/*
* =============================================================================
*
* Copyright (c) 2011-2016, The THYMELEAF team (http://www.thymeleaf.org)
*
* 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.
*
* =============================================================================
*/
package org.thymeleaf.util;
import java.io.IOException;
import java.io.Writer;
import org.thymeleaf.context.ITemplateContext;
import org.thymeleaf.engine.TemplateModel;
/**
* <p>
* Character sequence that performs a lazy evaluation of a {@link TemplateModel} by the template engine.
* </p>
* <p>
* It is used sometimes internally by the engine in order to avoid the creation of extra String objects in
* some scenarios (e.g. inliners).
* </p>
* <p>
* This is mostly an <strong>internal class</strong>, and its use is not recommended from user's code.
* </p>
* <p>
* This class is <strong>not</strong> thread-safe.
* </p>
*
*
* @author Daniel Fernández
*
* @since 3.0.0
*
*/
public final class LazyProcessingCharSequence extends AbstractLazyCharSequence {
private final ITemplateContext context;
private final TemplateModel templateModel;
public LazyProcessingCharSequence(final ITemplateContext context, final TemplateModel templateModel) {
super();
if (context == null) {
throw new IllegalArgumentException("Template Context is null, which is forbidden");
}
if (templateModel == null) {
throw new IllegalArgumentException("Template Model is null, which is forbidden");
}
this.context = context;
this.templateModel = templateModel;
}
@Override
protected String resolveText() {
final Writer stringWriter = new FastStringWriter();
this.context.getConfiguration().getTemplateManager().process(this.templateModel, this.context, stringWriter);
return stringWriter.toString();
}
@Override
protected void writeUnresolved(final Writer writer) throws IOException {
this.context.getConfiguration().getTemplateManager().process(this.templateModel, this.context, writer);
}
}