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XmlLanguageInjector: do not create Patterns for empty regex

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This commit is contained in:
Gregory.Shrago
2013-03-07 17:49:19 +04:00
parent 40492aa2b9
commit b632bd601c
1 changed files with 5 additions and 3 deletions
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plugins/IntelliLang/xml-support/org/intellij/plugins/intelliLang/inject/xml/XmlLanguageInjector.java
+5 -3
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@@ -41,6 +41,7 @@ import org.intellij.plugins.intelliLang.inject.config.AbstractTagInjection;
import org.intellij.plugins.intelliLang.inject.config.BaseInjection;
import org.intellij.plugins.intelliLang.inject.config.InjectionPlace;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.*;
import java.util.regex.Pattern;
@@ -227,8 +228,8 @@ public final class XmlLanguageInjector implements MultiHostInjector {
private static boolean areThereInjectionsWithText(final String text, Trinity<Long, Pattern, Collection<String>> index) {
if (text == null) return false;
if (index.third.contains(text)) return true;
if (index.second.matcher(text).matches()) return true;
return false;
Pattern pattern = index.second;
return pattern != null && pattern.matcher(text).matches();
}
private Trinity<Long, Pattern, Collection<String>> getXmlAnnotatedElementsValue() {
@@ -248,6 +249,7 @@ public final class XmlLanguageInjector implements MultiHostInjector {
return index;
}
@Nullable
private static Pattern buildPattern(Collection<String> stringSet) {
final StringBuilder sb = new StringBuilder();
for (String s : stringSet) {
@@ -255,7 +257,7 @@ public final class XmlLanguageInjector implements MultiHostInjector {
if (sb.length() > 0) sb.append('|');
sb.append("(?:").append(s).append(")");
}
return Pattern.compile(sb.toString());
return sb.length() == 0 ? null : Pattern.compile(sb.toString());
}
}