102 lines
3.3 KiB
Java
102 lines
3.3 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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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.List;
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public class CachedResourcePath {
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private final 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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private static final String[] NO_PREFIX = new String[0];
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public CachedResourcePath(Path path) {
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this(NO_PREFIX, path, path.getNameCount());
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}
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public CachedResourcePath(String s) {
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// normalize so we can guarantee there are no empty sections
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this(NO_PREFIX, SLASH_SPLITTER.splitToList(FileUtil.normalize(s)));
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}
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public <T> CachedResourcePath(String[] prefixElements, Collection<T> collection) {
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this(prefixElements, collection, collection.size());
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}
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public <T> CachedResourcePath(String[] prefixElements, Iterable<T> path, int count) {
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String[] components = new String[prefixElements.length + count];
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int i = 0;
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while(i < prefixElements.length) {
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components[i] = PATH_COMPONENT_INTERNER.intern(prefixElements[i]);
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i++;
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}
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for(Object component : path) {
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String s = component.toString();
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if(s.length() == 0)
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continue;
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components[i] = PATH_COMPONENT_INTERNER.intern(s);
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i++;
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}
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pathComponents = components;
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}
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public CachedResourcePath(String[] prefixElements, CachedResourcePath other) {
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String[] components = new String[prefixElements.length + other.pathComponents.length];
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int i = 0;
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while(i < prefixElements.length) {
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components[i] = PATH_COMPONENT_INTERNER.intern(prefixElements[i]);
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i++;
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}
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System.arraycopy(other.pathComponents, 0, components, i, other.pathComponents.length);
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pathComponents = components;
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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 = Arrays.hashCode(pathComponents);
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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 Arrays.equals(pathComponents, that.pathComponents);
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}
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public String getFileName() {
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return pathComponents[pathComponents.length - 1];
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}
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public int getNameCount() {
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return pathComponents.length;
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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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