/
ResourceCodeResolver.java
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/
ResourceCodeResolver.java
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package gg.jte.resolve;
import gg.jte.CodeResolver;
import gg.jte.compiler.IoUtils;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.UncheckedIOException;
import java.net.URISyntaxException;
import java.net.URL;
/**
* Resolves template code within a given resources root.
*/
public class ResourceCodeResolver implements CodeResolver {
private final String root;
private final ClassLoader classLoader;
public ResourceCodeResolver(String root) {
this(root, null);
}
public ResourceCodeResolver(String root, ClassLoader classLoader) {
if (root.isEmpty()) {
this.root = "";
} else {
this.root = root + "/";
}
this.classLoader = classLoader;
}
@Override
public String resolve(String name) {
try (InputStream is = getClassLoader().getResourceAsStream(root + name)) {
if (is == null) {
return null;
}
return IoUtils.toString(is);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
@Override
public boolean exists(String name) {
return getClassLoader().getResource(root + name) != null;
}
@Override
public long getLastModified(String name) {
URL res = getClassLoader().getResource(root + name);
if (res == null) {
return 0;
}
try {
// Returns 0 if the file does not exist or an I/O error occurs.
return new File(res.toURI()).lastModified();
} catch (IllegalArgumentException | URISyntaxException e) {
return 0;
}
}
private ClassLoader getClassLoader() {
if (classLoader != null) {
return classLoader;
}
return Thread.currentThread().getContextClassLoader();
}
}