Tilman
97 lines
3.1 KiB
Java
97 lines
3.1 KiB
Java
/* Copyright (c) 2008 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.contacts;
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import java.util.EnumMap;
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import java.util.Map;
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/**
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* Parser to tokenize element descriptions.
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* The general format of an element specification looks like:
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* [<value>]|[<name_1>:<value_1>][,<name_2>:<value_2>]...[,<name_n>:<value_n>]
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*
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* For convenience a single unnamed value can be specified. It is treated as
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* "value:<value>", and the parsed value can be accessed with the VALUE key.
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*
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*
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*/
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class ElementParser {
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// Map of parsed property names and values.
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private Map<PropertyName, String> propertyMap;
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/**
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* Constructor.
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* Parses the element description, and fills the propertyMap.
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*
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* @param elementDesc the element description.
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* @throws IllegalArgumentException on badly formated element description.
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*/
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ElementParser(String elementDesc) throws IllegalArgumentException {
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propertyMap = new EnumMap<PropertyName, String>(PropertyName.class);
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for (String propertyDesc : elementDesc.split(",")) {
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String nameValuePair[] = propertyDesc.split(":", 2);
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if (nameValuePair.length == 1) {
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propertyMap.put(PropertyName.VALUE, propertyDesc);
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} else if (nameValuePair.length == 2){
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propertyMap.put(
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PropertyName.valueOf(nameValuePair[0].toUpperCase()),
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nameValuePair[1]);
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} else {
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throw new IllegalArgumentException("Badly formated property:"
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+ propertyDesc);
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}
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}
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}
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/**
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* Checks if the given property has a parsed in value.
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*
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* @param property the property.
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* @return {@code true} if the given property has a parsed in value,
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* otherwise {@code false}
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*/
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boolean has(PropertyName property) {
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return propertyMap.containsKey(property);
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}
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/**
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* Retrieves the parsed in value for the given property.
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*
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* @param property the property.
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* @return the parsed in value for the given property, or {@code null} if
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* the given property was not specified in the element description
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* string.
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*/
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String get(PropertyName property) {
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return propertyMap.get(property);
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}
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/**
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* Convenience method to check the value of a boolean property.
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*
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* @param property the property.
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* @return {@code true} if the parsed in value of the given property is "true"
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* {@code false} in any other cases.
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*/
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boolean is(PropertyName property) {
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String value = propertyMap.get(property);
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return (value != null) && (value.toLowerCase().equals("true"));
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}
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}
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