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juzu.impl.common.Path Maven / Gradle / Ivy
/*
* Copyright 2013 eXo Platform SAS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package juzu.impl.common;
import java.io.Serializable;
/** @author Julien Viet */
public abstract class Path implements Serializable {
/** . */
private static final String[] EMPTY_STRING_ARRAY = new String[0];
public static Absolute absolute(Name name, String ext) {
return new Absolute(name, ext);
}
public static Absolute absolute(Name qn, String rawName, String ext) {
return new Absolute(qn, rawName, ext);
}
public static Relative relative(Name qn, String rawName, String ext) {
return new Relative(qn, rawName, ext);
}
public static Relative relative(Name name, String ext) {
return new Relative(name, ext);
}
public static Path create(boolean absolute, Name qn, String rawName, String ext) {
if (absolute) {
return absolute(qn, rawName, ext);
} else {
return relative(qn, rawName, ext);
}
}
public static Path parse(String path) throws NullPointerException, IllegalArgumentException {
boolean absolute = path.length() > 0 && path.charAt(0) == '/';
String[] atoms = Lexers.parsePath(Lexers.PARSE_CANONICAL, EMPTY_STRING_ARRAY, 0, path, 0);
if (absolute) {
return new Absolute(new Name(atoms, atoms.length - 1), atoms[atoms.length - 1]);
} else {
return new Relative(new Name(atoms, atoms.length - 1), atoms[atoms.length - 1]);
}
}
/** . */
protected final Name name;
/** . */
protected final String ext;
/** . */
private String canonical;
private Path(Name pkg, String rawName, String ext) {
this.canonical = null;
this.name = pkg.append(rawName);
this.ext = ext;
}
private Path(Name name, String ext) {
this.canonical = null;
this.name = name;
this.ext = ext;
}
public Path append(String path) throws NullPointerException, IllegalArgumentException {
if (path == null) {
throw new NullPointerException("No null path accepted");
}
if (path.length() > 0 && path.charAt(0) == '/') {
throw new IllegalArgumentException("Cannot append absolute path " + path);
}
String[] atoms = Lexers.parsePath(Lexers.PARSE_ANY, name.identifiers, name.size - 1, path, 0);
return create(new Name(atoms, atoms.length - 1), atoms[atoms.length - 1]);
}
public String getValue() {
return getCanonical();
}
/**
* Covariant create.
*
* @param name the name
* @param ext the extension
* @return the path
*/
protected abstract Path create(Name name, String ext);
public final boolean isAbsolute() {
return this instanceof Absolute;
}
public final boolean isRelative() {
return !isAbsolute();
}
/**
* Returns the path directories as a name.
*
* @return the dirs
*/
public Name getDirs() {
return name.getParent();
}
/**
* Returns the path as a name.
*
* @return the name
*/
public Name getName() {
return name;
}
/**
* Returns the path raw name.
*
* @return the raw name
*/
public String getRawName() {
return name.getIdentifier();
}
/**
* Returns the path extension.
*
* @return the extension
*/
public String getExt() {
return ext;
}
/**
* Returns the path simple name: the raw name followed by the extension.
*
* @return the simple name
*/
public String getSimpleName() {
String ext = getExt();
String rawName = getRawName();
if (ext != null) {
return rawName + "." + ext;
}
else {
return rawName;
}
}
public Path as(String ext) {
return create(name, ext);
}
public Path as(String rawName, String ext) {
String[] tmp = new String[name.size];
System.arraycopy(name.identifiers, 0, tmp, 0, name.size - 1);
tmp[tmp.length - 1] = rawName;
return create(new Name(tmp, tmp.length), ext);
}
public String getCanonical() {
if (canonical == null) {
StringBuilder sb = new StringBuilder();
if (isAbsolute()) {
sb.append('/');
}
for (int i = 0;i < name.size();i++) {
if (i > 0) {
sb.append('/');
}
sb.append(name.get(i));
}
String ext = getExt();
if (ext != null) {
sb.append('.').append(ext);
}
canonical = sb.toString();
}
return canonical;
}
@Override
public int hashCode() {
// Should use ext too in hashcode
return name.hashCode();
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
} else if (obj != null && obj.getClass() == getClass()) {
Path that = (Path)obj;
return isAbsolute() == that.isAbsolute() && name.equals(that.name) && Tools.safeEquals(ext, that.ext);
} else {
return false;
}
}
@Override
public String toString() {
return "Path[" + getCanonical() + "]";
}
public static class Absolute extends Path {
public Absolute(Name pkg, String rawName, String ext) {
super(pkg, rawName, ext);
}
public Absolute(Name name, String ext) {
super(name, ext);
}
@Override
protected Absolute create(Name name, String ext) {
return new Absolute(name, ext);
}
@Override
public Absolute as(String ext) {
return (Absolute)super.as(ext);
}
@Override
public Absolute as(String rawName, String ext) {
return (Absolute)super.as(rawName, ext);
}
}
public static class Relative extends Path {
public Relative(Name pkg, String rawName, String ext) {
super(pkg, rawName, ext);
}
public Relative(Name name, String ext) {
super(name, ext);
}
@Override
protected Relative create(Name name, String ext) {
return new Relative(name, ext);
}
@Override
public Relative as(String ext) {
return (Relative)super.as(ext);
}
@Override
public Relative as(String rawName, String ext) {
return (Relative)super.as(rawName, ext);
}
}
}
