| /* |
| * Copyright 2008 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.DefaultConfigurationProperty; |
| import com.google.gwt.core.ext.DefaultSelectionProperty; |
| import com.google.gwt.core.ext.PropertyOracle; |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.thirdparty.guava.common.base.Function; |
| import com.google.gwt.thirdparty.guava.common.collect.Maps; |
| |
| import java.io.Serializable; |
| import java.util.Arrays; |
| import java.util.Map; |
| import java.util.TreeSet; |
| |
| /** |
| * An implementation of {@link PropertyOracle} that contains property values, |
| * rather than computing them. |
| */ |
| public class StaticPropertyOracle implements PropertyOracle, Serializable { |
| |
| private final Map<String, ConfigurationProperty> configPropertiesByName; |
| |
| private final BindingProperty[] orderedProps; |
| |
| private final String[] orderedPropValues; |
| |
| /** |
| * Create a property oracle that will return the supplied values. |
| * |
| * @param orderedProps array of binding properties |
| * @param orderedPropValues values of the above binding properties |
| * @param configProps array of config properties |
| */ |
| public StaticPropertyOracle(BindingProperty[] orderedProps, |
| String[] orderedPropValues, ConfigurationProperty[] configProps) { |
| this.orderedProps = orderedProps; |
| this.orderedPropValues = orderedPropValues; |
| this.configPropertiesByName = |
| Maps.uniqueIndex(Arrays.asList(configProps), getConfigNameExtractor()); |
| |
| // Reject illegal values at construction time |
| int len = orderedProps.length; |
| for (int i = 0; i < len; i++) { |
| BindingProperty prop = orderedProps[i]; |
| String value = orderedPropValues[i]; |
| if (!prop.isAllowedValue(value)) { |
| throw new IllegalArgumentException("Property " + prop.getName() |
| + " cannot have value " + value); |
| } |
| } |
| } |
| |
| @Override |
| public com.google.gwt.core.ext.ConfigurationProperty getConfigurationProperty(String propertyName) |
| throws BadPropertyValueException { |
| ConfigurationProperty config = configPropertiesByName.get(propertyName); |
| if (config == null) { |
| throw new BadPropertyValueException(propertyName); |
| } |
| return new DefaultConfigurationProperty(config.getName(), config.getValues()); |
| } |
| |
| /** |
| * @return an array of binding properties. |
| */ |
| public BindingProperty[] getOrderedProps() { |
| return orderedProps; |
| } |
| |
| /** |
| * @return an array of binding property values. |
| */ |
| public String[] getOrderedPropValues() { |
| return orderedPropValues; |
| } |
| |
| public com.google.gwt.core.ext.SelectionProperty getSelectionProperty( |
| TreeLogger logger, String propertyName) |
| throws BadPropertyValueException { |
| // In practice there will probably be so few properties that a linear |
| // search is at least as fast as a map lookup by name would be. |
| // If that turns out not to be the case, the ctor could build a |
| // name-to-index map. |
| for (int i = 0; i < orderedProps.length; i++) { |
| final BindingProperty prop = orderedProps[i]; |
| final String name = prop.getName(); |
| if (name.equals(propertyName)) { |
| final String value = orderedPropValues[i]; |
| String[] values = prop.getDefinedValues(); |
| final TreeSet<String> possibleValues = new TreeSet<String>(); |
| for (String v : values) { |
| possibleValues.add(v); |
| } |
| return new DefaultSelectionProperty(value, prop.getFallback(), name, |
| possibleValues, prop.getFallbackValuesMap()); |
| } |
| } |
| |
| throw new BadPropertyValueException(propertyName); |
| } |
| |
| /** |
| * Dumps the binding property key/value pairs; For debugging use only. |
| */ |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| for (int i = 0, j = orderedProps.length; i < j; i++) { |
| sb.append(orderedProps[i].getName()).append(" = ").append( |
| orderedPropValues[i]).append(" "); |
| } |
| return sb.toString(); |
| } |
| |
| private static Function<ConfigurationProperty, String> getConfigNameExtractor() { |
| return new Function<ConfigurationProperty, String>() { |
| @Override |
| public String apply(ConfigurationProperty config) { |
| return config.getName(); |
| } |
| }; |
| } |
| } |