mirror of https://github.com/apache/lucene.git
LUCENE-2510: Improve the Maven-like pattern detection for the named loader. TODO: We should create an ant task that creates the META-INF/services list from filesets
git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene2510@1365239 13f79535-47bb-0310-9956-ffa450edef68
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@ -17,12 +17,14 @@ package org.apache.lucene.analysis.util;
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* limitations under the License.
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*/
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Locale;
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import java.util.Map;
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import java.util.LinkedHashMap;
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import java.util.Set;
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import org.apache.lucene.util.NamedSPILoader.NamedSPI; // javadocs
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import java.util.ServiceConfigurationError;
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import org.apache.lucene.util.SPIClassIterator;
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/**
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@ -53,56 +55,27 @@ public final class AnalysisSPILoader<S extends AbstractAnalysisFactory> {
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while (loader.hasNext()) {
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final Class<? extends S> service = loader.next();
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final String clazzName = service.getSimpleName();
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int suffixIndex = -1;
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String name = null;
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for (String suffix : suffixes) {
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suffixIndex = clazzName.lastIndexOf(suffix);
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if (suffixIndex != -1) {
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if (clazzName.endsWith(suffix)) {
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name = clazzName.substring(0, clazzName.length() - suffix.length()).toLowerCase(Locale.ROOT);
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break;
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}
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}
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final String name = clazzName.substring(0, suffixIndex).toLowerCase(Locale.ROOT);
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if (name == null) {
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throw new ServiceConfigurationError("The class name " + service.getName() +
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" has wrong suffix, allowed are: " + Arrays.toString(suffixes));
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}
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// only add the first one for each name, later services will be ignored
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// this allows to place services before others in classpath to make
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// them used instead of others
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if (!services.containsKey(name)) {
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assert checkServiceName(name);
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services.put(name, service);
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}
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}
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this.services = Collections.unmodifiableMap(services);
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}
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/**
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* Validates that a service name meets the requirements of {@link NamedSPI}
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*/
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public static boolean checkServiceName(String name) {
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// based on harmony charset.java
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if (name.length() >= 128) {
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throw new IllegalArgumentException("Illegal service name: '" + name + "' is too long (must be < 128 chars).");
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}
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for (int i = 0; i < name.length(); i++) {
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char c = name.charAt(i);
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if (!isLetter(c) && !isDigit(c)) {
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throw new IllegalArgumentException("Illegal service name: '" + name + "' must be simple ascii alphanumeric.");
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}
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}
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return true;
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}
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/*
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* Checks whether a character is a letter (ascii) which are defined in the spec.
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*/
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private static boolean isLetter(char c) {
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return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
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}
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/*
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* Checks whether a character is a digit (ascii) which are defined in the spec.
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*/
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private static boolean isDigit(char c) {
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return ('0' <= c && c <= '9');
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}
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// TODO: do we even need this method?
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public S newInstance(String name) {
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final Class<? extends S> service = lookupClass(name);
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