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Public UNO Java Classes (formerly jurt,juh,ridl,unoil)

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/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you 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 .
 */

package com.sun.star.uno;

import java.io.IOException;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.UUID;
import java.util.WeakHashMap;

import com.sun.star.lib.uno.typedesc.FieldDescription;
import com.sun.star.lib.uno.typedesc.TypeDescription;
import com.sun.star.lib.util.WeakMap;

/**
 * The central class needed for implementing or using UNO components in Java.
 *
 * 
The methods queryInterface and areSame delegate
 * calls to the implementing objects and are used instead of casts,
 * instanceof, ==, and equals.

 *
 * 
For historic reasons, this class is not final, and has a
 * public constructor.  These artifacts are considered mistakes,
 * which might be corrected in a future version of this class, so client code
 * should not rely on them.

 *
 * @see com.sun.star.uno.IBridge
 * @see com.sun.star.uno.IEnvironment
 * @see com.sun.star.uno.IQueryInterface
 */
public class UnoRuntime {
    /**
     * @deprecated As of UDK 3.2.0, do not create instances of this class.
     * It is considered a historic mistake to have a public
     * constructor for this class, which only has static members.
     * Also, this class might be changed to become final in a
     * future version.
     */
    @Deprecated
    public UnoRuntime() {}

    /**
     * Generates a worldwide unique identifier string.
     *
     * 
It is guaranteed that every invocation of this method generates a new
     * ID, which is unique within the VM.  The quality of “worldwide
     * unique” will depend on the actual implementation, you should look
     * at the source to determine if it meets your requirements.

     *
     * @return a unique String
     */
    public static String getUniqueKey() {
        synchronized (uniqueKeyLock) {
            if (uniqueKeyCount == Long.MAX_VALUE) {
                long time;
                for (time = System.currentTimeMillis(); time == uniqueKeyTime;)
                {
                    // Conservatively sleep for 100 millisecond to wait for
                    // System.currentTimeMillis() to change:
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        Thread.currentThread().interrupt();
                    }
                }
                uniqueKeyTime = time;
                uniqueKeyCount = Long.MIN_VALUE;
            }
            return uniqueKeyHostPrefix + Long.toString(uniqueKeyTime, 16) + ":"
                + Long.toString(uniqueKeyCount++, 16);
        }
    }

    /**
     * Generates a worldwide unique object identifier (OID) for the given
     * Java object.
     *
     * 
It is guaranteed that subsequent calls to this method with the same
     * Java object will give the same ID.

     *
     * 
This method is generally of little use for client code.  It should be
     * considered a mistake that this method is published at all.

     *
     * @param object any object for which an OID shall be generated; must not be
     * null
     * @return the generated OID
     * @see com.sun.star.uno.IQueryInterface#getOid
     */
    public static String generateOid(Object object) {
        String oid = null;
        if (object instanceof IQueryInterface) {
            oid = ((IQueryInterface) object).getOid();
        }
        if (oid == null) {
            synchronized (oidMap) {
                 oid = oidMap.get(object);
                 if (oid == null) {
                     oid = UUID.randomUUID().toString() + oidSuffix;
                     oidMap.put(object, oid);
                 }
            }
        }
        return oid;
    }

    /**
     * Queries the given UNO object for the given UNO interface type.
     *
     * 
This method returns null in case the given UNO object
     * does not support the given UNO interface type (or is itself
     * null).  Otherwise, a reference to a Java object implementing
     * the Java interface type corresponding to the given UNO interface is
     * returned.  In the latter case, it is unspecified whether the returned
     * Java object is the same as the given object, or is another facet of that
     * UNO object.

     *
     * @param type the requested UNO interface type; must be a Type
     * object representing a UNO interface type
     * @param object a reference to any Java object representing (a facet of) a
     * UNO object; may be null
     * @return a reference to the requested UNO interface type if available,
     * otherwise null
     * @see com.sun.star.uno.IQueryInterface#queryInterface
     */
    public static Object queryInterface(Type type, Object object) {
        // Gracefully handle those situations where the passed in UNO object is
        // wrapped in an Any.  Strictly speaking, such a situation constitutes a
        // bug, but it is anticipated that such situations will arise quite
        // often in practice (especially since UNO Anys containing an XInterface
        // reference are not wrapped in a Java Any, but UNO Anys containing any
        // other interface reference are wrapped in a Java Any, which can lead
        // to confusion).
        if (object instanceof Any) {
            Any a = (Any) object;
            if (a.getType().getTypeClass() == TypeClass.INTERFACE) {
                object = a.getObject();
            }
        }
        if (object instanceof IQueryInterface) {
            object = ((IQueryInterface) object).queryInterface(type);
            if (object instanceof Any) {
                Any a = (Any) object;
                object = a.getType().getTypeClass() == TypeClass.INTERFACE
                    ? a.getObject() : null;
            }
        }
        // Ensure that the object implements the requested interface type:
        Class c = type.getZClass();
        if (c == null || !c.isInstance(object)) {
            object = null;
        }
        return object;
    }

    /**
     * Queries the given UNO object for the given Java class (which must
     * represent a UNO interface type).
     *
     * @param  the requested UNO interface type.
     * @param zInterface a Java class representing a UNO interface type
     * @param object a reference to any Java object representing (a facet of) a
     * UNO object; may be null
     * @return a reference to the requested UNO interface type if available,
     * otherwise null
     * @see #queryInterface(Type, Object)
     */
    @SuppressWarnings("unchecked")
    public static  T queryInterface(Class zInterface, Object object) {
        return (T) queryInterface(new Type(zInterface), object);
    }

    /**
       Tests two UNO ANY values for equality.

       
Two UNO values are equal if and only if they are of the
       same UNO type t, and they meet the following condition,
       depending on t:

       
    
         
  • If t is a primitive type, then both values must denote
         the same element of the set of values of t.
    • 

         
  • If t is a structured type, then both values must
         recursively contain corresponding values that are equal.
    • 

         
  • If t is an interface type, then the two values must be
         either both null references, or both references to the same UNO
         object.
    • 
       


       @param any1 a Java value representing a UNO ANY value.

       @param any2 a Java value representing a UNO ANY value.

       @return true if and only if the two arguments represent
       equal UNO values.
    */
    public static boolean areSame(Object any1, Object any2) {
        Any a1 = Any.complete(any1);
        Any a2 = Any.complete(any2);
        Type t = a1.getType();
        if (!a2.getType().equals(t)) {
            return false;
        }
        Object v1 = a1.getObject();
        Object v2 = a2.getObject();
        switch (t.getTypeClass().getValue()) {
        case TypeClass.VOID_value:
            return true;
        case TypeClass.BOOLEAN_value:
        case TypeClass.BYTE_value:
        case TypeClass.SHORT_value:
        case TypeClass.UNSIGNED_SHORT_value:
        case TypeClass.LONG_value:
        case TypeClass.UNSIGNED_LONG_value:
        case TypeClass.HYPER_value:
        case TypeClass.UNSIGNED_HYPER_value:
        case TypeClass.FLOAT_value:
        case TypeClass.DOUBLE_value:
        case TypeClass.CHAR_value:
        case TypeClass.STRING_value:
        case TypeClass.TYPE_value:
            return v1.equals(v2);
        case TypeClass.SEQUENCE_value:
            int n = Array.getLength(v1);
            if (n != Array.getLength(v2)) {
                return false;
            }
            for (int i = 0; i < n; ++i) {
                // Recursively using areSame on Java values that are (boxed)
                // elements of Java arrays representing UNO sequence values,
                // instead of on Java values that are representations of UNO ANY
                // values, works by chance:
                if (!areSame(Array.get(v1, i), Array.get(v2, i))) {
                    return false;
                }
            }
            return true;
        case TypeClass.ENUM_value:
            return v1 == v2;
        case TypeClass.STRUCT_value:
        case TypeClass.EXCEPTION_value:
            FieldDescription[] fs;
            try {
                fs = TypeDescription.getTypeDescription(t).
                    getFieldDescriptions();
            } catch (ClassNotFoundException e) {
                throw new java.lang.RuntimeException(e);
            }
            for (int i = 0; i< fs.length; ++i) {
                Type ft = new Type(fs[i].getTypeDescription());
                try {
                    // Recursively using areSame on Java values that are (boxed)
                    // fields of Java classes representing UNO struct or
                    // exception values, instead of on Java values that are
                    // representations of UNO ANY values, works by chance:
                    if (!areSame(
                            completeValue(ft, fs[i].getField().get(v1)),
                            completeValue(ft, fs[i].getField().get(v2))))
                    {
                        return false;
                    }
                } catch (IllegalAccessException e) {
                    throw new java.lang.RuntimeException(e);
                }
            }
            return true;
        case TypeClass.INTERFACE_value:
            return v1 == v2
                || (v1 instanceof IQueryInterface
                    && ((IQueryInterface) v1).isSame(v2))
                || (v2 instanceof IQueryInterface
                    && ((IQueryInterface) v2).isSame(v1));
        default:
            throw new java.lang.RuntimeException(
                "com.sun.star.uno.Any has bad com.sun.star.uno.TypeClass");
        }
    }

    /**
       Complete a UNO value (make sure it is no invalid null
       value).

       
This is useful for members of parameterized type of instantiated
       polymorphic struct types, as null is a valid value there
       (and only there, for all types except ANY and interface
       types).


       @param type a non-void, non-exception UNO type.

       @param value a Java value representing a UNO value of the given UNO type,
       or null.

       @return the given value, or the neutral value of the given type, if the
       given value was an invalid null value.

       @since UDK 3.2.3
    */
    public static final Object completeValue(Type type, Object value) {
        if (value != null) {
            return value;
        }
        switch (type.getTypeClass().getValue()) {
        case TypeClass.BOOLEAN_value:
            return Boolean.FALSE;
        case TypeClass.BYTE_value:
            return Byte.valueOf((byte) 0);
        case TypeClass.SHORT_value:
        case TypeClass.UNSIGNED_SHORT_value:
            return Short.valueOf((short) 0);
        case TypeClass.LONG_value:
        case TypeClass.UNSIGNED_LONG_value:
            return Integer.valueOf(0);
        case TypeClass.HYPER_value:
        case TypeClass.UNSIGNED_HYPER_value:
            return Long.valueOf(0);
        case TypeClass.FLOAT_value:
            return Float.valueOf(0.0f);
        case TypeClass.DOUBLE_value:
            return Double.valueOf(0.0);
        case TypeClass.CHAR_value:
            return Character.valueOf('\u0000');
        case TypeClass.STRING_value:
            return "";
        case TypeClass.TYPE_value:
            return Type.VOID;
        case TypeClass.ANY_value:
        case TypeClass.INTERFACE_value:
            return null;
        case TypeClass.SEQUENCE_value:
            return Array.newInstance(type.getZClass().getComponentType(), 0);
        case TypeClass.STRUCT_value:
            try {
                return type.getZClass().getConstructor((Class[]) null).
                    newInstance((Object[]) null);
            } catch (java.lang.RuntimeException e) {
                throw e;
            } catch (java.lang.Exception e) {
                throw new java.lang.RuntimeException(e);
            }
        case TypeClass.ENUM_value:
            try {
                return type.getZClass().getMethod("getDefault", (Class[]) null).
                    invoke(null, (Object[]) null);
            } catch (java.lang.RuntimeException e) {
                throw e;
            } catch (java.lang.Exception e) {
                throw new java.lang.RuntimeException(e);
            }
        default:
            throw new IllegalArgumentException(
                "com.sun.star.uno.UnoRuntime.completeValue called with bad"
                + " com.sun.star.uno.Type");
        }
    }

    /**
     * Gets the current context of the current thread, or null if
     * no context has been set for the current thread.
     *
     * 
The current context is thread local, which means that this method
     * returns the context that was last set for this thread.

     *
     * @return the current context of the current thread, or null
     * if no context has been set for the current thread
     */
    public static XCurrentContext getCurrentContext() {
        return currentContext.get();
    }

    /**
     * Sets the current context for the current thread.
     *
     * 
The current context is thread local.  To support a stacking behaviour,
     * every function that sets the current context should reset it to the
     * original value when exiting (for example, within a finally
     * block).

     *
     * @param context the context to be set; if null, any
     * previously set context will be removed
    */
    public static void setCurrentContext(XCurrentContext context) {
        if (context == null) {
            currentContext.remove();
        } else {
            currentContext.set(context);
        }
    }

    /**
     * Retrieves an environment of type name with context
     * context.
     *
     * 
Environments are held weakly by this class.  If the requested
     * environment already exists, this methods simply returns it.  Otherwise,
     * this method looks for it under
     * com.sun.star.lib.uno.environments.name.name_environment.

     *
     * @param name the name of the environment
     * @param context the context of the environment
     * @throws Exception if something goes awry.
     * @return an environment.
     * @see com.sun.star.uno.IEnvironment
     *
     * @deprecated As of UDK 3.2.0, this method is deprecated, without
     * offering a replacement.
     */
    @Deprecated
    public static IEnvironment getEnvironment(String name, Object context)
        throws java.lang.Exception
    {
        synchronized (environments) {
            IEnvironment env = WeakMap.getValue(
                environments.get(name + context));
            if (env == null) {
                Class c = Class.forName(
                    "com.sun.star.lib.uno.environments." + name + "." + name
                    + "_environment");
                Constructor ctor = c.getConstructor(
                    new Class[] { Object.class });
                env = (IEnvironment) ctor.newInstance(new Object[] { context });
                environments.put(name + context, env);
            }
            return  env;
        }
    }

    /**
     * Gets a bridge from environment from to environment
     * to.
     *
     * 
Creates a new bridge, if the requested bridge does not yet exist, and
     * hands the arguments to the bridge.

     *
     * 
If the requested bridge does not exist, it is searched for in package
     * com.sun.star.lib.uno.bridges.from_to;
     * and the root classpath as
     * from_to_bridge.

     *
     * @param from the source environment
     * @param to the target environment
     * @param args the initial arguments for the bridge
     * @throws Exception if something goes awry.
     * @return the requested bridge
     * @see #getBridgeByName
     * @see com.sun.star.uno.IBridge
     * @see com.sun.star.uno.IEnvironment
     *
     * @deprecated As of UDK 3.2.0, this method is deprecated, without
     * offering a replacement.
     */
    @Deprecated
    public static IBridge getBridge(
        IEnvironment from, IEnvironment to, Object[] args)
        throws java.lang.Exception
    {
        synchronized (bridges) {
            String name = from.getName() + "_" + to.getName();
            String hashName = from.getName() + from.getContext() + "_"
                + to.getName() + to.getContext();
            IBridge bridge = WeakMap.getValue(bridges.get(hashName));
            if(bridge == null) {
                Class zClass = null;
                String className =  name + "_bridge";
                try {
                    zClass = Class.forName(className);
                } catch (ClassNotFoundException e) {
                    className = "com.sun.star.lib.uno.bridges." + name + "."
                        + className;
                    zClass = Class.forName(className);
                }
                Class[] signature = {
                    IEnvironment.class, IEnvironment.class, args.getClass() };
                Constructor constructor = zClass.getConstructor(signature);
                Object[] iargs = { from, to, args };
                bridge = (IBridge) constructor.newInstance(iargs);
                bridges.put(hashName, bridge);
            }
            return bridge;
        }
    }

    /**
     * Gets a bridge from environment from to environment
     * to.
     *
     * 
Creates a new bridge, if the requested bridge does not yet exist, and
     * hands the arguments to the bridge.

     *
     * 
If the requested bridge does not exist, it is searched for in package
     * com.sun.star.lib.uno.bridges.from_to;
     * and the root classpath as
     * from_to_bridge.  The used environments
     * are retrieved through getEnvironment.

     *
     * @param from the name of the source environment
     * @param fromContext the context for the source environment
     * @param to the name of the target environment
     * @param toContext the context for the target environment
     * @param args the initial arguments for the bridge
     * @throws Exception if something goes awry.
     * @return the requested bridge
     * @see #getBridge
     * @see #getEnvironment
     * @see com.sun.star.uno.IBridge
     * @see com.sun.star.uno.IEnvironment
     *
     * @deprecated As of UDK 3.2.0, this method is deprecated, without
     * offering a replacement.
     */
    @Deprecated
    public static IBridge getBridgeByName(
        String from, Object fromContext, String to, Object toContext,
        Object[] args) throws java.lang.Exception
    {
        return getBridge(
            getEnvironment(from, fromContext), getEnvironment(to, toContext),
            args);
    }

    /**
     * Returns an array of all active bridges.
     *
     * @return an array of IBridge objects
     * @see com.sun.star.uno.IBridge
     *
     * @deprecated As of UDK 3.2.0, this method is deprecated, without
     * offering a replacement.
     */
    @Deprecated
    public static IBridge[] getBridges() {
        ArrayList l = new ArrayList();
        synchronized (bridges) {
            for (Iterator> i = bridges.values().iterator(); i.hasNext();) {
                IBridge o = WeakMap.getValue(i.next());
                if (o != null) {
                    l.add(o);
                }
            }
        }
        return l.toArray(new IBridge[l.size()]);
    }

    /**
     * Gets a mapping from environment from to environment
     * to.
     *
     * 
Mappings are like bridges, except that with mappings one can only map
     * in one direction.  Mappings are here for compatibility with the binary
     * UNO API.  Mappings are implemented as wrappers around bridges.

     *
     * @param from the source environment
     * @param to the target environment
     * @throws Exception if something goes awry.
     * @return the requested mapping
     * @see com.sun.star.uno.IEnvironment
     * @see com.sun.star.uno.IMapping
     *
     * @deprecated As of UDK 3.2.0, this method is deprecated, without
     * offering a replacement.
     */
    @Deprecated
    public static IMapping getMapping(IEnvironment from, IEnvironment to)
        throws java.lang.Exception
    {
        IBridge bridge;
        try {
            bridge = getBridge(from, to, null);
        }
        catch (ClassNotFoundException e) {
            bridge = new BridgeTurner(getBridge(to, from, null));
        }
        return new MappingWrapper(bridge);
    }

    /**
     * Gets a mapping from environment from to environment
     * to.
     *
     * 
The used environments are retrieved through
     * getEnvironment.

     *
     * @param from the name of the source environment
     * @param to the name of the target environment
     * @throws Exception if something goes awry.
     * @return the requested mapping
     * @see #getEnvironment
     * @see #getMapping
     * @see com.sun.star.uno.IMapping
     *
     * @deprecated As of UDK 3.2.0, this method is deprecated, without
     * offering a replacement.
     */
    @Deprecated
    public static IMapping getMappingByName(String from, String to)
        throws java.lang.Exception
    {
        return getMapping(getEnvironment(from, null), getEnvironment(to, null));
    }

    /**
     * Resets this UnoRuntime to its initial state.
     *
     * 
Releases all references to bridges and environments.

     *
     * @return true if another thread didn't re-insert some bridge or
     *         environment before the method returns.  Why that information
     *         would be useful is anybody's guess.
     *
     * @deprecated As of UDK 3.2.0, this method is deprecated, without
     * offering a replacement.
     */
    @Deprecated
    public static boolean reset() {
        synchronized (bridges) {
            for (Iterator> i = bridges.values().iterator(); i.hasNext();) {
                IBridge b = WeakMap.getValue(i.next());
                if (b != null) {
                    // The following call to dispose was originally made to
                    // com.sun.star.lib.sandbox.Disposable.dispose, which cannot
                    // throw an InterruptedException or IOException:
                    try {
                        b.dispose();
                    } catch (InterruptedException e) {
                        Thread.currentThread();
                        Thread.interrupted();
                        throw new RuntimeException(
                            "Unexpected exception in UnoRuntime.reset: " + e);
                    } catch (IOException e) {
                        throw new RuntimeException(
                            "Unexpected exception in UnoRuntime.reset: " + e);
                    }
                }
            }
            bridges.clear();
        }
        environments.clear();
        return bridges.isEmpty() && environments.isEmpty();
    }

    /**
     * @deprecated As of UDK 3.2.0, do not use this internal field.
     */
    @Deprecated
    public static final boolean DEBUG = false;

    private static final class BridgeTurner implements IBridge {
        public BridgeTurner(IBridge bridge) {
            this.bridge = bridge;
        }

        public Object mapInterfaceTo(Object object, Type type) {
            return bridge.mapInterfaceFrom(object, type);
        }

        public Object mapInterfaceFrom(Object object, Type type) {
            return bridge.mapInterfaceTo(object, type);
        }

        public IEnvironment getSourceEnvironment() {
            return bridge.getTargetEnvironment();
        }

        public IEnvironment getTargetEnvironment() {
            return bridge.getSourceEnvironment();
        }

        public void acquire() {
            bridge.acquire();
        }

        public void release() {
            bridge.release();
        }

        public void dispose() throws InterruptedException, IOException {
            bridge.dispose();
        }

        private final IBridge bridge;
    }

    private static final class MappingWrapper implements IMapping {
        public MappingWrapper(IBridge bridge) {
            this.bridge = bridge;
        }

        public Object mapInterface(Object object, Type type) {
            return bridge.mapInterfaceTo(object, type);
        }

        private final IBridge bridge;
    }

    private static final WeakHashMap oidMap = new WeakHashMap();
    private static final String uniqueKeyHostPrefix
    = Integer.toString(new Object().hashCode(), 16) + ":";
    private static final Object uniqueKeyLock = new Object();
    private static long uniqueKeyTime = System.currentTimeMillis();
    private static long uniqueKeyCount = Long.MIN_VALUE;

    private static final String oidSuffix = ";java[];" + getUniqueKey();

    private static final ThreadLocal currentContext = new ThreadLocal();

    private static final WeakMap environments = new WeakMap();
    private static final WeakMap bridges = new WeakMap();
}
    

    

    

            

    

            



    
    






    
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