| /* |
| * 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.BadPropertyValueException; |
| import com.google.gwt.core.ext.ConfigurationProperty; |
| import com.google.gwt.core.ext.PropertyOracle; |
| import com.google.gwt.core.ext.SelectionProperty; |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.core.ext.UnableToCompleteException; |
| import com.google.gwt.dev.util.collect.Sets; |
| import com.google.gwt.thirdparty.guava.common.base.Objects; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * A deferred binding condition to determine whether a named property has a |
| * particular value. |
| */ |
| public class ConditionWhenPropertyIs extends Condition { |
| |
| private final String propName; |
| |
| private final String value; |
| |
| public ConditionWhenPropertyIs(String propName, String value) { |
| this.propName = propName; |
| this.value = value; |
| } |
| |
| @Override |
| public boolean equals(Object object) { |
| if (object instanceof ConditionWhenPropertyIs) { |
| ConditionWhenPropertyIs that = (ConditionWhenPropertyIs) object; |
| return Objects.equal(this.propName, that.propName) |
| && Objects.equal(this.value, that.value); |
| } |
| return false; |
| } |
| |
| @Override |
| public Set<String> getRequiredProperties() { |
| return Sets.create(propName); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(propName, value); |
| } |
| |
| @Override |
| public String toString() { |
| return "<when-property-is name='" + propName + "' value='" + value + "'/>"; |
| } |
| |
| @Override |
| protected boolean doEval(TreeLogger logger, DeferredBindingQuery query) |
| throws UnableToCompleteException { |
| PropertyOracle propertyOracle = query.getPropertyOracle(); |
| String testValue; |
| try { |
| try { |
| SelectionProperty prop = propertyOracle.getSelectionProperty(logger, |
| propName); |
| testValue = prop.getCurrentValue(); |
| } catch (BadPropertyValueException e) { |
| ConfigurationProperty prop = propertyOracle.getConfigurationProperty(propName); |
| testValue = prop.getValues().get(0); |
| } |
| if (logger.isLoggable(TreeLogger.DEBUG)) { |
| logger.log(TreeLogger.DEBUG, "Property value is '" + testValue + "'", |
| null); |
| } |
| if (testValue.equals(value)) { |
| return true; |
| } else { |
| // no exact match was found, see if any fall back |
| // value would satisfy the condition |
| try { |
| SelectionProperty prop = propertyOracle.getSelectionProperty(logger, |
| propName); |
| List<? extends Set<String>> fallbackValues = prop.getFallbackValues(value); |
| if (fallbackValues != null && fallbackValues.size() > 0) { |
| if (logger.isLoggable(TreeLogger.DEBUG)) { |
| logger.log(TreeLogger.DEBUG, "Property value '" + value + "'" + |
| " is the fallback of '" + fallbackValues.toString() + "'", null); |
| } |
| int cost = -1; |
| for (Set<String> values : fallbackValues) { |
| for (String fallbackValue : values) { |
| if (testValue.equals(fallbackValue)) { |
| query.setFallbackEvaluationCost(cost); |
| return false; |
| } |
| } |
| cost--; |
| } |
| } |
| } catch (BadPropertyValueException e) { |
| // do nothing - currently, only selection |
| // properties support fall back values |
| } |
| return false; |
| } |
| } catch (BadPropertyValueException e) { |
| String msg = "Unable to get value of property '" + propName + "'"; |
| logger.log(TreeLogger.ERROR, msg, e); |
| throw new UnableToCompleteException(); |
| } |
| } |
| |
| @Override |
| protected String getEvalAfterMessage(String testType, boolean result) { |
| if (result) { |
| return "Yes, the property value matched"; |
| } else { |
| return "No, the value did not match"; |
| } |
| } |
| |
| @Override |
| protected String getEvalBeforeMessage(String testType) { |
| return toString(); |
| } |
| } |