/*
* Copyright 2011 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.web.bindery.requestfactory.gwt.client.impl;
import com.google.web.bindery.autobean.shared.ValueCodex;
import com.google.gwt.editor.client.EditorContext;
import com.google.gwt.editor.client.EditorVisitor;
import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
/**
* Collects all non-value-type paths in an editor hierarchy for use with
* {@link com.google.web.bindery.requestfactory.gwt.client.RequestFactoryEditorDriver#getPaths()}.
*/
class PathCollector extends EditorVisitor {
/**
* Use a set in the case of aliased editors, so we don't repeat path entries.
*/
private final Set<String> paths = new LinkedHashSet<String>();
public List<String> getPaths() {
return new ArrayList<String>(paths);
}
@Override
public <T> boolean visit(EditorContext<T> ctx) {
String path = ctx.getAbsolutePath();
if (path.length() > 0) {
if (ValueCodex.canDecode(ctx.getEditedType())) {
/*
* If there's an @Path("foo.bar.valueField") annotation, we want to
* collect the containing "foo.bar" path.
*/
int dotPosition = path.lastIndexOf('.');
if (dotPosition > 0) {
String parentPath = path.substring(0, dotPosition);
paths.add(parentPath);
}
} else {
// Always collect @Path("foo.bar.baz") field, when baz isn't a value
paths.add(path);
}
}
if (ctx.asCompositeEditor() != null) {
ctx.traverseSyntheticCompositeEditor(this);
}
return true;
}
}