, IProblem.UnusedPrivateMethod);
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_CONSTRUCTORS))
			result+= getNumberOfProblems(problems, IProblem.UnusedPrivateConstructor);
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_TYPES))
			result+= getNumberOfProblems(problems, IProblem.UnusedPrivateType);
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_MEMBERS) && isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_PRIVATE_FELDS))
			result+= getNumberOfProblems(problems, IProblem.UnusedPrivateField);
		if (isEnabled(CleanUpConstants.REMOVE_UNUSED_CODE_LOCAL_VARIABLES))
			result+= getNumberOfProblems(problems, IProblem.LocalVariableIsNeverUsed);
		return result;
	}
}
/

org.eclipse.jdt/ org.eclipse.jdt.core.manipulation/ 1.13.0/ org/eclipse/jdt/internal/ui/fix/UnusedCodeCleanUpCore.java
