ratpack.groovy.template.internal.DefaultTextTemplateScript.java Source code

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Here is the source code for ratpack.groovy.template.internal.DefaultTextTemplateScript.java

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/*
 * Copyright 2013 the original author or authors.
 *
 * 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 ratpack.groovy.template.internal;

import com.google.common.escape.Escaper;
import com.google.common.html.HtmlEscapers;
import com.google.common.net.UrlEscapers;
import groovy.lang.Script;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.util.CharsetUtil;
import ratpack.groovy.template.TextTemplateModel;
import ratpack.groovy.template.TextTemplateScript;

import java.nio.CharBuffer;
import java.util.Collections;
import java.util.Map;

public abstract class DefaultTextTemplateScript extends Script implements TextTemplateScript {

    private static final Escaper HTML_ESCAPER = HtmlEscapers.htmlEscaper();
    private static final Escaper URL_PATH_SEGMENT_ESCAPER = UrlEscapers.urlPathSegmentEscaper();
    private static final Escaper URL_PARAM_ESCAPER = UrlEscapers.urlFormParameterEscaper();

    private final TextTemplateModel model;
    private final NestedRenderer renderer;
    private final ByteBuf buffer;

    protected DefaultTextTemplateScript(TextTemplateModel model, ByteBuf buffer, NestedRenderer renderer) {
        this.model = model;
        this.buffer = buffer;
        this.renderer = renderer;
    }

    public TextTemplateModel getModel() {
        return model;
    }

    public String render(String templateName) throws Exception {
        return render(Collections.<String, Object>emptyMap(), templateName);
    }

    public String render(Map<String, ?> model, String templateName) throws Exception {
        renderer.render(templateName, model);
        return "";
    }

    @Override
    public String html(Object value) {
        return value == null ? "" : HTML_ESCAPER.escape(value.toString());
    }

    @Override
    public String urlPathSegment(Object value) {
        return value == null ? "" : URL_PATH_SEGMENT_ESCAPER.escape(value.toString());
    }

    @Override
    public String urlParam(Object value) {
        return value == null ? "" : URL_PARAM_ESCAPER.escape(value.toString());
    }

    //CHECKSTYLE:OFF
    @SuppressWarnings("UnusedDeclaration")
    public void $(CharSequence charSequence) {
        //CHECKSTYLE:ON
        ByteBuf byteBuf = ByteBufUtil.encodeString(buffer.alloc(), CharBuffer.wrap(charSequence.toString()),
                CharsetUtil.UTF_8);
        buffer.writeBytes(byteBuf);
        byteBuf.release();
    }

}