com.google.gwt.dev.cfg.Condition Maven / Gradle / Ivy
/*
* 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 getRequiredProperties() {
return Sets.create();
}
/**
* Test the condition with the given parameters. If testType is
* null, then this condition isn't being used to remap a type,
* and typeOracle can also be null.
*/
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;
}
/**
* Returns the Java source String to runtime check the condition being encapsulated here.
*/
public abstract String toSource();
protected abstract boolean doEval(TreeLogger logger, DeferredBindingQuery query)
throws UnableToCompleteException;
protected abstract String getEvalAfterMessage(String testType, boolean result);
protected abstract String getEvalBeforeMessage(String testType);
}