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158
...anipulation/core extension/org/eclipse/jdt/internal/corext/fix/helper/ChangeBehavior.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| /******************************************************************************* | ||
| * Copyright (c) 2021 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.eclipse.jdt.internal.corext.fix.helper; | ||
|
|
||
| import static org.eclipse.jdt.internal.corext.fix.LibStandardNames.METHOD_DEFAULT_CHARSET; | ||
| import static org.eclipse.jdt.internal.corext.fix.LibStandardNames.METHOD_DISPLAY_NAME; | ||
|
|
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| import java.nio.charset.Charset; | ||
| import java.nio.charset.StandardCharsets; | ||
|
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| import org.eclipse.jdt.core.dom.AST; | ||
| import org.eclipse.jdt.core.dom.Expression; | ||
| import org.eclipse.jdt.core.dom.FieldAccess; | ||
| import org.eclipse.jdt.core.dom.MethodInvocation; | ||
| import org.eclipse.jdt.core.dom.rewrite.ImportRewrite; | ||
|
|
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| import org.eclipse.jdt.internal.corext.dom.ASTNodeFactory; | ||
| import org.eclipse.jdt.internal.corext.refactoring.structure.CompilationUnitRewrite; | ||
|
|
||
| public enum ChangeBehavior { | ||
| KEEP_BEHAVIOR() { | ||
| @Override | ||
| protected Expression computeCharsetASTNode(final CompilationUnitRewrite cuRewrite, AST ast, String charset) { | ||
| Expression callToCharsetDefaultCharset= null; | ||
|
|
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| if (charset != null) { | ||
| callToCharsetDefaultCharset= addCharsetUTF8(cuRewrite, ast, charset); | ||
| } else { | ||
| // needs Java 1.5 | ||
| callToCharsetDefaultCharset= addCharsetComputation(cuRewrite, ast); | ||
| } | ||
|
|
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| return callToCharsetDefaultCharset; | ||
| } | ||
|
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| @Override | ||
| protected String computeCharsetforPreview() { | ||
| String insert= ""; //$NON-NLS-1$ | ||
| insert= "Charset.defaultCharset()"; //$NON-NLS-1$ | ||
| return insert; | ||
| } | ||
| }, | ||
| ENFORCE_UTF8() { | ||
| @Override | ||
| protected Expression computeCharsetASTNode(final CompilationUnitRewrite cuRewrite, AST ast, String charset) { | ||
| Expression callToCharsetDefaultCharset= null; | ||
| // needs Java 1.7 | ||
| callToCharsetDefaultCharset= addCharsetUTF8(cuRewrite, ast, charset); | ||
| return callToCharsetDefaultCharset; | ||
| } | ||
|
|
||
| @Override | ||
| protected String computeCharsetforPreview() { | ||
| String insert= ""; //$NON-NLS-1$ | ||
| insert= "StandardCharsets.UTF_8"; //$NON-NLS-1$ | ||
| return insert; | ||
| } | ||
| }, | ||
| ENFORCE_UTF8_AGGREGATE() { | ||
| @Override | ||
| protected Expression computeCharsetASTNode(final CompilationUnitRewrite cuRewrite, AST ast, String charset) { | ||
| Expression callToCharsetDefaultCharset= null; | ||
| /** | ||
| * @TODO not implemented | ||
| */ | ||
| return callToCharsetDefaultCharset; | ||
| } | ||
|
|
||
| @Override | ||
| protected String computeCharsetforPreview() { | ||
| String insert= ""; //$NON-NLS-1$ | ||
| // insert="charset_constant"; //$NON-NLS-1$ | ||
| return insert; | ||
| } | ||
| }; | ||
|
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|
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| abstract protected Expression computeCharsetASTNode(final CompilationUnitRewrite cuRewrite, AST ast, String charset); | ||
|
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| abstract protected String computeCharsetforPreview(); | ||
|
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| /** | ||
| * Create access to StandardCharsets.UTF_8, needs Java 1.7 or newer | ||
| * | ||
| * @param cuRewrite CompilationUnitRewrite | ||
| * @param ast AST | ||
| * @param charset Charset as String | ||
| * @return FieldAccess that returns Charset for UTF_8 | ||
| */ | ||
| protected static FieldAccess addCharsetUTF8(CompilationUnitRewrite cuRewrite, AST ast, String charset) { | ||
| /** | ||
| * Add import java.nio.charset.StandardCharsets - available since Java 1.7 | ||
| */ | ||
| ImportRewrite importRewrite= cuRewrite.getImportRewrite(); | ||
| importRewrite.addImport(StandardCharsets.class.getCanonicalName()); | ||
| /** | ||
| * Add field access to StandardCharsets.UTF_8 | ||
| */ | ||
| FieldAccess fieldaccess= ast.newFieldAccess(); | ||
| fieldaccess.setExpression(ASTNodeFactory.newName(ast, StandardCharsets.class.getSimpleName())); | ||
|
|
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| fieldaccess.setName(ast.newSimpleName(charset)); | ||
| return fieldaccess; | ||
| } | ||
|
|
||
| /** | ||
| * Create call to Charset.defaultCharset(), needs Java 1.5 or newer | ||
| * | ||
| * @param cuRewrite CompilationUnitRewrite | ||
| * @param ast AST | ||
| * @return MethodInvocation that returns Charset for platform encoding | ||
| */ | ||
| protected static MethodInvocation addCharsetComputation(final CompilationUnitRewrite cuRewrite, AST ast) { | ||
| /** | ||
| * Add import java.nio.charset.Charset | ||
| */ | ||
| ImportRewrite importRewrite= cuRewrite.getImportRewrite(); | ||
| importRewrite.addImport(Charset.class.getCanonicalName()); | ||
| /** | ||
| * Add call to Charset.defaultCharset() - this is available since Java 1.5 | ||
| */ | ||
| MethodInvocation firstCall= ast.newMethodInvocation(); | ||
| firstCall.setExpression(ASTNodeFactory.newName(ast, Charset.class.getSimpleName())); | ||
| firstCall.setName(ast.newSimpleName(METHOD_DEFAULT_CHARSET)); | ||
| return firstCall; | ||
| } | ||
|
|
||
| /** | ||
| * Create call to Charset.defaultCharset().displayName(), needs Java 1.5 or newer | ||
| * | ||
| * @param cuRewrite CompilationUnitRewrite | ||
| * @param ast AST | ||
| * @param cb ChangeBehavior | ||
| * @param charset Charset as String | ||
| * @return MethodInvocation that returns String | ||
| */ | ||
| protected MethodInvocation addCharsetStringComputation(final CompilationUnitRewrite cuRewrite, AST ast, ChangeBehavior cb, String charset) { | ||
| Expression callToCharsetDefaultCharset= computeCharsetASTNode(cuRewrite, ast, charset); | ||
| /** | ||
| * Add second call to Charset.defaultCharset().displayName() | ||
| */ | ||
| MethodInvocation secondCall= ast.newMethodInvocation(); | ||
| secondCall.setExpression(callToCharsetDefaultCharset); | ||
| secondCall.setName(ast.newSimpleName(METHOD_DISPLAY_NAME)); | ||
| return secondCall; | ||
| } | ||
| } |
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