/*
* 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.useragent.rebind;
import com.google.gwt.core.ext.BadPropertyValueException;
import com.google.gwt.core.ext.ConfigurationProperty;
import com.google.gwt.core.ext.Generator;
import com.google.gwt.core.ext.Generator.RunsLocal;
import com.google.gwt.core.ext.GeneratorContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.useragent.client.UserAgentAsserter;
import com.google.gwt.useragent.client.UserAgentAsserter.UserAgentAsserterDisabled;
/**
* Generator to enable/disable {@link UserAgentAsserter}. This generator exists because we can't
* deferred-bind via configuration property.
*/
@RunsLocal(requiresProperties = {"user.agent", "user.agent.runtimeWarning"})
public class UserAgentAsserterGenerator extends Generator {
private static final String PROPERTY_USER_AGENT_RUNTIME_WARNING = "user.agent.runtimeWarning";
private static final String USER_AGENT_ASSERTER = UserAgentAsserter.class.getCanonicalName();
private static final String USER_AGENT_ASSERTER_DISABLED =
UserAgentAsserterDisabled.class.getCanonicalName();
@Override
public String generate(TreeLogger logger, GeneratorContext context, String typeName)
throws UnableToCompleteException {
try {
ConfigurationProperty property =
context.getPropertyOracle().getConfigurationProperty(PROPERTY_USER_AGENT_RUNTIME_WARNING);
if (Boolean.valueOf(property.getValues().get(0)) == false) {
return USER_AGENT_ASSERTER_DISABLED;
}
} catch (BadPropertyValueException e) {
logger.log(TreeLogger.WARN,
"Unable to find value for '" + PROPERTY_USER_AGENT_RUNTIME_WARNING + "'", e);
}
return USER_AGENT_ASSERTER;
}
}