|
Commons Digester example source code file (VariableSubstitutor.java)
The Commons Digester VariableSubstitutor.java source code/* $Id: VariableSubstitutor.java 992060 2010-09-02 19:09:47Z simonetripodi $ * * 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.commons.digester.substitution; import org.apache.commons.digester.Substitutor; import org.xml.sax.Attributes; /** * Substitutor implementation that support variable replacement * for both attributes and body text. * The actual expansion of variables into text is delegated to {@link VariableExpander} * implementations. * Supports setting an expander just for body text or just for attributes. * Also supported is setting no expanders for body text and for attributes. * * @since 1.6 */ public class VariableSubstitutor extends Substitutor { /** * The expander to be used to expand variables in the attributes. * Null when no expansion should be performed. */ private VariableExpander attributesExpander; /** * Attributes implementation that (lazily) performs variable substitution. * Will be lazily created when needed then reused. */ private VariableAttributes variableAttributes; /** * The expander to be used to expand variables in the body text. * Null when no expansion should be performed. */ private VariableExpander bodyTextExpander; /** * Constructs a Substitutor which uses the same VariableExpander for both * body text and attibutes. * @param expander VariableExpander implementation, * null if no substitutions are to be performed */ public VariableSubstitutor(VariableExpander expander) { this(expander, expander); } /** * Constructs a Substitutor. * @param attributesExpander VariableExpander implementation to be used for attributes, * null if no attribute substitutions are to be performed * @param bodyTextExpander VariableExpander implementation to be used for bodyTextExpander, * null if no attribute substitutions are to be performed */ public VariableSubstitutor(VariableExpander attributesExpander, VariableExpander bodyTextExpander) { this.attributesExpander = attributesExpander; this.bodyTextExpander = bodyTextExpander; variableAttributes = new VariableAttributes(); } /** * Substitutes the attributes (before they are passed to the * <code>Rule implementations's) */ @Override public Attributes substitute(Attributes attributes) { Attributes results = attributes; if (attributesExpander != null) { variableAttributes.init(attributes, attributesExpander); results = variableAttributes; } return results; } /** * Substitutes for the body text. * This method may substitute values into the body text of the * elements that Digester parses. * * @param bodyText the body text (as passed to <code>Digester) * @return the body text to be passed to the <code>Rule implementations */ @Override public String substitute(String bodyText) { String result = bodyText; if (bodyTextExpander != null) { result = bodyTextExpander.expand(bodyText); } return result; } } Other Commons Digester examples (source code examples)Here is a short list of links related to this Commons Digester VariableSubstitutor.java source code file: |
... this post is sponsored by my books ... | |
#1 New Release! |
FP Best Seller |
Copyright 1998-2024 Alvin Alexander, alvinalexander.com
All Rights Reserved.
A percentage of advertising revenue from
pages under the /java/jwarehouse
URI on this website is
paid back to open source projects.