forked from smooks/smooks
/
MapToResourceConfigFromParentConfig.java
124 lines (109 loc) · 4.98 KB
/
MapToResourceConfigFromParentConfig.java
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/*-
* ========================LICENSE_START=================================
* Core
* %%
* Copyright (C) 2020 Smooks
* %%
* Licensed under the terms of the Apache License Version 2.0, or
* the GNU Lesser General Public License version 3.0 or later.
*
* SPDX-License-Identifier: Apache-2.0 OR LGPL-3.0-or-later
*
* ======================================================================
*
* 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.
*
* ======================================================================
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* =========================LICENSE_END==================================
*/
package org.smooks.engine.resource.extension;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.smooks.api.SmooksException;
import org.smooks.api.resource.config.ResourceConfig;
import org.smooks.api.ExecutionContext;
import org.smooks.api.SmooksConfigException;
import org.smooks.api.resource.visitor.dom.DOMVisitBefore;
import org.w3c.dom.Element;
import jakarta.annotation.PostConstruct;
import javax.inject.Inject;
import java.util.EmptyStackException;
import java.util.Optional;
import java.util.Stack;
/**
* Map a property value from a parent {@link ResourceConfig} and onto
* the current {@link ResourceConfig}.
* <p/>
* The value is set on the {@link ResourceConfig} returned from the top
* of the {@link org.smooks.engine.resource.extension.ExtensionContext#getResourceStack() ExtensionContext resourece stack}.
*
* @author <a href="mailto:tom.fennelly@gmail.com">tom.fennelly@gmail.com</a>
*/
public class MapToResourceConfigFromParentConfig implements DOMVisitBefore {
private static final Logger LOGGER = LoggerFactory.getLogger(MapToResourceConfigFromParentConfig.class);
@Inject
private int parentRelIndex = -1;
@Inject
private String mapFrom;
@Inject
private Optional<String> mapTo;
@Inject
private Optional<String> defaultValue;
@PostConstruct
public void postConstruct() throws SmooksConfigException {
if(parentRelIndex >= 0) {
throw new SmooksConfigException("param 'parentRelIndex' value must be negative. Value is '" + parentRelIndex + "'.");
}
}
@Override
public void visitBefore(Element element, ExecutionContext executionContext) throws SmooksException {
Stack<ResourceConfig> resourceStack = executionContext.get(ExtensionContext.EXTENSION_CONTEXT_TYPED_KEY).getResourceStack();
ResourceConfig currentConfig;
ResourceConfig parentConfig;
String actualMapTo = mapTo.orElse(null);
//If no mapTo is set then the mapFrom value becomes the mapTo value
if(actualMapTo == null) {
actualMapTo = mapFrom;
}
// Get the current Config...
try {
currentConfig = resourceStack.peek();
} catch (EmptyStackException e) {
throw new SmooksException("No ResourceConfig available in ExtensionContext stack. Unable to set ResourceConfig property '" + actualMapTo + "' with element text value.");
}
// Get the parent Config...
try {
parentConfig = resourceStack.get(resourceStack.size() - 1 + parentRelIndex);
} catch (ArrayIndexOutOfBoundsException e) {
throw new SmooksException("No Parent ResourceConfig available in ExtensionContext stack at relative index '" + parentRelIndex + "'. Unable to set ResourceConfig property '" + actualMapTo + "' with value of '" + mapFrom + "' from parent configuration.");
}
if(LOGGER.isDebugEnabled()) {
LOGGER.debug("Mapping property '" + mapFrom + "' on parent resource configuration to property'" + actualMapTo + "'.");
}
ResourceConfigUtil.mapProperty(parentConfig, mapFrom, currentConfig, actualMapTo, defaultValue.orElse(null), executionContext);
}
}