001// Copyright 2005 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.hivemind.schema.rules;
016
017import org.apache.hivemind.Element;
018import org.apache.hivemind.schema.Rule;
019import org.apache.hivemind.schema.SchemaProcessor;
020import org.apache.hivemind.schema.Translator;
021
022/**
023 * A rule that reads the element's content, passes it through the content translator, then pushes
024 * the result onto the processor stack.
025 * 
026 * @since 1.1
027 * @author Knut Wannheden
028 */
029public class PushContentRule extends BaseRule implements Rule
030{
031    /**
032     * Uses the content translator to convert the element content into an object and pushes that
033     * object onto the processor stack.
034     */
035    public void begin(SchemaProcessor processor, Element element)
036    {
037        Translator t = processor.getContentTranslator();
038
039        String value = RuleUtils.processText(processor, element, element.getContent());
040
041        Object finalValue = t.translate(
042                processor.getContributingModule(),
043                Object.class,
044                value,
045                element.getLocation());
046
047        processor.push(finalValue);
048    }
049
050    /**
051     * Invokes {@link SchemaProcessor#pop()}.
052     */
053    public void end(SchemaProcessor processor, Element element)
054    {
055        processor.pop();
056    }
057}