/*******************************************************************************
* Copyright (c) 2013 GoPivotal, Inc.
* 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:
* GoPivotal, Inc. - initial API and implementation
*******************************************************************************/
package org.springframework.ide.eclipse.quickfix.jdt.proposals;
import java.util.List;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.jdt.core.IAnnotation;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.dom.AST;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.Annotation;
import org.eclipse.jdt.core.dom.ArrayInitializer;
import org.eclipse.jdt.core.dom.Expression;
import org.eclipse.jdt.core.dom.MemberValuePair;
import org.eclipse.jdt.core.dom.NormalAnnotation;
import org.eclipse.jdt.core.dom.SimpleName;
import org.eclipse.jdt.core.dom.SimpleType;
import org.eclipse.jdt.core.dom.TypeLiteral;
import org.eclipse.jdt.core.dom.rewrite.ASTRewrite;
import org.eclipse.jdt.core.dom.rewrite.ITrackedNodePosition;
import org.eclipse.jdt.core.dom.rewrite.ImportRewrite;
import org.eclipse.jdt.internal.core.SourceRefElement;
import org.eclipse.jdt.internal.ui.text.correction.ASTResolving;
import org.eclipse.jdt.internal.ui.text.correction.AssistContext;
import org.eclipse.jdt.ui.text.java.JavaContentAssistInvocationContext;
import org.eclipse.jface.text.source.SourceViewer;
import org.springframework.ide.eclipse.quickfix.QuickfixImages;
/**
* Proposal for completing a class attribute (i.e. ClassName.class)
* @author Terry Denney
* @since 3.3.0
*
*/
public class ClassCompletionProposal extends AnnotationCompletionProposal {
private final String className;
private Annotation annotation;
private ASTNode oldLiteral;
private final IPackageFragment packageFragment;
private final IAnnotation iAnnotation;
private final JavaContentAssistInvocationContext javaContext;
public ClassCompletionProposal(String className, IAnnotation a, IPackageFragment packageFragment,
JavaContentAssistInvocationContext javaContext) {
super(className + ".class", javaContext.getCompilationUnit(), QuickfixImages.getImage(QuickfixImages.CLASS));
this.className = className;
this.iAnnotation = a;
this.packageFragment = packageFragment;
this.javaContext = javaContext;
}
private void setupASTNodes() {
ICompilationUnit cu = javaContext.getCompilationUnit();
SourceViewer sourceViewer = (SourceViewer) javaContext.getViewer();
int invocationOffset = javaContext.getInvocationOffset();
AssistContext assistContext = new AssistContext(cu, sourceViewer, invocationOffset, 0);
ASTNode node = ((SourceRefElement) iAnnotation).findNode(assistContext.getASTRoot());
annotation = (Annotation) node;
if (node instanceof NormalAnnotation) {
NormalAnnotation normalAnnotation = (NormalAnnotation) node;
@SuppressWarnings("unchecked")
List<MemberValuePair> pairs = normalAnnotation.values();
for (MemberValuePair pair : pairs) {
Expression value = pair.getValue();
if (value instanceof TypeLiteral) {
if (isWithinRange(value, invocationOffset)) {
oldLiteral = value;
}
}
else if (value instanceof ArrayInitializer) {
ArrayInitializer arrayInit = (ArrayInitializer) value;
@SuppressWarnings("unchecked")
List<Expression> expressions = arrayInit.expressions();
for (Expression expression : expressions) {
if (expression instanceof TypeLiteral) {
if (isWithinRange(expression, invocationOffset)) {
oldLiteral = expression;
}
}
else if (expression instanceof SimpleName) {
if (isWithinRange(expression, invocationOffset)) {
oldLiteral = expression;
}
}
}
}
}
}
}
private boolean isWithinRange(Expression value, int invocationOffset) {
int startPosition = value.getStartPosition();
int length = value.getLength();
return startPosition < invocationOffset && startPosition + length >= invocationOffset;
}
@Override
protected ASTRewrite getRewrite() throws CoreException {
setupASTNodes();
AST ast = annotation.getAST();
ASTRewrite rewrite = ASTRewrite.create(ast);
if (oldLiteral == null) {
return rewrite;
}
SimpleName typeName = ast.newSimpleName(className);
SimpleType type = ast.newSimpleType(typeName);
TypeLiteral typeLiteral = ast.newTypeLiteral();
typeLiteral.setType(type);
final ITrackedNodePosition newValuePosition = rewrite.track(typeLiteral);
rewrite.replace(oldLiteral, typeLiteral, null);
if (packageFragment != null) {
ImportRewrite importRewrite = createImportRewrite(ASTResolving.findParentCompilationUnit(oldLiteral));
importRewrite.addImport(packageFragment.getElementName() + "." + className);
}
setTrackPosition(new ITrackedNodePosition() {
public int getStartPosition() {
return newValuePosition.getStartPosition() + newValuePosition.getLength();
}
public int getLength() {
return 0;
}
});
return rewrite;
}
}