| /* |
| * Copyright 2006 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.core.ext.TreeLogger; |
| import com.google.gwt.core.ext.UnableToCompleteException; |
| import com.google.gwt.dev.util.collect.Sets; |
| |
| import java.io.Serializable; |
| import java.util.Set; |
| |
| /** |
| * Abstract base class for various kinds of deferred binding conditions. |
| */ |
| public abstract class Condition implements Serializable { |
| |
| /** |
| * Returns the set of property names that the Condition requires in order to |
| * be evaluated. |
| */ |
| public Set<String> getRequiredProperties() { |
| return Sets.create(); |
| } |
| |
| /** |
| * Test the condition with the given parameters. If <code>testType</code> is |
| * <code>null</code>, then this condition isn't being used to remap a type, |
| * and <code>typeOracle</code> can also be <code>null</code>. |
| */ |
| public final boolean isTrue(TreeLogger logger, DeferredBindingQuery query) |
| throws UnableToCompleteException { |
| |
| boolean logDebug = logger.isLoggable(TreeLogger.DEBUG); |
| |
| if (logDebug) { |
| String startMsg = getEvalBeforeMessage(query.getTestType()); |
| logger = logger.branch(TreeLogger.DEBUG, startMsg, null); |
| } |
| |
| boolean result = doEval(logger, query); |
| |
| if (logDebug) { |
| String afterMsg = getEvalAfterMessage(query.getTestType(), result); |
| logger.log(TreeLogger.DEBUG, afterMsg, null); |
| } |
| |
| return result; |
| } |
| |
| protected abstract boolean doEval(TreeLogger logger, DeferredBindingQuery query) |
| throws UnableToCompleteException; |
| |
| protected abstract String getEvalAfterMessage(String testType, boolean result); |
| |
| protected abstract String getEvalBeforeMessage(String testType); |
| } |