forked from quarkusio/quarkus
/
VariantTemplateProducer.java
205 lines (168 loc) · 6.77 KB
/
VariantTemplateProducer.java
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package io.quarkus.qute.runtime;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.CompletionStage;
import java.util.function.Consumer;
import javax.enterprise.inject.Instance;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.Typed;
import javax.enterprise.inject.spi.AnnotatedParameter;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.jboss.logging.Logger;
import org.reactivestreams.Publisher;
import io.quarkus.qute.Engine;
import io.quarkus.qute.Expression;
import io.quarkus.qute.Template;
import io.quarkus.qute.TemplateInstance;
import io.quarkus.qute.TemplateInstanceBase;
import io.quarkus.qute.Variant;
import io.quarkus.qute.api.ResourcePath;
import io.quarkus.qute.api.VariantTemplate;
@Singleton
public class VariantTemplateProducer {
private static final Logger LOGGER = Logger.getLogger(VariantTemplateProducer.class);
@Inject
Instance<Engine> engine;
private Map<String, TemplateVariants> templateVariants;
void init(Map<String, List<String>> variants) {
if (templateVariants != null) {
LOGGER.warn("Qute VariantTemplateProducer already initialized!");
return;
}
LOGGER.debugf("Initializing VariantTemplateProducer: %s", templateVariants);
templateVariants = new HashMap<>();
for (Entry<String, List<String>> entry : variants.entrySet()) {
TemplateVariants var = new TemplateVariants(initVariants(entry.getKey(), entry.getValue()), entry.getKey());
templateVariants.put(entry.getKey(), var);
}
}
@Typed(VariantTemplate.class)
@Produces
VariantTemplate getDefaultVariantTemplate(InjectionPoint injectionPoint) {
String name = null;
if (injectionPoint.getMember() instanceof Field) {
// For "@Inject Template items" use "items"
name = injectionPoint.getMember().getName();
} else {
AnnotatedParameter<?> parameter = (AnnotatedParameter<?>) injectionPoint.getAnnotated();
if (parameter.getJavaParameter().isNamePresent()) {
name = parameter.getJavaParameter().getName();
} else {
name = injectionPoint.getMember().getName();
LOGGER.warnf("Parameter name not present - using the method name as the template name instead %s", name);
}
}
return new VariantTemplateImpl(name);
}
@Typed(VariantTemplate.class)
@Produces
@ResourcePath("ignored")
VariantTemplate getVariantTemplate(InjectionPoint injectionPoint) {
ResourcePath path = null;
for (Annotation qualifier : injectionPoint.getQualifiers()) {
if (qualifier.annotationType().equals(ResourcePath.class)) {
path = (ResourcePath) qualifier;
break;
}
}
if (path == null || path.value().isEmpty()) {
throw new IllegalStateException("No variant template resource path specified");
}
return new VariantTemplateImpl(path.value());
}
class VariantTemplateImpl implements VariantTemplate {
private final String baseName;
VariantTemplateImpl(String baseName) {
this.baseName = baseName;
}
@Override
public TemplateInstance instance() {
return new VariantTemplateInstanceImpl(templateVariants.get(baseName));
}
@Override
public Set<Expression> getExpressions() {
throw new UnsupportedOperationException();
}
@Override
public String getGeneratedId() {
throw new UnsupportedOperationException();
}
@Override
public Optional<Variant> getVariant() {
throw new UnsupportedOperationException();
}
}
class VariantTemplateInstanceImpl extends TemplateInstanceBase {
private final TemplateVariants variants;
VariantTemplateInstanceImpl(TemplateVariants variants) {
this.variants = variants;
setAttribute(VariantTemplate.VARIANTS, new ArrayList<>(variants.variantToTemplate.keySet()));
}
@Override
public String render() {
return template().instance().data(data()).render();
}
@Override
public CompletionStage<String> renderAsync() {
return template().instance().data(data()).renderAsync();
}
@Override
public Publisher<String> publisher() {
return template().instance().data(data()).publisher();
}
@Override
public CompletionStage<Void> consume(Consumer<String> consumer) {
return template().instance().data(data()).consume(consumer);
}
private Template template() {
Variant selected = (Variant) getAttribute(VariantTemplate.SELECTED_VARIANT);
String name = selected != null ? variants.variantToTemplate.get(selected) : variants.defaultTemplate;
return engine.get().getTemplate(name);
}
}
static class TemplateVariants {
public final Map<Variant, String> variantToTemplate;
public final String defaultTemplate;
public TemplateVariants(Map<Variant, String> variants, String defaultTemplate) {
this.variantToTemplate = variants;
this.defaultTemplate = defaultTemplate;
}
}
static String parseMediaType(String suffix) {
// TODO we need a proper way to parse the media type
if (suffix.equalsIgnoreCase(".html") || suffix.equalsIgnoreCase(".htm")) {
return Variant.TEXT_HTML;
} else if (suffix.equalsIgnoreCase(".xml")) {
return Variant.TEXT_XML;
} else if (suffix.equalsIgnoreCase(".txt")) {
return Variant.TEXT_PLAIN;
} else if (suffix.equalsIgnoreCase(".json")) {
return Variant.APPLICATION_JSON;
}
LOGGER.warn("Unknown media type for suffix: " + suffix);
return "application/octet-stream";
}
static String parseMediaType(String base, String variant) {
String suffix = variant.substring(base.length());
return parseMediaType(suffix);
}
private static Map<Variant, String> initVariants(String base, List<String> availableVariants) {
Map<Variant, String> map = new HashMap<>();
for (String path : availableVariants) {
if (!base.equals(path)) {
String mediaType = parseMediaType(base, path);
map.put(new Variant(null, mediaType, null), path);
}
}
return map;
}
}