| /* |
| * 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.<br /> |
| */ |
| public class RuntimeRebindRuleGenerator { |
| |
| public static final Map<String, String> 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.<br /> |
| * |
| * 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()); |
| } |
| } |