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/*******************************************************************************
* Copyright (c) 2006, 2008 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.core.internal.utility.jdt;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.Expression;
import org.eclipse.jpt.core.utility.jdt.DeclarationAnnotationAdapter;
import org.eclipse.jpt.core.utility.jdt.DeclarationAnnotationElementAdapter;
import org.eclipse.jpt.core.utility.jdt.ModifiedDeclaration;
/**
* Wrap a declaration annotation element adapter and simply
* add an import for the enum when necessary.
*/
public class EnumDeclarationAnnotationElementAdapter
implements DeclarationAnnotationElementAdapter<String>
{
/**
* The wrapped adapter that returns and takes name strings (enums).
*/
private final ConversionDeclarationAnnotationElementAdapter<String> adapter;
// ********** constructors **********
/**
* The default element name is "value"; the default behavior is to
* remove the annotation when the last element is removed.
*/
public EnumDeclarationAnnotationElementAdapter(DeclarationAnnotationAdapter annotationAdapter) {
this(annotationAdapter, VALUE);
}
/**
* The default behavior is to remove the annotation when the last
* element is removed.
*/
public EnumDeclarationAnnotationElementAdapter(DeclarationAnnotationAdapter annotationAdapter, String elementName) {
this(annotationAdapter, elementName, true);
}
public EnumDeclarationAnnotationElementAdapter(DeclarationAnnotationAdapter annotationAdapter, String elementName, boolean removeAnnotationWhenEmpty) {
this(new ConversionDeclarationAnnotationElementAdapter<String>(annotationAdapter, elementName, removeAnnotationWhenEmpty, NameStringExpressionConverter.instance()));
}
protected EnumDeclarationAnnotationElementAdapter(ConversionDeclarationAnnotationElementAdapter<String> adapter) {
super();
this.adapter = adapter;
}
// ********** DeclarationAnnotationElementAdapter implementation **********
public String getValue(ModifiedDeclaration declaration) {
return this.resolve(this.adapter.getExpression(declaration));
}
public void setValue(String value, ModifiedDeclaration declaration) {
this.adapter.setValue(convertToSourceCodeName(value, declaration), declaration);
}
public Expression getExpression(ModifiedDeclaration declaration) {
return this.adapter.getExpression(declaration);
}
public ASTNode getAstNode(ModifiedDeclaration declaration) {
return this.adapter.getAstNode(declaration);
}
// ********** internal methods **********
/**
* resolve the enum
*/
protected String resolve(Expression expression) {
return JDTTools.resolveEnum(expression);
}
/**
* convert the fully-qualified enum constant to a static import and the constant's short name, e.g.
* static import javax.persistence.FetchType.EAGER;
* return "EAGER"
* if that doesn't work, convert to a normal import and the constant's partially-qualified name, e.g.
* import javax.persistence.FetchType;
* return "FetchType.EAGER"
* if that doesn't work, simply return the constant's fully-qualified name, e.g.
* return "javax.persistence.FetchType.EAGER"
* NB: an import may be added as a side-effect :-(
*/
protected static String convertToSourceCodeName(String enumConstantName, ModifiedDeclaration declaration) {
return (enumConstantName == null) ? null : convertToSourceCodeName_(enumConstantName, declaration);
}
/**
* pre-condition: enum constant name is non-null;
* convert it to its short version if we can add a static import etc.
*/
protected static String convertToSourceCodeName_(String enumConstantName, ModifiedDeclaration declaration) {
if (declaration.addStaticImport(enumConstantName)) {
return convertToShortName(enumConstantName);
}
if (declaration.addImport(convertToTypeName(enumConstantName))) {
return convertToPartiallyQualifiedName(enumConstantName);
}
return enumConstantName;
}
protected static String convertToShortName(String name) {
return name.substring(name.lastIndexOf('.') + 1);
}
protected static String convertToTypeName(String name) {
return name.substring(0, name.lastIndexOf('.'));
}
protected static String convertToPartiallyQualifiedName(String name) {
return name.substring(name.lastIndexOf('.', name.lastIndexOf('.') - 1) + 1);
}
}
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