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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.config.protocol;
import com.yahoo.config.ConfigInstance;
import com.yahoo.config.ConfigurationRuntimeException;
import com.yahoo.slime.*;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* @author Ulf Lilleengen
*/
public class DefContent {
private final List<String> data;
private DefContent(List<String> data) {
this.data = data;
}
public String[] asStringArray() {
return data.toArray(new String[data.size()]);
}
public List<String> asList() {
return data;
}
public String asString() {
return com.yahoo.text.StringUtilities.implode(asStringArray(), "\n");
}
static DefContent fromSlime(Inspector data) {
final List<String> lst = new ArrayList<>();
data.traverse((ArrayTraverser) (idx, inspector) -> lst.add(inspector.asString()));
return new DefContent(lst);
}
public static DefContent fromClass(Class<? extends ConfigInstance> clazz) {
return fromArray(defSchema(clazz));
}
public static DefContent fromList(List<String> def) {
return new DefContent(def);
}
public static DefContent fromArray(String[] schema) {
return fromList(Arrays.asList(schema));
}
/**
* The def file payload of the actual class of the given config.
*
* @param configClass the class of a generated config instance
* @return a String array with the config definition (one line per element)
*/
private static String[] defSchema(Class<? extends ConfigInstance> configClass) {
if (configClass==null) return new String[0];
try {
Field f = configClass.getField("CONFIG_DEF_SCHEMA");
return (String[]) f.get(configClass);
} catch (NoSuchFieldException e) {
return new String[0];
} catch (Exception e) {
throw new ConfigurationRuntimeException(e);
}
}
public void serialize(final Cursor cursor) {
for (String line : data) {
cursor.addString(line);
}
}
public boolean isEmpty() {
return data.isEmpty();
}
}
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