74 lines
2.2 KiB
Java
74 lines
2.2 KiB
Java
package org.embeddedt.modernfix.util;
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import com.google.common.base.Joiner;
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import com.google.common.base.Splitter;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.Interner;
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import com.google.common.collect.Interners;
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import com.google.common.collect.Streams;
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import java.lang.ref.WeakReference;
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import java.nio.file.Path;
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public class CachedResourcePath {
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private final ImmutableList<String> pathComponents;
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private int hashCode = 0;
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private static final Interner<String> PATH_COMPONENT_INTERNER = Interners.newStrongInterner();
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private static final Splitter SLASH_SPLITTER = Splitter.on('/');
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private static final Joiner SLASH_JOINER = Joiner.on('/');
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private WeakReference<String> fullPathCache = new WeakReference<>(null);
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public CachedResourcePath(Iterable<String> components) {
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ImmutableList.Builder<String> b = ImmutableList.builder();
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for(String s : components) {
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if(s == null || s.length() == 0)
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continue;
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b.add(PATH_COMPONENT_INTERNER.intern(s));
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}
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pathComponents = b.build();
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}
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public CachedResourcePath(Path path) {
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this(() -> Streams.stream(path.iterator()).map(Path::toString).iterator());
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}
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public CachedResourcePath(String s) {
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this(SLASH_SPLITTER.split(s));
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}
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@Override
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public int hashCode() {
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int result = hashCode;
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if(result != 0)
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return result;
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hashCode = pathComponents.hashCode();
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return hashCode;
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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CachedResourcePath that = (CachedResourcePath) o;
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return pathComponents.equals(that.pathComponents);
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}
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public String getFileName() {
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return pathComponents.get(pathComponents.size() - 1);
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}
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public int getNameCount() {
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return pathComponents.size();
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}
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public String getFullPath() {
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String fPath = fullPathCache.get();
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if(fPath == null) {
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fPath = SLASH_JOINER.join(pathComponents);
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fullPathCache = new WeakReference<>(fPath);
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}
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return fPath;
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}
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}
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