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/*******************************************************************************
* Copyright (c) 2007 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.jdtutility;
import java.util.List;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.ArrayInitializer;
import org.eclipse.jdt.core.dom.Expression;
import org.eclipse.jdt.core.dom.Name;
/**
* Wrap a declaration annotation element adapter and simply
* add an import for the enums when necessary.
*/
public class EnumArrayDeclarationAnnotationElementAdapter
implements DeclarationAnnotationElementAdapter<String[]>
{
/**
* The wrapped adapter that returns and takes name strings (enums).
*/
private final ConversionDeclarationAnnotationElementAdapter<String[], ArrayInitializer> adapter;
// ********** constructors **********
/**
* The default element name is "value"; the default behavior is to
* remove the annotation when the last element is removed.
*/
public EnumArrayDeclarationAnnotationElementAdapter(DeclarationAnnotationAdapter annotationAdapter) {
this(annotationAdapter, "value");
}
/**
* The default behavior is to remove the annotation when the last
* element is removed.
*/
public EnumArrayDeclarationAnnotationElementAdapter(DeclarationAnnotationAdapter annotationAdapter, String elementName) {
this(annotationAdapter, elementName, true);
}
public EnumArrayDeclarationAnnotationElementAdapter(DeclarationAnnotationAdapter annotationAdapter, String elementName, boolean removeAnnotationWhenEmpty) {
this(new ConversionDeclarationAnnotationElementAdapter<String[], ArrayInitializer>(annotationAdapter, elementName, removeAnnotationWhenEmpty, buildExpressionConverter()));
}
private static ExpressionConverter<String[], ArrayInitializer> buildExpressionConverter() {
return new StringArrayExpressionConverter<Name>(NameStringExpressionConverter.instance());
}
protected EnumArrayDeclarationAnnotationElementAdapter(ConversionDeclarationAnnotationElementAdapter<String[], ArrayInitializer> adapter) {
super();
this.adapter = adapter;
}
// ********** DeclarationAnnotationElementAdapter implementation **********
public String[] getValue(ModifiedDeclaration declaration) {
return this.resolve(this.adapter.expression(declaration), declaration);
}
public void setValue(String[] value, ModifiedDeclaration declaration) {
this.adapter.setValue(this.convertToShortNames(value, declaration), declaration);
}
public Expression expression(ModifiedDeclaration declaration) {
return this.adapter.expression(declaration);
}
public ASTNode astNode(ModifiedDeclaration declaration) {
return this.adapter.astNode(declaration);
}
// ********** internal methods **********
/**
* resolve the enums
*/
protected String[] resolve(Expression enumsExpression, ModifiedDeclaration declaration) {
if (enumsExpression == null) {
return null;
}
ArrayInitializer ai = (ArrayInitializer) enumsExpression;
List<Expression> expressions = this.expressions(ai);
int len = expressions.size();
String[] enums = new String[len];
for (int i = len; i-- > 0; ) {
enums[i] = JDTTools.resolveEnum(declaration.iCompilationUnit(), expressions.get(i));
}
return enums;
}
@SuppressWarnings("unchecked")
private List<Expression> expressions(ArrayInitializer arrayInitializer) {
return arrayInitializer.expressions();
}
/**
* convert the fully-qualified enums to static imports and short names
*/
protected String[] convertToShortNames(String[] enums, ModifiedDeclaration declaration) {
if (enums == null) {
return null;
}
int len = enums.length;
String[] shortNames = new String[len];
for (int i = len; i-- > 0; ) {
declaration.addStaticImport(enums[i]); // e.g. "javax.persistence.CascadeType.REFRESH"
shortNames[i] = this.shortName(enums[i]); // e.g. "EAGER"
}
return shortNames;
}
protected String shortTypeName(String name) {
return name.substring(0, name.lastIndexOf('.'));
}
protected String shortName(String name) {
return name.substring(name.lastIndexOf('.') + 1);
}
}
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