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/*******************************************************************************
* Copyright (c) 2007, 2010 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.common.core.internal.utility.jdt;
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.jpt.common.core.utility.jdt.DeclarationAnnotationAdapter;
import org.eclipse.jpt.common.core.utility.jdt.DeclarationAnnotationElementAdapter;
import org.eclipse.jpt.common.core.utility.jdt.ExpressionConverter;
import org.eclipse.jpt.common.core.utility.jdt.ModifiedDeclaration;
import org.eclipse.jpt.common.utility.internal.StringTools;
/**
* 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[]> adapter;
// ********** constructors **********
/**
* The default element name is <code>value</code>.
* The default behavior is to remove the array initializer if it is empty.
*/
public EnumArrayDeclarationAnnotationElementAdapter(DeclarationAnnotationAdapter annotationAdapter) {
this(annotationAdapter, VALUE);
}
/**
* The default behavior is to remove the array initializer if it is empty.
*/
public EnumArrayDeclarationAnnotationElementAdapter(DeclarationAnnotationAdapter annotationAdapter, String elementName) {
this(annotationAdapter, elementName, true);
}
public EnumArrayDeclarationAnnotationElementAdapter(DeclarationAnnotationAdapter annotationAdapter, String elementName, boolean removeArrayInitializerWhenEmpty) {
this(new ConversionDeclarationAnnotationElementAdapter<String[]>(annotationAdapter, elementName, buildExpressionConverter(removeArrayInitializerWhenEmpty)));
}
private static ExpressionConverter<String[]> buildExpressionConverter(boolean removeArrayInitializerWhenEmpty) {
return new AnnotationStringArrayExpressionConverter(NameStringExpressionConverter.instance(), removeArrayInitializerWhenEmpty);
}
protected EnumArrayDeclarationAnnotationElementAdapter(ConversionDeclarationAnnotationElementAdapter<String[]> adapter) {
super();
this.adapter = adapter;
}
// ********** DeclarationAnnotationElementAdapter implementation **********
public String[] getValue(ModifiedDeclaration declaration) {
// ignore the adapter's getValue() - we want the expression
return this.resolve(this.adapter.getExpression(declaration), declaration);
}
public void setValue(String[] value, ModifiedDeclaration declaration) {
this.adapter.setValue(this.convertToSourceCodeNames(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 enums, which can be
* null
* or
* {FOO, BAR, BAZ}
* or
* FOO
*/
protected String[] resolve(Expression expression, ModifiedDeclaration declaration) {
if (expression == null) {
return StringTools.EMPTY_STRING_ARRAY;
} else if (expression.getNodeType() == ASTNode.ARRAY_INITIALIZER) {
return this.resolveArray((ArrayInitializer) expression, declaration);
} else {
return this.resolveSingleElement(expression, declaration);
}
}
protected String[] resolveArray(ArrayInitializer ai, @SuppressWarnings("unused") ModifiedDeclaration declaration) {
List<Expression> expressions = this.expressions(ai);
int len = expressions.size();
String[] enums = new String[len];
for (int i = len; i-- > 0; ) {
enums[i] = this.resolveEnum(expressions.get(i));
}
return enums;
}
protected String[] resolveSingleElement(Expression enumExpression, @SuppressWarnings("unused") ModifiedDeclaration declaration) {
return new String[] {this.resolveEnum(enumExpression)};
}
protected String resolveEnum(Expression expression) {
return ASTTools.resolveEnum(expression);
}
// minimize scope of suppressd warnings
@SuppressWarnings("unchecked")
private List<Expression> expressions(ArrayInitializer arrayInitializer) {
return arrayInitializer.expressions();
}
/**
* convert the fully-qualified enums to names that can be inserted in source code
* NB: imports may be added as a side-effect :-(
*/
protected String[] convertToSourceCodeNames(String[] enums, ModifiedDeclaration declaration) {
if (enums == null) {
return null;
}
int len = enums.length;
String[] sourceCodeNames = new String[len];
for (int i = 0; i < len; i++) {
sourceCodeNames[i] = this.convertToSourceCodeName(enums[i], declaration);
}
return sourceCodeNames;
}
protected String convertToSourceCodeName(String enum_, ModifiedDeclaration declaration) {
return EnumDeclarationAnnotationElementAdapter.convertToSourceCodeName(enum_, declaration);
}
}
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