| /* |
| * Copyright 2010 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.util; |
| |
| import com.google.gwt.dev.Permutation; |
| import com.google.gwt.dev.cfg.BindingProperties; |
| import com.google.gwt.dev.cfg.BindingProperty; |
| import com.google.gwt.thirdparty.guava.common.collect.ImmutableList; |
| import com.google.gwt.thirdparty.guava.common.collect.SortedSetMultimap; |
| import com.google.gwt.thirdparty.guava.common.collect.TreeMultimap; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * Creates a string representation of the binding property key/value pairs used |
| * in a Permutation. The value of a collapsed property will be represented by |
| * the set of equivalent values. |
| * <p> |
| * Assume that the <code>safari</code> and <code>ie8</code> |
| * <code>user.agent</code> values have been collapsed. Instead of printing |
| * <code>user.agent=safari</code>, this class will use |
| * <code>user.agent = { ie8, safari }</code>. |
| */ |
| public class CollapsedPropertyKey extends StringKey { |
| /** |
| * Create the string key for a collection of property oracles. |
| */ |
| private static String collapse(List<BindingProperties> allPropertiesSets) { |
| // The map used to create the string key |
| SortedSetMultimap<String, String> propertyValuesByPropertyName = TreeMultimap.create(); |
| for (BindingProperties bindingProperties : allPropertiesSets) { |
| BindingProperty[] properties = bindingProperties.getOrderedProps(); |
| String[] values = bindingProperties.getOrderedPropValues(); |
| for (int i = 0; i < properties.length; i++) { |
| BindingProperty property = properties[i]; |
| String value = values[i]; |
| |
| // For "hard" properties, add the singleton value. |
| propertyValuesByPropertyName.put(property.getName(), value); |
| |
| // Iterate over the equivalence sets defined in the property |
| for (Set<String> collapsedValues : property.getCollapsedValuesSets()) { |
| if (collapsedValues.contains(value)) { |
| /* |
| * If we find a set that contains the current value, add all the |
| * values in the set. This accounts for the transitive nature of |
| * equality. |
| */ |
| propertyValuesByPropertyName.putAll(property.getName(), collapsedValues); |
| } |
| } |
| } |
| } |
| return propertyValuesByPropertyName.toString(); |
| } |
| |
| private final Permutation permutation; |
| |
| /** |
| * Constructor that constructs a key containing all collapsed property/value |
| * pairs used by a Permutation. The given Permutation can be retrieved later |
| * through {@link #getPermutation()}. |
| */ |
| public CollapsedPropertyKey(Permutation permutation) { |
| super(collapse(permutation.getProperties().getSoftProperties())); |
| this.permutation = permutation; |
| } |
| |
| /** |
| * Creates a key based on all collapsed property/value pairs for a single permutation. |
| */ |
| public CollapsedPropertyKey(BindingProperties props) { |
| super(collapse(ImmutableList.of(props))); |
| this.permutation = null; |
| } |
| |
| public Permutation getPermutation() { |
| return permutation; |
| } |
| } |