/*
* @(#)Attributes.java 1.50 04/05/05
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package java.util.jar;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.Collection;
import java.util.AbstractSet;
import java.util.Iterator;
import java.util.logging.Logger;
import java.util.Comparator;
import sun.misc.ASCIICaseInsensitiveComparator;
/**
* The Attributes class maps Manifest attribute names to associated string
* values. Valid attribute names are case-insensitive, are restricted to
* the ASCII characters in the set [0-9a-zA-Z_-], and cannot exceed 70
* characters in length. Attribute values can contain any characters and
* will be UTF8-encoded when written to the output stream. See the
* <a href="../../../../guide/jar/jar.html">JAR File Specification</a>
* for more information about valid attribute names and values.
*
* @author David Connelly
* @version 1.50, 05/05/04
* @see Manifest
* @since 1.2
*/
public class Attributes implements Map<Object,Object>, Cloneable {
/**
* The attribute name-value mappings.
*/
protected Map<Object,Object> map;
/**
* Constructs a new, empty Attributes object with default size.
*/
public Attributes() {
this(11);
}
/**
* Constructs a new, empty Attributes object with the specified
* initial size.
*
* @param size the initial number of attributes
*/
public Attributes(int size) {
map = new HashMap(size);
}
/**
* Constructs a new Attributes object with the same attribute name-value
* mappings as in the specified Attributes.
*
* @param attr the specified Attributes
*/
public Attributes(Attributes attr) {
map = new HashMap(attr);
}
/**
* Returns the value of the specified attribute name, or null if the
* attribute name was not found.
*
* @param name the attribute name
* @return the value of the specified attribute name, or null if
* not found.
*/
public Object get(Object name) {
return map.get(name);
}
/**
* Returns the value of the specified attribute name, specified as
* a string, or null if the attribute was not found. The attribute
* name is case-insensitive.
* <p>
* This method is defined as:
* <pre>
* return (String)get(new Attributes.Name((String)name));
* </pre>
*
* @param name the attribute name as a string
* @return the String value of the specified attribute name, or null if
* not found.
* @throws IllegalArgumentException if the attribute name is invalid
*/
public String getValue(String name) {
return (String)get(new Attributes.Name((String)name));
}
/**
* Returns the value of the specified Attributes.Name, or null if the
* attribute was not found.
* <p>
* This method is defined as:
* <pre>
* return (String)get(name);
* </pre>
*
* @param name the Attributes.Name object
* @return the String value of the specified Attribute.Name, or null if
* not found.
*/
public String getValue(Name name) {
return (String)get(name);
}
/**
* Associates the specified value with the specified attribute name
* (key) in this Map. If the Map previously contained a mapping for
* the attribute name, the old value is replaced.
*
* @param name the attribute name
* @param value the attribute value
* @return the previous value of the attribute, or null if none
* @exception ClassCastException if the name is not a Attributes.Name
* or the value is not a String
*/
public Object put(Object name, Object value) {
return map.put((Attributes.Name)name, (String)value);
}
/**
* Associates the specified value with the specified attribute name,
* specified as a String. The attributes name is case-insensitive.
* If the Map previously contained a mapping for the attribute name,
* the old value is replaced.
* <p>
* This method is defined as:
* <pre>
* return (String)put(new Attributes.Name(name), value);
* </pre>
*
* @param name the attribute name as a string
* @param value the attribute value
* @return the previous value of the attribute, or null if none
* @exception IllegalArgumentException if the attribute name is invalid
*/
public String putValue(String name, String value) {
return (String)put(new Name(name), value);
}
/**
* Removes the attribute with the specified name (key) from this Map.
* Returns the previous attribute value, or null if none.
*
* @param name attribute name
* @return the previous value of the attribute, or null if none
*/
public Object remove(Object name) {
return map.remove(name);
}
/**
* Returns true if this Map maps one or more attribute names (keys)
* to the specified value.
*
* @param value the attribute value
* @return true if this Map maps one or more attribute names to
* the specified value
*/
public boolean containsValue(Object value) {
return map.containsValue(value);
}
/**
* Returns true if this Map contains the specified attribute name (key).
*
* @param name the attribute name
* @return true if this Map contains the specified attribute name
*/
public boolean containsKey(Object name) {
return map.containsKey(name);
}
/**
* Copies all of the attribute name-value mappings from the specified
* Attributes to this Map. Duplicate mappings will be replaced.
*
* @param attr the Attributes to be stored in this map
* @exception ClassCastException if attr is not an Attributes
*/
public void putAll(Map<?,?> attr) {
// ## javac bug?
if (!Attributes.class.isInstance(attr))
throw new ClassCastException();
for (Map.Entry<?,?> me : (attr).entrySet())
put(me.getKey(), me.getValue());
}
/**
* Removes all attributes from this Map.
*/
public void clear() {
map.clear();
}
/**
* Returns the number of attributes in this Map.
*/
public int size() {
return map.size();
}
/**
* Returns true if this Map contains no attributes.
*/
public boolean isEmpty() {
return map.isEmpty();
}
/**
* Returns a Set view of the attribute names (keys) contained in this Map.
*/
public Set<Object> keySet() {
return map.keySet();
}
/**
* Returns a Collection view of the attribute values contained in this Map.
*/
public Collection<Object> values() {
return map.values();
}
/**
* Returns a Collection view of the attribute name-value mappings
* contained in this Map.
*/
public Set<Map.Entry<Object,Object>> entrySet() {
return map.entrySet();
}
/**
* Compares the specified Attributes object with this Map for equality.
* Returns true if the given object is also an instance of Attributes
* and the two Attributes objects represent the same mappings.
*
* @param o the Object to be compared
* @return true if the specified Object is equal to this Map
*/
public boolean equals(Object o) {
return map.equals(o);
}
/**
* Returns the hash code value for this Map.
*/
public int hashCode() {
return map.hashCode();
}
/**
* Returns a copy of the Attributes, implemented as follows:
* <pre>
* public Object clone() { return new Attributes(this); }
* </pre>
* Since the attribute names and values are themselves immutable,
* the Attributes returned can be safely modified without affecting
* the original.
*/
public Object clone() {
return new Attributes(this);
}
/*
* Writes the current attributes to the specified data output stream.
* XXX Need to handle UTF8 values and break up lines longer than 72 bytes
*/
void write(DataOutputStream os) throws IOException {
Iterator it = entrySet().iterator();
while (it.hasNext()) {
Map.Entry e = (Map.Entry)it.next();
StringBuffer buffer = new StringBuffer(
((Name)e.getKey()).toString());
buffer.append(": ");
String value = (String)e.getValue();
if (value != null) {
byte[] vb = value.getBytes("UTF8");
value = new String(vb, 0, 0, vb.length);
}
buffer.append(value);
buffer.append("\r\n");
Manifest.make72Safe(buffer);
os.writeBytes(buffer.toString());
}
os.writeBytes("\r\n");
}
/*
* Writes the current attributes to the specified data output stream,
* make sure to write out the MANIFEST_VERSION or SIGNATURE_VERSION
* attributes first.
*
* XXX Need to handle UTF8 values and break up lines longer than 72 bytes
*/
void writeMain(DataOutputStream out) throws IOException
{
// write out the *-Version header first, if it exists
String vername = Name.MANIFEST_VERSION.toString();
String version = getValue(vername);
if (version == null) {
vername = Name.SIGNATURE_VERSION.toString();
version = getValue(vername);
}
if (version != null) {
out.writeBytes(vername+": "+version+"\r\n");
}
// write out all attributes except for the version
// we wrote out earlier
Iterator it = entrySet().iterator();
while (it.hasNext()) {
Map.Entry e = (Map.Entry)it.next();
String name = ((Name)e.getKey()).toString();
if ((version != null) && ! (name.equalsIgnoreCase(vername))) {
StringBuffer buffer = new StringBuffer(name);
buffer.append(": ");
String value = (String)e.getValue();
if (value != null) {
byte[] vb = value.getBytes("UTF8");
value = new String(vb, 0, 0, vb.length);
}
buffer.append(value);
buffer.append("\r\n");
Manifest.make72Safe(buffer);
out.writeBytes(buffer.toString());
}
}
out.writeBytes("\r\n");
}
/*
* Reads attributes from the specified input stream.
* XXX Need to handle UTF8 values.
*/
void read(Manifest.FastInputStream is, byte[] lbuf) throws IOException {
String name = null, value = null;
byte[] lastline = null;
int len;
while ((len = is.readLine(lbuf)) != -1) {
boolean lineContinued = false;
if (lbuf[--len] != '\n') {
throw new IOException("line too long");
}
if (len > 0 && lbuf[len-1] == '\r') {
--len;
}
if (len == 0) {
break;
}
int i = 0;
if (lbuf[0] == ' ') {
// continuation of previous line
if (name == null) {
throw new IOException("misplaced continuation line");
}
lineContinued = true;
byte[] buf = new byte[lastline.length + len - 1];
System.arraycopy(lastline, 0, buf, 0, lastline.length);
System.arraycopy(lbuf, 1, buf, lastline.length, len - 1);
if (is.peek() == ' ') {
lastline = buf;
continue;
}
value = new String(buf, 0, buf.length, "UTF8");
lastline = null;
} else {
while (lbuf[i++] != ':') {
if (i >= len) {
throw new IOException("invalid header field");
}
}
if (lbuf[i++] != ' ') {
throw new IOException("invalid header field");
}
name = new String(lbuf, 0, 0, i - 2);
if (is.peek() == ' ') {
lastline = new byte[len - i];
System.arraycopy(lbuf, i, lastline, 0, len - i);
continue;
}
value = new String(lbuf, i, len - i, "UTF8");
}
try {
if ((putValue(name, value) != null) && (!lineContinued)) {
Logger.getLogger("java.util.jar").warning(
"Duplicate name in Manifest: " + name);
}
} catch (IllegalArgumentException e) {
throw new IOException("invalid header field name: " + name);
}
}
}
/**
* The Attributes.Name class represents an attribute name stored in
* this Map. Valid attribute names are case-insensitive, are restricted
* to the ASCII characters in the set [0-9a-zA-Z_-], and cannot exceed
* 70 characters in length. Attribute values can contain any characters
* and will be UTF8-encoded when written to the output stream. See the
* <a href="../../../../guide/jar/jar.html">JAR File Specification</a>
* for more information about valid attribute names and values.
*/
public static class Name {
private String name;
private int hashCode = -1;
/**
* Constructs a new attribute name using the given string name.
*
* @param name the attribute string name
* @exception IllegalArgumentException if the attribute name was
* invalid
* @exception NullPointerException if the attribute name was null
*/
public Name(String name) {
if (name == null) {
throw new NullPointerException("name");
}
if (!isValid(name)) {
throw new IllegalArgumentException(name);
}
this.name = name.intern();
}
private static boolean isValid(String name) {
int len = name.length();
if (len > 70 || len == 0) {
return false;
}
for (int i = 0; i < len; i++) {
if (!isValid(name.charAt(i))) {
return false;
}
}
return true;
}
private static boolean isValid(char c) {
return isAlpha(c) || isDigit(c) || c == '_' || c == '-';
}
private static boolean isAlpha(char c) {
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}
private static boolean isDigit(char c) {
return c >= '0' && c <= '9';
}
/**
* Compares this attribute name to another for equality.
* @param o the object to compare
* @return true if this attribute name is equal to the
* specified attribute object
*/
public boolean equals(Object o) {
if (o instanceof Name) {
Comparator c = ASCIICaseInsensitiveComparator.CASE_INSENSITIVE_ORDER;
return c.compare(name, ((Name)o).name) == 0;
} else {
return false;
}
}
/**
* Computes the hash value for this attribute name.
*/
public int hashCode() {
if (hashCode == -1) {
hashCode = ASCIICaseInsensitiveComparator.lowerCaseHashCode(name);
}
return hashCode;
}
/**
* Returns the attribute name as a String.
*/
public String toString() {
return name;
}
/**
* <code>Name</code> object for <code>Manifest-Version</code>
* manifest attribute. This attribute indicates the version number
* of the manifest standard to which a JAR file's manifest conforms.
* @see <a href="../../../../guide/jar/jar.html#JAR Manifest">
* Manifest and Signature Specification</a>
*/
public static final Name MANIFEST_VERSION = new Name("Manifest-Version");
/**
* <code>Name</code> object for <code>Signature-Version</code>
* manifest attribute used when signing JAR files.
* @see <a href="../../../../guide/jar/jar.html#JAR Manifest">
* Manifest and Signature Specification</a>
*/
public static final Name SIGNATURE_VERSION = new Name("Signature-Version");
/**
* <code>Name</code> object for <code>Content-Type</code>
* manifest attribute.
*/
public static final Name CONTENT_TYPE = new Name("Content-Type");
/**
* <code>Name</code> object for <code>Class-Path</code>
* manifest attribute. Bundled extensions can use this attribute
* to find other JAR files containing needed classes.
* @see <a href="../../../../guide/extensions/spec.html#bundled">
* Extensions Specification</a>
*/
public static final Name CLASS_PATH = new Name("Class-Path");
/**
* <code>Name</code> object for <code>Main-Class</code> manifest
* attribute used for launching applications packaged in JAR files.
* The <code>Main-Class</code> attribute is used in conjunction
* with the <code>-jar</code> command-line option of the
* <tt>java</tt> application launcher.
*/
public static final Name MAIN_CLASS = new Name("Main-Class");
/**
* <code>Name</code> object for <code>Sealed</code> manifest attribute
* used for sealing.
* @see <a href="../../../../guide/extensions/spec.html#sealing">
* Extension Sealing</a>
*/
public static final Name SEALED = new Name("Sealed");
/**
* <code>Name</code> object for <code>Extension-List</code> manifest attribute
* used for declaring dependencies on installed extensions.
* @see <a href="../../../../guide/extensions/spec.html#dependency">
* Installed extension dependency</a>
*/
public static final Name EXTENSION_LIST = new Name("Extension-List");
/**
* <code>Name</code> object for <code>Extension-Name</code> manifest attribute
* used for declaring dependencies on installed extensions.
* @see <a href="../../../../guide/extensions/spec.html#dependency">
* Installed extension dependency</a>
*/
public static final Name EXTENSION_NAME = new Name("Extension-Name");
/**
* <code>Name</code> object for <code>Extension-Name</code> manifest attribute
* used for declaring dependencies on installed extensions.
* @see <a href="../../../../guide/extensions/spec.html#dependency">
* Installed extension dependency</a>
*/
public static final Name EXTENSION_INSTALLATION = new Name("Extension-Installation");
/**
* <code>Name</code> object for <code>Implementation-Title</code>
* manifest attribute used for package versioning.
* @see <a href="../../../../guide/versioning/spec/VersioningSpecification.html#PackageVersioning">
* Java Product Versioning Specification</a>
*/
public static final Name IMPLEMENTATION_TITLE = new Name("Implementation-Title");
/**
* <code>Name</code> object for <code>Implementation-Version</code>
* manifest attribute used for package versioning.
* @see <a href="../../../../guide/versioning/spec/VersioningSpecification.html#PackageVersioning">
* Java Product Versioning Specification</a>
*/
public static final Name IMPLEMENTATION_VERSION = new Name("Implementation-Version");
/**
* <code>Name</code> object for <code>Implementation-Vendor</code>
* manifest attribute used for package versioning.
* @see <a href="../../../../guide/versioning/spec/VersioningSpecification.html#PackageVersioning">
* Java Product Versioning Specification</a>
*/
public static final Name IMPLEMENTATION_VENDOR = new Name("Implementation-Vendor");
/**
* <code>Name</code> object for <code>Implementation-Vendor-Id</code>
* manifest attribute used for package versioning.
* @see <a href="../../../../guide/versioning/spec/VersioningSpecification.html#PackageVersioning">
* Java Product Versioning Specification</a>
*/
public static final Name IMPLEMENTATION_VENDOR_ID = new Name("Implementation-Vendor-Id");
/**
* <code>Name</code> object for <code>Implementation-Vendor-URL</code>
* manifest attribute used for package versioning.
* @see <a href="../../../../guide/versioning/spec/VersioningSpecification.html#PackageVersioning">
* Java Product Versioning Specification</a>
*/
public static final Name IMPLEMENTATION_URL = new Name("Implementation-URL");
/**
* <code>Name</code> object for <code>Specification-Title</code>
* manifest attribute used for package versioning.
* @see <a href="../../../../guide/versioning/spec/VersioningSpecification.html#PackageVersioning">
* Java Product Versioning Specification</a>
*/
public static final Name SPECIFICATION_TITLE = new Name("Specification-Title");
/**
* <code>Name</code> object for <code>Specification-Version</code>
* manifest attribute used for package versioning.
* @see <a href="../../../../guide/versioning/spec/VersioningSpecification.html#PackageVersioning">
* Java Product Versioning Specification</a>
*/
public static final Name SPECIFICATION_VERSION = new Name("Specification-Version");
/**
* <code>Name</code> object for <code>Specification-Vendor</code>
* manifest attribute used for package versioning.
* @see <a href="../../../../guide/versioning/spec/VersioningSpecification.html#PackageVersioning">
* Java Product Versioning Specification</a>
*/
public static final Name SPECIFICATION_VENDOR = new Name("Specification-Vendor");
}
}
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