diff options
Diffstat (limited to 'libjava/classpath/java/rmi/activation/ActivationGroupDesc.java')
| -rw-r--r-- | libjava/classpath/java/rmi/activation/ActivationGroupDesc.java | 449 |
1 files changed, 374 insertions, 75 deletions
diff --git a/libjava/classpath/java/rmi/activation/ActivationGroupDesc.java b/libjava/classpath/java/rmi/activation/ActivationGroupDesc.java index 35b546e..76ac63b 100644 --- a/libjava/classpath/java/rmi/activation/ActivationGroupDesc.java +++ b/libjava/classpath/java/rmi/activation/ActivationGroupDesc.java @@ -1,5 +1,6 @@ -/* ActivationGroupDesc.java -- - Copyright (c) 1996, 1997, 1998, 1999, 2004 Free Software Foundation, Inc. +/* ActivationGroupDesc.java -- the RMI activation group descriptor + Copyright (c) 1996, 1997, 1998, 1999, 2004, 2006 + Free Software Foundation, Inc. This file is part of GNU Classpath. @@ -38,97 +39,395 @@ exception statement from your version. */ package java.rmi.activation; +import gnu.java.rmi.activation.DefaultActivationGroup; + import java.io.Serializable; import java.rmi.MarshalledObject; +import java.util.Arrays; +import java.util.Enumeration; +import java.util.Iterator; import java.util.Properties; +import java.util.TreeSet; +import java.util.zip.Adler32; -public final class ActivationGroupDesc implements Serializable +/** + * Contains information, necessary to create of recreate the activation objects. + * The group descriptor contains: + * <ul> + * <li>The name of the group's class. This class is derived from the + * {@link ActivationGroup}.</li> + * <li>The group class code location.</li> + * <li>The marshalled object that contains the group specific initialization + * information</li> + * </ul> + * The groups are created by the {@link ActivationGroup#createGroup} method that + * expectes the group class to have the two parameter constructor, the first + * parameter being the {@link ActivationGroupID} and the second the + * {@link MarshalledObject}. + * + * @author Audrius Meskauskas (audriusa@bioinformatics.org) (from stub) + */ +public final class ActivationGroupDesc + implements Serializable { - static final long serialVersionUID = -4936225423168276595L; + /** + * Contains the startup options for the {@link ActivationGroup} + * implementations. Allows to override system properties and specify other + * options for the implementation groups. + * + * @author Audrius Meskauskas (audriusa@bioinformatics.org) (from stub) + */ + public static class CommandEnvironment + implements Serializable + { -public static class CommandEnvironment - implements Serializable { + /** + * Use the SVUID for interoperability. + */ + static final long serialVersionUID = 6165754737887770191L; + + /** + * The zero size string array used as argv value when null is passed. + */ + private static final String[] NO_ARGS = new String[0]; -static final long serialVersionUID = 6165754737887770191L; - -private String cmdpath; -private String[] argv; + /** + * The path to the java executable (or null for using default jre). + */ + final String command; + + /** + * The extra parameters (may be empty array but never null). + */ + final String[] options; + + /** + * Create the new command environment. + * + * @param commandPatch the full path (and name) to the java executable of + * null for using the default executable. + * @param args extra options that will be used when creating the activation + * group. Null has the same effect as the empty list. + */ + public CommandEnvironment(String commandPatch, String[] args) + { + command = commandPatch; + if (args != null) + options = args; + else + options = NO_ARGS; + } + + /** + * Get the path to the java executable. + * + * @return the path to the java executable or null for using the default + * jre. + */ + public String getCommandPath() + { + return command; + } + + /** + * Get the additional command options. + * + * @return the command options array, may be empty string + */ + public String[] getCommandOptions() + { + return options; + } + + /** + * Compare for content equality. + */ + public boolean equals(Object obj) + { + if (obj instanceof CommandEnvironment) + { + CommandEnvironment that = (CommandEnvironment) obj; -public CommandEnvironment(String cmdpath, String[] argv) { - this.cmdpath = cmdpath; - this.argv = argv; -} - -public String getCommandPath() { - return (cmdpath); -} - -public String[] getCommandOptions() { - return (argv); -} - -public boolean equals(Object obj) { - if (!(obj instanceof CommandEnvironment)) { - return (false); - } - CommandEnvironment that = (CommandEnvironment)obj; - - if (!this.cmdpath.equals(that.cmdpath)) { - return (false); - } - - int len = this.argv.length; - if (len != that.argv.length) { - return (false); - } - for (int i = 0; i < len; i++) { - if (!this.argv[i].equals(that.argv[i])) { - return (false); - } - } - return (true); -} + if (command == null || that.command == null) + { + // Use direct comparison if null is involved. + if (command != that.command) + return false; + } + else + { + // Use .equals if null is not involved. + if (! this.command.equals(that.command)) + return false; + } -public int hashCode() { - return (cmdpath.hashCode()); // Not a very good hash code. -} + return Arrays.equals(options, that.options); + } + else + return false; + } -} + /** + * Get the hash code. + */ + public int hashCode() + { + int h = command == null ? 0 : command.hashCode(); + for (int i = 0; i < options.length; i++) + h ^= options[i].hashCode(); -public ActivationGroupDesc(Properties overrides, ActivationGroupDesc.CommandEnvironment cmd) { - throw new Error("Not implemented"); -} + return h; + } + } + + /** + * Use the SVUID for interoperability. + */ + static final long serialVersionUID = - 4936225423168276595L; + + /** + * The group class name or null for the default group class implementation. + */ + final String className; + + /** + * The group class download location URL (codebase), ignored by the + * default implementation. + */ + final String location; + + /** + * The group initialization data. + */ + final MarshalledObject data; + + /** + * The path to the group jre and the parameters of this jre, may be + * null for the default jre. + */ + final ActivationGroupDesc.CommandEnvironment env; + + /** + * The properties that override the system properties. + */ + final Properties props; + + /** + * The cached hash code. + */ + transient long hash; + + /** + * Create the new activation group descriptor that will use the default + * activation group implementation with the given properties and + * environment. + * + * @param aProperties the properties that override the system properties + * @param environment the command line (and parameters), indicating, where to + * find the jre executable and with that parameters to call it. May + * be null if the default executable should be used. In this case, + * the activation group with the null name (the system default group) + * will be created. + */ + public ActivationGroupDesc(Properties aProperties, + ActivationGroupDesc.CommandEnvironment environment) + { + this(DefaultActivationGroup.class.getName(), null, null, aProperties, + environment); + } + + /** + * Create the new activation group descriptor. + * + * @param aClassName the name of the group implementation class. The null + * value indicates the default implementation. + * @param aLocation the location, from where the group implementation class + * should be loaded (ignored for the system default implementation). + * @param aData the group intialization data + * @param aProperties the properties that will override the system properties + * of the new group. These properties will be translated into -D + * options. + * @param environment the record, containing path to the jre executable and + * start options for the jre or null for using the default jre and + * options. + */ + public ActivationGroupDesc(String aClassName, String aLocation, + MarshalledObject aData, Properties aProperties, + ActivationGroupDesc.CommandEnvironment environment) + { + className = aClassName; + location = aLocation; + data = aData; + props = aProperties; + env = environment; + } + + /** + * Get the activation group class name. + * + * @return the activation group class name (null for default implementation) + */ + public String getClassName() + { + return className; + } + + /** + * Get the location, from where the group class will be loaded + * + * @return the location, from where the implementation should be loaded (null + * for the default implementation) + */ + public String getLocation() + { + return location; + } + + /** + * Get the group intialization data. + * + * @return the group intialization data in the marshalled form. + */ + public MarshalledObject getData() + { + return data; + } -public ActivationGroupDesc(String className, String location, MarshalledObject data, Properties overrides, ActivationGroupDesc.CommandEnvironment cmd) { - throw new Error("Not implemented"); -} + /** + * Get the overridded system properties. + * + * @return the overridden group system properties. + */ + public Properties getPropertyOverrides() + { + return props; + } + + /** + * Get the group command environment, containing path to the jre executable + * and startup options. + * + * @return the command environment or null if the default environment should + * be used. + */ + public ActivationGroupDesc.CommandEnvironment getCommandEnvironment() + { + return env; + } + + /** + * Compare for the content equality. + */ + public boolean equals(Object obj) + { + if (obj instanceof ActivationGroupDesc) + { + ActivationGroupDesc that = (ActivationGroupDesc) obj; -public String getClassName() { - throw new Error("Not implemented"); -} + // Ensure the hashcodes are computed. + if (hash == 0) + hashCode(); + if (that.hash == 0) + that.hashCode(); -public String getLocation() { - throw new Error("Not implemented"); -} + // We compare the hash fields as they are type long rather than int. + if (hash != that.hash) + return false; -public MarshalledObject getData() { - throw new Error("Not implemented"); -} + if (! eq(className, that.className)) + return false; + if (! eq(data, that.data)) + return false; + if (! eq(env, that.env)) + return false; + if (! eq(location, that.location)) + return false; -public Properties getPropertyOverrides() { - throw new Error("Not implemented"); -} + // Compare the properties. + if (eq(props, that.props)) + return true; -public ActivationGroupDesc.CommandEnvironment getCommandEnvironment() { - throw new Error("Not implemented"); -} + if (props.size() != that.props.size()) + return false; -public boolean equals(Object obj) { - throw new Error("Not implemented"); -} + Enumeration en = props.propertyNames(); + Object key, value; -public int hashCode() { - throw new Error("Not implemented"); -} + while (en.hasMoreElements()) + { + key = en.nextElement(); + if (! that.props.containsKey(key)) + return false; + if (! eq(props.get(key), that.props.get(key))) + return false; + } + return true; + } + else + return false; + } + + /** + * Compare for direct equality if one or both parameters are null, otherwise + * call .equals. + */ + static boolean eq(Object a, Object b) + { + if (a == null || b == null) + return a == b; + else + return a.equals(b); + } + + /** + * Return the hashcode. + */ + public int hashCode() + { + if (hash==0) + { + // Using Adler32 - the hashcode is cached, will be computed only + // once and due need to scan properties is the expensive operation + // anyway. Reliability is more important. + Adler32 adler = new Adler32(); + if (className!=null) + adler.update(className.getBytes()); + if (data!=null) + adler.update(data.hashCode()); + if (env!=null) + adler.update(env.hashCode()); + if (location!=null) + adler.update(location.getBytes()); + if (props!=null) + { + Enumeration en = props.propertyNames(); + + // Using the intermediate sorted set to ensure that the + // properties are sorted. + TreeSet pr = new TreeSet(); + + Object key; + Object value; + while (en.hasMoreElements()) + { + key = en.nextElement(); + if (key!=null) + pr.add(key); + } + + Iterator it = pr.iterator(); + while (it.hasNext()) + { + key = it.next(); + value = props.get(key); + adler.update(key.hashCode()); + if (value!=null) + adler.update(value.hashCode()); + } + } + hash = adler.getValue(); + } + return (int) hash; + } } |