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

CodeStyleCleanUpCore
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. - create core version based on CodeStyleCleanUp
/*******************************************************************************
 * 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. - create core version based on CodeStyleCleanUp
 *******************************************************************************/
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.CodeStyleFixCore;

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

Creates fixes which can resolve code style issues
See Also: CodeStyleFixCore/**
 * Creates fixes which can resolve code style issues
 * @see org.eclipse.jdt.internal.corext.fix.CodeStyleFixCore
 */
public class CodeStyleCleanUpCore extends AbstractMultiFixCore {

	public CodeStyleCleanUpCore() {
	}

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

	@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 nonStaticFields= isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS);
		boolean nonStaticMethods= isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS);
		boolean qualifyStatic= isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS);

		return nonStaticFields && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS_ALWAYS) ||
		       qualifyStatic && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_INSTANCE_ACCESS) ||
		       qualifyStatic && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_FIELD) ||
		       qualifyStatic && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_SUBTYPE_ACCESS) ||
		       nonStaticMethods && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS_ALWAYS) ||
		       qualifyStatic && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_METHOD) ||
		       nonStaticFields && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS_IF_NECESSARY) ||
		       nonStaticMethods && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS_IF_NECESSARY);
	}

	@Override
	public ICleanUpFixCore createFix(CompilationUnit compilationUnit) throws CoreException {
		if (compilationUnit == null)
			return null;

		boolean nonStaticFields= isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS);
		boolean nonStaticMethods= isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS);
		boolean qualifyStatic= isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS);

		return CodeStyleFixCore.createCleanUp(compilationUnit,
				nonStaticFields && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS_ALWAYS),
				qualifyStatic && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_INSTANCE_ACCESS),
				qualifyStatic && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_FIELD),
				qualifyStatic && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_SUBTYPE_ACCESS),
				nonStaticMethods && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS_ALWAYS),
				qualifyStatic && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_METHOD),
				nonStaticFields && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS_IF_NECESSARY),
				nonStaticMethods && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS_IF_NECESSARY)
				);
	}


	@Override
	public ICleanUpFixCore createFix(CompilationUnit compilationUnit, IProblemLocationCore[] problems) throws CoreException {
		return CodeStyleFixCore.createCleanUp(compilationUnit, problems,
				isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS_ALWAYS),
				isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_INSTANCE_ACCESS),
				isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_SUBTYPE_ACCESS));
	}

	private Map<String, String> getRequiredOptions() {
		Map<String, String> result= new Hashtable<>();
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_INSTANCE_ACCESS))
			result.put(JavaCore.COMPILER_PB_STATIC_ACCESS_RECEIVER, JavaCore.WARNING);
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_SUBTYPE_ACCESS))
			result.put(JavaCore.COMPILER_PB_INDIRECT_STATIC_ACCESS, JavaCore.WARNING);
		return result;
	}

	@Override
	public String[] getStepDescriptions() {
		List<String> result= new ArrayList<>();
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS_ALWAYS))
			result.add(MultiFixMessages.CodeStyleMultiFix_AddThisQualifier_description);
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS_ALWAYS))
			result.add(MultiFixMessages.CodeStyleCleanUp_QualifyNonStaticMethod_description);
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS_IF_NECESSARY))
			result.add(MultiFixMessages.CodeStyleCleanUp_removeFieldThis_description);
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS_IF_NECESSARY))
			result.add(MultiFixMessages.CodeStyleCleanUp_removeMethodThis_description);
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_FIELD))
			result.add(MultiFixMessages.CodeStyleMultiFix_QualifyAccessToStaticField);
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_METHOD))
			result.add(MultiFixMessages.CodeStyleCleanUp_QualifyStaticMethod_description);
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_INSTANCE_ACCESS))
			result.add(MultiFixMessages.CodeStyleMultiFix_ChangeNonStaticAccess_description);
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_SUBTYPE_ACCESS))
			result.add(MultiFixMessages.CodeStyleMultiFix_ChangeIndirectAccessToStaticToDirect);
		return result.toArray(new String[result.size()]);
	}

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

		buf.append("private int value;\n"); //$NON-NLS-1$
		buf.append("public int get() {\n"); //$NON-NLS-1$
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS_ALWAYS)) {
			buf.append("    return this.value + this.value;\n"); //$NON-NLS-1$
		} else if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS_IF_NECESSARY)) {
			buf.append("    return value + value;\n"); //$NON-NLS-1$
		} else {
			buf.append("    return this.value + value;\n"); //$NON-NLS-1$
		}
		buf.append("}\n"); //$NON-NLS-1$
		buf.append("\n"); //$NON-NLS-1$
		buf.append("public int getZero() {\n"); //$NON-NLS-1$
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS_ALWAYS)) {
			buf.append("    return this.get() - this.get();\n"); //$NON-NLS-1$
		} else if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_METHOD_USE_THIS_IF_NECESSARY)) {
			buf.append("    return get() - get();\n"); //$NON-NLS-1$
		} else {
			buf.append("    return this.get() - get();\n"); //$NON-NLS-1$
		}
		buf.append("}\n"); //$NON-NLS-1$
		buf.append("\n"); //$NON-NLS-1$
		buf.append("class E {\n"); //$NON-NLS-1$
		buf.append("    public static int NUMBER;\n"); //$NON-NLS-1$
		buf.append("    public static void set(int i) {\n"); //$NON-NLS-1$
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_FIELD)) {
			buf.append("        E.NUMBER= i;\n"); //$NON-NLS-1$
		} else {
			buf.append("        NUMBER= i;\n"); //$NON-NLS-1$
		}
		buf.append("    }\n"); //$NON-NLS-1$
		buf.append("\n"); //$NON-NLS-1$
		buf.append("    public void reset() {\n"); //$NON-NLS-1$
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_METHOD)) {
			buf.append("        E.set(0);\n"); //$NON-NLS-1$
		} else {
			buf.append("        set(0);\n"); //$NON-NLS-1$
		}
		buf.append("    }\n"); //$NON-NLS-1$
		buf.append("}\n"); //$NON-NLS-1$
		buf.append("\n"); //$NON-NLS-1$
		buf.append("class ESub extends E {\n"); //$NON-NLS-1$
		buf.append("    public void reset() {\n"); //$NON-NLS-1$
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_SUBTYPE_ACCESS)) {
			buf.append("        E.NUMBER= 0;\n"); //$NON-NLS-1$
		} else {
			buf.append("        ESub.NUMBER= 0;\n"); //$NON-NLS-1$
		}
		buf.append("    }\n"); //$NON-NLS-1$
		buf.append("}\n"); //$NON-NLS-1$
		buf.append("\n"); //$NON-NLS-1$
		buf.append("public void dec() {\n"); //$NON-NLS-1$
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_INSTANCE_ACCESS)) {
			buf.append("    E.NUMBER--;\n"); //$NON-NLS-1$
		} else {
			buf.append("    (new E()).NUMBER--;\n"); //$NON-NLS-1$
		}
		buf.append("}\n"); //$NON-NLS-1$

		return buf.toString();
	}

	@Override
	public boolean canFix(ICompilationUnit compilationUnit, IProblemLocationCore problem) {
		if (IProblem.UnqualifiedFieldAccess == problem.getProblemId())
			return isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS_ALWAYS);

		if (CodeStyleFixCore.isIndirectStaticAccess(problem))
			return isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_SUBTYPE_ACCESS);

		if (CodeStyleFixCore.isNonStaticAccess(problem))
			return isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_INSTANCE_ACCESS);

		return false;
	}

	@Override
	public int computeNumberOfFixes(CompilationUnit compilationUnit) {
		int result= 0;
		IProblem[] problems= compilationUnit.getProblems();
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_NON_STATIC_FIELD_USE_THIS_ALWAYS))
			result+= getNumberOfProblems(problems, IProblem.UnqualifiedFieldAccess);
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_SUBTYPE_ACCESS)) {
			for (int i=0;i<problems.length;i++) {
				int id= problems[i].getID();
				if (id == IProblem.IndirectAccessToStaticField || id == IProblem.IndirectAccessToStaticMethod)
					result++;
			}
		}
		if (isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS) && isEnabled(CleanUpConstants.MEMBER_ACCESSES_STATIC_QUALIFY_WITH_DECLARING_CLASS_INSTANCE_ACCESS)) {
			for (int i=0;i<problems.length;i++) {
				int id= problems[i].getID();
				if (id == IProblem.NonStaticAccessToStaticField || id == IProblem.NonStaticAccessToStaticMethod)
					result++;
			}
		}
		return result;
	}

}
/

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