de.intarsys.tools.locator.ClassLoaderResourceLocator Maven / Gradle / Ivy
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The basic runtime tools and interfaces for intarsys components.
/*
* Copyright (c) 2007, intarsys consulting GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of intarsys nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package de.intarsys.tools.locator;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.net.URL;
import de.intarsys.tools.file.FileTools;
import de.intarsys.tools.randomaccess.IRandomAccess;
/**
* An {@link ILocator} for java resources identified directly by a class loader.
*
*/
public class ClassLoaderResourceLocator extends CommonLocator {
private final ClassLoader classLoader;
private final String name;
/** The encoding of the designated source */
private String encoding;
private ILocator tempFileLocator;
public ClassLoaderResourceLocator(ClassLoader classLoader, String name) {
super();
this.classLoader = classLoader;
this.name = name;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (!(obj instanceof ClassLoaderResourceLocator)) {
return false;
}
return name.equals(((ClassLoaderResourceLocator) obj).name)
&& classLoader
.equals(((ClassLoaderResourceLocator) obj).classLoader);
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#exists()
*/
public boolean exists() {
return getClassLoader().getResource(getName()) != null;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getChild(java.lang.String)
*/
public ILocator getChild(String childName) {
String child = getName() + "/" + childName;
ClassLoaderResourceLocator result = new ClassLoaderResourceLocator(
getClassLoader(), child);
return result;
}
/**
* The {@link ClassLoader} used to access the resource.
*
* @return The {@link ClassLoader} used to access the resource.
*/
public ClassLoader getClassLoader() {
return classLoader;
}
protected String getEncoding() {
return encoding;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getFullName()
*/
public String getFullName() {
return getName();
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getInputStream()
*/
public InputStream getInputStream() throws IOException {
return getClassLoader().getResourceAsStream(getName());
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getLocalName()
*/
public String getLocalName() {
if (getName() == null) {
return "unknown";
} else {
return FileTools.getBaseName(getName());
}
}
/**
* The resource name defined when constructing this.
*
* @return The resource name defined when constructing this.
*/
public String getName() {
return name;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getOutputStream()
*/
public OutputStream getOutputStream() throws IOException {
throw new IOException("locator is read only");
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getParent()
*/
public ILocator getParent() {
int index = getName().lastIndexOf("/");
if (index > -1) {
String parentname = getName().substring(0, index);
return new ClassLoaderResourceLocator(getClassLoader(), parentname);
} else {
return null;
}
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getRandomAccessData()
*/
synchronized public IRandomAccess getRandomAccess() throws IOException {
if (tempFileLocator == null) {
tempFileLocator = createTempFileLocator();
}
return tempFileLocator.getRandomAccess();
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getReader()
*/
public Reader getReader() throws IOException {
if (getEncoding() == null) {
return new InputStreamReader(getInputStream());
} else {
return new InputStreamReader(getInputStream(), getEncoding());
}
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getReader(java.lang.String)
*/
public Reader getReader(String newEncoding) throws IOException {
if ((newEncoding == null) || newEncoding.equals("")) {
return getReader();
} else {
return new InputStreamReader(getInputStream(), newEncoding);
}
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getType()
*/
public String getType() {
if (getName() == null) {
return "";
}
return FileTools.getExtension(new File(getName()));
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getTypedName()
*/
public String getTypedName() {
if (getName() == null) {
return "";
}
return new File(getName()).getName();
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getWriter()
*/
public Writer getWriter() throws IOException {
throw new IOException("locator is read only");
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#getWriter(java.lang.String)
*/
public Writer getWriter(String pEncoding) throws IOException {
throw new IOException("locator is read only");
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return name.hashCode();
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#isDirectory()
*/
public boolean isDirectory() {
return false;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.component.ISynchronizable#isOutOfSynch()
*/
public boolean isOutOfSynch() {
return false;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#isReadOnly()
*/
@Override
public boolean isReadOnly() {
return true;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.component.ISynchronizable#isSynchSynchronous()
*/
public boolean isSynchSynchronous() {
return false;
}
/*
* (non-Javadoc)
*
* @see
* de.intarsys.tools.locator.ILocator#listLocators(de.intarsys.tools.locator
* .ILocatorNameFilter)
*/
public ILocator[] listLocators(final ILocatorNameFilter filter)
throws IOException {
return new ILocator[0];
}
protected void setEncoding(String encoding) {
this.encoding = encoding;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.component.ISynchronizable#synch()
*/
public void synch() {
// do nothing
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return getName();
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.locator.ILocator#toURL()
*/
public URL toURL() {
return null;
}
}
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