| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.xerces.util; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| |
| import org.apache.xerces.impl.Constants; |
| import org.apache.xerces.xni.parser.XMLComponentManager; |
| import org.apache.xerces.xni.parser.XMLConfigurationException; |
| |
| /** |
| * This class implements the basic operations for managing parser |
| * configuration features and properties. This utility class can |
| * be used as a base class for parser configurations or separately |
| * to encapsulate a number of parser settings as a component |
| * manager. |
| * <p> |
| * This class can be constructed with a "parent" settings object |
| * (in the form of an <code>XMLComponentManager</code>) that allows |
| * parser configuration settings to be "chained" together. |
| * |
| * @author Andy Clark, IBM |
| * |
| * @version $Id$ |
| */ |
| public class ParserConfigurationSettings |
| implements XMLComponentManager { |
| |
| protected static final String PARSER_SETTINGS = |
| Constants.XERCES_FEATURE_PREFIX + Constants.PARSER_SETTINGS; |
| |
| // |
| // Data |
| // |
| |
| // data |
| |
| /** Recognized properties. */ |
| protected ArrayList fRecognizedProperties; |
| |
| /** Properties. */ |
| protected HashMap fProperties; |
| |
| /** Recognized features. */ |
| protected ArrayList fRecognizedFeatures; |
| |
| /** Features. */ |
| protected HashMap fFeatures; |
| |
| /** Parent parser configuration settings. */ |
| protected XMLComponentManager fParentSettings; |
| |
| // |
| // Constructors |
| // |
| |
| /** Default Constructor. */ |
| public ParserConfigurationSettings() { |
| this(null); |
| } // <init>() |
| |
| /** |
| * Constructs a parser configuration settings object with a |
| * parent settings object. |
| */ |
| public ParserConfigurationSettings(XMLComponentManager parent) { |
| |
| // create storage for recognized features and properties |
| fRecognizedFeatures = new ArrayList(); |
| fRecognizedProperties = new ArrayList(); |
| |
| // create table for features and properties |
| fFeatures = new HashMap(); |
| fProperties = new HashMap(); |
| |
| // save parent |
| fParentSettings = parent; |
| |
| } // <init>(XMLComponentManager) |
| |
| // |
| // XMLParserConfiguration methods |
| // |
| |
| /** |
| * Allows a parser to add parser specific features to be recognized |
| * and managed by the parser configuration. |
| * |
| * @param featureIds An array of the additional feature identifiers |
| * to be recognized. |
| */ |
| public void addRecognizedFeatures(String[] featureIds) { |
| |
| // add recognized features |
| int featureIdsCount = featureIds != null ? featureIds.length : 0; |
| for (int i = 0; i < featureIdsCount; i++) { |
| String featureId = featureIds[i]; |
| if (!fRecognizedFeatures.contains(featureId)) { |
| fRecognizedFeatures.add(featureId); |
| } |
| } |
| |
| } // addRecognizedFeatures(String[]) |
| |
| /** |
| * Set the state of a feature. |
| * |
| * Set the state of any feature in a SAX2 parser. The parser |
| * might not recognize the feature, and if it does recognize |
| * it, it might not be able to fulfill the request. |
| * |
| * @param featureId The unique identifier (URI) of the feature. |
| * @param state The requested state of the feature (true or false). |
| * |
| * @exception org.apache.xerces.xni.parser.XMLConfigurationException If the |
| * requested feature is not known. |
| */ |
| public void setFeature(String featureId, boolean state) |
| throws XMLConfigurationException { |
| |
| // check and store |
| checkFeature(featureId); |
| |
| fFeatures.put(featureId, state ? Boolean.TRUE : Boolean.FALSE); |
| } // setFeature(String,boolean) |
| |
| /** |
| * Allows a parser to add parser specific properties to be recognized |
| * and managed by the parser configuration. |
| * |
| * @param propertyIds An array of the additional property identifiers |
| * to be recognized. |
| */ |
| public void addRecognizedProperties(String[] propertyIds) { |
| |
| // add recognizedProperties |
| int propertyIdsCount = propertyIds != null ? propertyIds.length : 0; |
| for (int i = 0; i < propertyIdsCount; i++) { |
| String propertyId = propertyIds[i]; |
| if (!fRecognizedProperties.contains(propertyId)) { |
| fRecognizedProperties.add(propertyId); |
| } |
| } |
| |
| } // addRecognizedProperties(String[]) |
| |
| /** |
| * setProperty |
| * |
| * @param propertyId |
| * @param value |
| * @exception org.apache.xerces.xni.parser.XMLConfigurationException If the |
| * requested feature is not known. |
| */ |
| public void setProperty(String propertyId, Object value) |
| throws XMLConfigurationException { |
| |
| // check and store |
| checkProperty(propertyId); |
| fProperties.put(propertyId, value); |
| |
| } // setProperty(String,Object) |
| |
| // |
| // XMLComponentManager methods |
| // |
| |
| /** |
| * Returns the state of a feature. |
| * |
| * @param featureId The feature identifier. |
| * @return true if the feature is supported |
| * |
| * @throws XMLConfigurationException Thrown for configuration error. |
| * In general, components should |
| * only throw this exception if |
| * it is <strong>really</strong> |
| * a critical error. |
| */ |
| public boolean getFeature(String featureId) |
| throws XMLConfigurationException { |
| |
| Boolean state = (Boolean) fFeatures.get(featureId); |
| |
| if (state == null) { |
| checkFeature(featureId); |
| return false; |
| } |
| return state.booleanValue(); |
| |
| } // getFeature(String):boolean |
| |
| /** |
| * Returns the value of a property. |
| * |
| * @param propertyId The property identifier. |
| * @return the value of the property |
| * |
| * @throws XMLConfigurationException Thrown for configuration error. |
| * In general, components should |
| * only throw this exception if |
| * it is <strong>really</strong> |
| * a critical error. |
| */ |
| public Object getProperty(String propertyId) |
| throws XMLConfigurationException { |
| |
| Object propertyValue = fProperties.get(propertyId); |
| |
| if (propertyValue == null) { |
| checkProperty(propertyId); |
| } |
| |
| return propertyValue; |
| |
| } // getProperty(String):Object |
| |
| // |
| // Protected methods |
| // |
| |
| /** |
| * Check a feature. If feature is known and supported, this method simply |
| * returns. Otherwise, the appropriate exception is thrown. |
| * |
| * @param featureId The unique identifier (URI) of the feature. |
| * |
| * @exception org.apache.xerces.xni.parser.XMLConfigurationException If the |
| * requested feature is not known. |
| */ |
| protected void checkFeature(String featureId) |
| throws XMLConfigurationException { |
| |
| // check feature |
| if (!fRecognizedFeatures.contains(featureId)) { |
| if (fParentSettings != null) { |
| fParentSettings.getFeature(featureId); |
| } |
| else { |
| short type = XMLConfigurationException.NOT_RECOGNIZED; |
| throw new XMLConfigurationException(type, featureId); |
| } |
| } |
| |
| } // checkFeature(String) |
| |
| /** |
| * Check a property. If the property is known and supported, this method |
| * simply returns. Otherwise, the appropriate exception is thrown. |
| * |
| * @param propertyId The unique identifier (URI) of the property |
| * being set. |
| * @exception org.apache.xerces.xni.parser.XMLConfigurationException If the |
| * requested feature is not known. |
| */ |
| protected void checkProperty(String propertyId) |
| throws XMLConfigurationException { |
| |
| // check property |
| if (!fRecognizedProperties.contains(propertyId)) { |
| if (fParentSettings != null) { |
| fParentSettings.getProperty(propertyId); |
| } |
| else { |
| short type = XMLConfigurationException.NOT_RECOGNIZED; |
| throw new XMLConfigurationException(type, propertyId); |
| } |
| } |
| |
| } // checkProperty(String) |
| |
| } // class ParserConfigurationSettings |
