com.google.gwt.dev.cfg.RuntimeRebindRuleGenerator Maven / Gradle / Ivy
/*
* Copyright 2013 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.gwt.dev.cfg;
import com.google.gwt.thirdparty.guava.common.collect.Maps;
import java.util.Map;
/**
* Generator used to generate runtime rebind rule class definitions.
*/
public class RuntimeRebindRuleGenerator {
public static final Map RUNTIME_REBIND_RULE_SOURCES_BY_NAME =
Maps.newLinkedHashMap();
private static int runtimeRebindRuleCount = 0;
/**
* Generates and stores a runtime rebind rule class definition for the given match expression and
* instance creation expression.
*
* The provided instance creation expression *must* be JSNI to avoid private access restrictions
* on the types being instantiated.
*/
public void generate(String jsniCreateInstanceExpression, String matchesExpression) {
String typeName = "RuntimeRebindRule" + runtimeRebindRuleCount++;
StringBuilder typeBody = new StringBuilder();
typeBody.append(
"private static class " + typeName + " extends RuntimeRebinder.RuntimeRebindRule {\n");
typeBody.append(" public native Object createInstance() /*-{\n");
typeBody.append(" " + jsniCreateInstanceExpression + "\n");
typeBody.append(" }-*/;\n");
typeBody.append(" public boolean matches(String requestTypeName) {\n");
typeBody.append(" " + matchesExpression + "\n");
typeBody.append(" }\n");
typeBody.append("}\n");
RUNTIME_REBIND_RULE_SOURCES_BY_NAME.put(typeName, typeBody.toString());
}
}