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Closure Compiler is a JavaScript optimizing compiler. It parses your
JavaScript, analyzes it, removes dead code and rewrites and minimizes
what's left. It also checks syntax, variable references, and types, and
warns about common JavaScript pitfalls. It is used in many of Google's
JavaScript apps, including Gmail, Google Web Search, Google Maps, and
Google Docs.
/*
* Copyright 2013 The Closure Compiler Authors.
*
* 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.javascript.jscomp.newtypes;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import com.google.common.base.Splitter;
import com.google.common.collect.ImmutableList;
import com.google.javascript.rhino.Node;
/**
* Represents a qualified name.
* (e.g. namespace.inner.Foo)
*
* @author [email protected] (Ben Lickly)
* @author [email protected] (Dimitris Vardoulakis)
*/
public final class QualifiedName {
private ImmutableList parts;
private QualifiedName(ImmutableList parts) {
this.parts = parts;
}
public QualifiedName(String s) {
this.parts = ImmutableList.of(s);
}
public static QualifiedName join(QualifiedName lhs, QualifiedName rhs) {
return new QualifiedName(ImmutableList.builder()
.addAll(lhs.parts).addAll(rhs.parts).build());
}
public static QualifiedName fromNode(Node qnameNode) {
if (qnameNode == null || !qnameNode.isQualifiedName()) {
return null;
}
return qnameNode.isName()
? new QualifiedName(qnameNode.getString())
: new QualifiedName(ImmutableList.copyOf(
Splitter.on('.').split(qnameNode.getQualifiedName())));
}
public static QualifiedName fromQualifiedString(String qname) {
return qname.contains(".") ?
new QualifiedName(ImmutableList.copyOf(Splitter.on('.').split(qname))) :
new QualifiedName(qname);
}
public boolean isIdentifier() {
return parts.size() == 1;
}
public QualifiedName getAllButLeftmost() {
Preconditions.checkArgument(!isIdentifier());
return new QualifiedName(parts.subList(1, parts.size()));
}
public String getLeftmostName() {
return parts.get(0);
}
public QualifiedName getAllButRightmost() {
Preconditions.checkArgument(!isIdentifier());
return new QualifiedName(parts.subList(0, parts.size() - 1));
}
public String getRightmostName() {
return parts.get(parts.size() - 1);
}
@Override
public String toString() {
return Joiner.on(".").join(parts);
}
}