/*
* Copyright (C) 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.gxp.compiler.parser;
import com.google.common.collect.Lists;
import com.google.gxp.compiler.alerts.AlertSink;
import com.google.gxp.compiler.alerts.SourcePosition;
import com.google.gxp.compiler.alerts.common.UnknownAttributeError;
import java.util.List;
/**
* The http://google.com/2001/gxp/expressions (aka "expr:") namespace.
*/
public class ExprNamespace implements Namespace {
private ExprNamespace(){}
public String getUri() {
return "http://google.com/2001/gxp/expressions";
}
public static final Namespace INSTANCE = new ExprNamespace();
public ParsedElement createElement(AlertSink alertSink,
SourcePosition sourcePosition,
String displayName,
String tagName,
List<ParsedAttribute> attrs,
List<ParsedElement> children) {
// <expr:s /> -> <gxp:eval expr='s' />
List<ParsedAttribute> newAttrs = Lists.newArrayList();
for (ParsedAttribute attr : attrs) {
if (attr.getName().equals("expr")) {
alertSink.add(new UnknownAttributeError(displayName, sourcePosition,
attr.getDisplayName()));
} else {
newAttrs.add(attr);
}
}
newAttrs.add(new ParsedAttribute(sourcePosition, NullNamespace.INSTANCE, "expr",
tagName, "expr"));
return new GxpNamespace.GxpElement(sourcePosition, displayName, newAttrs,
children, GxpNamespace.ElementType.EVAL);
}
public <T> T acceptVisitor(NamespaceVisitor<T> visitor) {
return visitor.visitExprNamespace(this);
}
}