com.google.javascript.jscomp.transpile.TranspilerBuilder Maven / Gradle / Ivy
/*
* Copyright 2016 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.transpile;
import com.google.common.cache.CacheBuilder;
import javax.annotation.CheckReturnValue;
/**
* Basic Transpiler implementation for outputting ES5 code.
*/
public final class TranspilerBuilder {
/**
* Returns a new TranspilerBuilder that transpiles down to ES5.
*/
public static TranspilerBuilder toEs5() {
return TO_ES5;
}
private static final TranspilerBuilder TO_ES5 =
new TranspilerBuilder(
new BaseTranspiler(new BaseTranspiler.CompilerSupplier(), "es6_runtime"));
private final Transpiler transpiler;
TranspilerBuilder(Transpiler transpiler) {
this.transpiler = transpiler;
}
/**
* Returns a TranspilerBuilder with cached transpilations, using the default
* cache settings (maximum size of 10,000). Note that the builder itself is
* not changed.
*/
@CheckReturnValue
public TranspilerBuilder caching() {
return caching(DEFAULT_CACHE_SPEC);
}
/**
* Returns a TranspilerBuilder with cached transpilations, using the given cache spec. Note that
* the builder itself is not changed.
*/
@CheckReturnValue
public TranspilerBuilder caching(String spec) {
return caching(CacheBuilder.from(spec));
}
/**
* Returns a TranspilerBuilder with cached transpilations, using the given cache builder. Note
* that the builder itself is not changed.
*/
@CheckReturnValue
public TranspilerBuilder caching(CacheBuilder builder) {
return new TranspilerBuilder(new CachingTranspiler(transpiler, builder));
}
private static final String DEFAULT_CACHE_SPEC = "maximumSize=10000";
/**
* Returns the built Transpiler.
*/
public Transpiler build() {
return transpiler;
}
}