package org.grails.databinding.compiler;
import java.util.Map;
import org.codehaus.groovy.ast.ASTNode;
import org.codehaus.groovy.ast.AnnotationNode;
import org.codehaus.groovy.ast.FieldNode;
import org.codehaus.groovy.ast.expr.Expression;
import org.codehaus.groovy.control.CompilePhase;
import org.codehaus.groovy.control.SourceUnit;
import org.codehaus.groovy.control.messages.SyntaxErrorMessage;
import org.codehaus.groovy.syntax.SyntaxException;
import org.codehaus.groovy.transform.ASTTransformation;
import org.codehaus.groovy.transform.GroovyASTTransformation;
@GroovyASTTransformation(phase = CompilePhase.SEMANTIC_ANALYSIS)
public class BindingFormatASTTransformation implements ASTTransformation {
@Override
public void visit(final ASTNode[] astNodes, final SourceUnit source) {
if (!(astNodes[0] instanceof AnnotationNode) || !(astNodes[1] instanceof FieldNode)) {
throw new RuntimeException("Internal error: wrong types: $node.class / $parent.class");
}
final AnnotationNode annotationNode = (AnnotationNode) astNodes[0];
final FieldNode fieldNode = (FieldNode) astNodes[1];
final Map<String, Expression> members = annotationNode.getMembers();
if(members == null || (!members.containsKey("code") && !members.containsKey("value"))) {
final String message = "The @BindingFormat annotation on the field ["
+ fieldNode.getName() +
"] in class [" +
fieldNode.getDeclaringClass().getName() +
"] must provide a value for either the value() or code() attribute.";
error(source, fieldNode, message);
}
}
protected void error(final SourceUnit sourceUnit, final ASTNode astNode, final String message) {
final SyntaxException syntaxException = new SyntaxException(message, astNode.getLineNumber(), astNode.getColumnNumber());
final SyntaxErrorMessage syntaxErrorMessage = new SyntaxErrorMessage(syntaxException, sourceUnit);
sourceUnit.getErrorCollector().addError(syntaxErrorMessage, false);
}
}