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author | Tom Tromey <tromey@redhat.com> | 2005-07-16 01:27:14 +0000 |
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committer | Tom Tromey <tromey@gcc.gnu.org> | 2005-07-16 01:27:14 +0000 |
commit | b0fa81eea9a270f23d6ad67ca7a6d25c18d20da1 (patch) | |
tree | 8762d1f992e2f725a6bde1ff966ed6f1e5f4f823 /libjava/java/beans/Introspector.java | |
parent | ea54b29342c8506acb4f858c68340c44b72e3532 (diff) | |
download | gcc-b0fa81eea9a270f23d6ad67ca7a6d25c18d20da1.zip gcc-b0fa81eea9a270f23d6ad67ca7a6d25c18d20da1.tar.gz gcc-b0fa81eea9a270f23d6ad67ca7a6d25c18d20da1.tar.bz2 |
Major merge with Classpath.
Removed many duplicate files.
* HACKING: Updated.x
* classpath: Imported new directory.
* standard.omit: New file.
* Makefile.in, aclocal.m4, configure: Rebuilt.
* sources.am: New file.
* configure.ac: Run Classpath configure script. Moved code around
to support. Disable xlib AWT peers (temporarily).
* Makefile.am (SUBDIRS): Added 'classpath'
(JAVAC): Removed.
(AM_CPPFLAGS): Added more -I options.
(BOOTCLASSPATH): Simplified.
Completely redid how sources are built.
Include sources.am.
* include/Makefile.am (tool_include__HEADERS): Removed jni.h.
* include/jni.h: Removed (in Classpath).
* scripts/classes.pl: Updated to look at built classes.
* scripts/makemake.tcl: New file.
* testsuite/libjava.jni/jni.exp (gcj_jni_compile_c_to_so): Added
-I options.
(gcj_jni_invocation_compile_c_to_binary): Likewise.
From-SVN: r102082
Diffstat (limited to 'libjava/java/beans/Introspector.java')
-rw-r--r-- | libjava/java/beans/Introspector.java | 608 |
1 files changed, 0 insertions, 608 deletions
diff --git a/libjava/java/beans/Introspector.java b/libjava/java/beans/Introspector.java deleted file mode 100644 index 02781b4..0000000 --- a/libjava/java/beans/Introspector.java +++ /dev/null @@ -1,608 +0,0 @@ -/* java.beans.Introspector - Copyright (C) 1998, 2002, 2003 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package java.beans; - -import gnu.java.beans.BeanInfoEmbryo; -import gnu.java.beans.ExplicitBeanInfo; -import gnu.java.beans.IntrospectionIncubator; -import gnu.java.lang.ClassHelper; - -import java.util.Hashtable; -import java.util.Vector; - -/** - * Introspector is the class that does the bulk of the - * design-time work in Java Beans. Every class must have - * a BeanInfo in order for an RAD tool to use it; but, as - * promised, you don't have to write the BeanInfo class - * yourself if you don't want to. All you have to do is - * call getBeanInfo() in the Introspector and it will use - * standard JavaBeans-defined method signatures to - * determine the information about your class.<P> - * - * Don't worry about it too much, though: you can provide - * JavaBeans with as much customized information as you - * want, or as little as you want, using the BeanInfo - * interface (see BeanInfo for details).<P> - * - * <STRONG>Order of Operations</STRONG><P> - * - * When you call getBeanInfo(class c), the Introspector - * first searches for BeanInfo class to see if you - * provided any explicit information. It searches for a - * class named <bean class name>BeanInfo in different - * packages, first searching the bean class's package - * and then moving on to search the beanInfoSearchPath.<P> - * - * If it does not find a BeanInfo class, it acts as though - * it had found a BeanInfo class returning null from all - * methods (meaning it should discover everything through - * Introspection). If it does, then it takes the - * information it finds in the BeanInfo class to be - * canonical (that is, the information speaks for its - * class as well as all superclasses).<P> - * - * When it has introspected the class, calls - * getBeanInfo(c.getSuperclass) and adds that information - * to the information it has, not adding to any information - * it already has that is canonical.<P> - * - * <STRONG>Introspection Design Patterns</STRONG><P> - * - * When the Introspector goes in to read the class, it - * follows a well-defined order in order to not leave any - * methods unaccounted for. Its job is to step over all - * of the public methods in a class and determine whether - * they are part of a property, an event, or a method (in - * that order). - * - * - * <STRONG>Properties:</STRONG><P> - * - * <OL> - * <LI>If there is a <CODE>public boolean isXXX()</CODE> - * method, then XXX is a read-only boolean property. - * <CODE>boolean getXXX()</CODE> may be supplied in - * addition to this method, although isXXX() is the - * one that will be used in this case and getXXX() - * will be ignored. If there is a - * <CODE>public void setXXX(boolean)</CODE> method, - * it is part of this group and makes it a read-write - * property.</LI> - * <LI>If there is a - * <CODE>public <type> getXXX(int)</CODE> - * method, then XXX is a read-only indexed property of - * type <type>. If there is a - * <CODE>public void setXXX(int,<type>)</CODE> - * method, then it is a read-write indexed property of - * type <type>. There may also be a - * <CODE>public <type>[] getXXX()</CODE> and a - * <CODE>public void setXXX(<type>)</CODE> - * method as well.</LI> - * <LI>If there is a - * <CODE>public void setXXX(int,<type>)</CODE> - * method, then it is a write-only indexed property of - * type <type>. There may also be a - * <CODE>public <type>[] getXXX()</CODE> and a - * <CODE>public void setXXX(<type>)</CODE> - * method as well.</LI> - * <LI>If there is a - * <CODE>public <type> getXXX()</CODE> method, - * then XXX is a read-only property of type - * <type>. If there is a - * <CODE>public void setXXX(<type>)</CODE> - * method, then it will be used for the property and - * the property will be considered read-write.</LI> - * <LI>If there is a - * <CODE>public void setXXX(<type>)</CODE> - * method, then as long as XXX is not already used as - * the name of a property, XXX is assumed to be a - * write-only property of type <type>.</LI> - * <LI>In all of the above cases, if the setXXX() method - * throws <CODE>PropertyVetoException</CODE>, then the - * property in question is assumed to be constrained. - * No properties are ever assumed to be bound - * (<STRONG>Spec Note:</STRONG> this is not in the - * spec, it just makes sense). See PropertyDescriptor - * for a description of bound and constrained - * properties.</LI> - * </OL> - * - * <STRONG>Events:</STRONG><P> - * - * If there is a pair of methods, - * <CODE>public void addXXX(<type>)</CODE> and - * <CODE>public void removeXXX(<type>)</CODE>, where - * <type> is a descendant of - * <CODE>java.util.EventListener</CODE>, then the pair of - * methods imply that this Bean will fire events to - * listeners of type <type>.<P> - * - * If the addXXX() method throws - * <CODE>java.util.TooManyListenersException</CODE>, then - * the event set is assumed to be <EM>unicast</EM>. See - * EventSetDescriptor for a discussion of unicast event - * sets.<P> - * - * <STRONG>Spec Note:</STRONG> the spec seems to say that - * the listener type's classname must be equal to the XXX - * part of addXXX() and removeXXX(), but that is not the - * case in Sun's implementation, so I am assuming it is - * not the case in general.<P> - * - * <STRONG>Methods:</STRONG><P> - * - * Any public methods (including those which were used - * for Properties or Events) are used as Methods. - * - * @author John Keiser - * @since JDK1.1 - * @see java.beans.BeanInfo - */ -public class Introspector { - - public static final int USE_ALL_BEANINFO = 1; - public static final int IGNORE_IMMEDIATE_BEANINFO = 2; - public static final int IGNORE_ALL_BEANINFO = 3; - - static String[] beanInfoSearchPath = {"gnu.java.beans.info"}; - static Hashtable beanInfoCache = new Hashtable(); - - private Introspector() {} - - /** - * Get the BeanInfo for class <CODE>beanClass</CODE>, - * first by looking for explicit information, next by - * using standard design patterns to determine - * information about the class. - * - * @param beanClass the class to get BeanInfo about. - * @return the BeanInfo object representing the class. - */ - public static BeanInfo getBeanInfo(Class beanClass) - throws IntrospectionException - { - BeanInfo cachedInfo; - synchronized(beanClass) - { - cachedInfo = (BeanInfo)beanInfoCache.get(beanClass); - if(cachedInfo != null) - { - return cachedInfo; - } - cachedInfo = getBeanInfo(beanClass,null); - beanInfoCache.put(beanClass,cachedInfo); - return cachedInfo; - } - } - - /** - * Flush all of the Introspector's internal caches. - * - * @since 1.2 - */ - public static void flushCaches() - { - beanInfoCache.clear(); - - // Clears all the intermediate ExplicitInfo instances which - // have been created. - // This makes sure we have to retrieve stuff like BeanDescriptors - // again. (Remember that FeatureDescriptor can be modified by the user.) - ExplicitInfo.flushCaches(); - } - - /** - * Flush the Introspector's internal cached information for a given - * class. - * - * @param clz the class to be flushed. - * @throws NullPointerException if clz is null. - * @since 1.2 - */ - public static void flushFromCaches(Class clz) - { - synchronized (clz) - { - beanInfoCache.remove(clz); - } - } - - /** - * Get the BeanInfo for class <CODE>beanClass</CODE>, - * first by looking for explicit information, next by - * using standard design patterns to determine - * information about the class. It crawls up the - * inheritance tree until it hits <CODE>topClass</CODE>. - * - * @param beanClass the Bean class. - * @param stopClass the class to stop at. - * @return the BeanInfo object representing the class. - */ - public static BeanInfo getBeanInfo(Class beanClass, Class stopClass) - throws IntrospectionException - { - ExplicitInfo explicit = new ExplicitInfo(beanClass, stopClass); - - IntrospectionIncubator ii = new IntrospectionIncubator(); - ii.setPropertyStopClass(explicit.propertyStopClass); - ii.setEventStopClass(explicit.eventStopClass); - ii.setMethodStopClass(explicit.methodStopClass); - ii.addMethods(beanClass.getMethods()); - - BeanInfoEmbryo currentInfo = ii.getBeanInfoEmbryo(); - PropertyDescriptor[] p = explicit.explicitPropertyDescriptors; - if(p!=null) - { - for(int i=0;i<p.length;i++) - { - if(!currentInfo.hasProperty(p[i])) - { - currentInfo.addProperty(p[i]); - } - } - if(explicit.defaultProperty != -1) - { - currentInfo.setDefaultPropertyName(p[explicit.defaultProperty].getName()); - } - } - EventSetDescriptor[] e = explicit.explicitEventSetDescriptors; - if(e!=null) - { - for(int i=0;i<e.length;i++) - { - if(!currentInfo.hasEvent(e[i])) - { - currentInfo.addEvent(e[i]); - } - } - if(explicit.defaultEvent != -1) - { - currentInfo.setDefaultEventName(e[explicit.defaultEvent].getName()); - } - } - MethodDescriptor[] m = explicit.explicitMethodDescriptors; - if(m!=null) - { - for(int i=0;i<m.length;i++) - { - if(!currentInfo.hasMethod(m[i])) - { - currentInfo.addMethod(m[i]); - } - } - } - - // Sets the info's BeanDescriptor to the one we extracted from the - // explicit BeanInfo instance(s) if they contained one. Otherwise we - // create the BeanDescriptor from scratch. - // Note: We do not create a copy the retrieved BeanDescriptor which will allow - // the user to modify the instance while it is cached. However this is how - // the RI does it. - currentInfo.setBeanDescriptor( - (explicit.explicitBeanDescriptor == null ? - new BeanDescriptor(beanClass, null) : - explicit.explicitBeanDescriptor)); - - currentInfo.setAdditionalBeanInfo(explicit.explicitBeanInfo); - currentInfo.setIcons(explicit.im); - - return currentInfo.getBeanInfo(); - } - - /** - * Get the search path for BeanInfo classes. - * - * @return the BeanInfo search path. - */ - public static String[] getBeanInfoSearchPath() - { - return beanInfoSearchPath; - } - - /** - * Set the search path for BeanInfo classes. - * @param beanInfoSearchPath the new BeanInfo search - * path. - */ - public static void setBeanInfoSearchPath(String[] beanInfoSearchPath) - { - Introspector.beanInfoSearchPath = beanInfoSearchPath; - } - - /** - * A helper method to convert a name to standard Java - * naming conventions: anything with two capitals as the - * first two letters remains the same, otherwise the - * first letter is decapitalized. URL = URL, I = i, - * MyMethod = myMethod. - * - * @param name the name to decapitalize. - * @return the decapitalized name. - */ - public static String decapitalize(String name) - { - try - { - if(!Character.isUpperCase(name.charAt(0))) - { - return name; - } - else - { - try - { - if(Character.isUpperCase(name.charAt(1))) - { - return name; - } - else - { - char[] c = name.toCharArray(); - c[0] = Character.toLowerCase(c[0]); - return new String(c); - } - } - catch(StringIndexOutOfBoundsException E) - { - char[] c = new char[1]; - c[0] = Character.toLowerCase(name.charAt(0)); - return new String(c); - } - } - } - catch(StringIndexOutOfBoundsException E) - { - return name; - } - catch(NullPointerException E) - { - return null; - } - } - - static BeanInfo copyBeanInfo(BeanInfo b) - { - java.awt.Image[] icons = new java.awt.Image[4]; - for(int i=1;i<=4;i++) - { - icons[i-1] = b.getIcon(i); - } - - return new ExplicitBeanInfo(b.getBeanDescriptor(), - b.getAdditionalBeanInfo(), - b.getPropertyDescriptors(), - b.getDefaultPropertyIndex(), - b.getEventSetDescriptors(), - b.getDefaultEventIndex(), - b.getMethodDescriptors(), - icons); - } -} - -class ExplicitInfo -{ - BeanDescriptor explicitBeanDescriptor; - BeanInfo[] explicitBeanInfo; - - PropertyDescriptor[] explicitPropertyDescriptors; - EventSetDescriptor[] explicitEventSetDescriptors; - MethodDescriptor[] explicitMethodDescriptors; - - int defaultProperty; - int defaultEvent; - - java.awt.Image[] im = new java.awt.Image[4]; - - Class propertyStopClass; - Class eventStopClass; - Class methodStopClass; - - static Hashtable explicitBeanInfos = new Hashtable(); - static Vector emptyBeanInfos = new Vector(); - - ExplicitInfo(Class beanClass, Class stopClass) - { - while(beanClass != null && !beanClass.equals(stopClass)) - { - - BeanInfo explicit = findExplicitBeanInfo(beanClass); - - - if(explicit != null) - { - - if(explicitBeanDescriptor == null) - { - explicitBeanDescriptor = explicit.getBeanDescriptor(); - } - - if(explicitBeanInfo == null) - { - explicitBeanInfo = explicit.getAdditionalBeanInfo(); - } - - if(explicitPropertyDescriptors == null) - { - if(explicit.getPropertyDescriptors() != null) - { - explicitPropertyDescriptors = explicit.getPropertyDescriptors(); - defaultProperty = explicit.getDefaultPropertyIndex(); - propertyStopClass = beanClass; - } - } - - if(explicitEventSetDescriptors == null) - { - if(explicit.getEventSetDescriptors() != null) - { - explicitEventSetDescriptors = explicit.getEventSetDescriptors(); - defaultEvent = explicit.getDefaultEventIndex(); - eventStopClass = beanClass; - } - } - - if(explicitMethodDescriptors == null) - { - if(explicit.getMethodDescriptors() != null) - { - explicitMethodDescriptors = explicit.getMethodDescriptors(); - methodStopClass = beanClass; - } - } - - if(im[0] == null && im[1] == null - && im[2] == null && im[3] == null) - { - im[0] = explicit.getIcon(0); - im[1] = explicit.getIcon(1); - im[2] = explicit.getIcon(2); - im[3] = explicit.getIcon(3); - } - } - beanClass = beanClass.getSuperclass(); - } - - if(propertyStopClass == null) - { - propertyStopClass = stopClass; - } - - if(eventStopClass == null) - { - eventStopClass = stopClass; - } - - if(methodStopClass == null) - { - methodStopClass = stopClass; - } - } - - /** Throws away all cached data and makes sure we re-instantiate things - * like BeanDescriptors again. - */ - static void flushCaches() { - explicitBeanInfos.clear(); - emptyBeanInfos.clear(); - } - - static BeanInfo findExplicitBeanInfo(Class beanClass) - { - BeanInfo retval = (BeanInfo)explicitBeanInfos.get(beanClass); - if(retval != null) - { - return retval; - } - else if(emptyBeanInfos.indexOf(beanClass) != -1) - { - return null; - } - else - { - retval = reallyFindExplicitBeanInfo(beanClass); - if(retval != null) - { - explicitBeanInfos.put(beanClass,retval); - } - else - { - emptyBeanInfos.addElement(beanClass); - } - return retval; - } - } - - static BeanInfo reallyFindExplicitBeanInfo(Class beanClass) - { - ClassLoader beanClassLoader = beanClass.getClassLoader(); - BeanInfo beanInfo; - - beanInfo = getBeanInfo(beanClassLoader, beanClass.getName() + "BeanInfo"); - if (beanInfo == null) - { - String newName; - newName = ClassHelper.getTruncatedClassName(beanClass) + "BeanInfo"; - - for(int i = 0; i < Introspector.beanInfoSearchPath.length; i++) - { - if (Introspector.beanInfoSearchPath[i].equals("")) - beanInfo = getBeanInfo(beanClassLoader, newName); - else - beanInfo = getBeanInfo(beanClassLoader, - Introspector.beanInfoSearchPath[i] + "." - + newName); - - // Returns the beanInfo if it exists and the described class matches - // the one we searched. - if (beanInfo != null && beanInfo.getBeanDescriptor() != null && - beanInfo.getBeanDescriptor().getBeanClass() == beanClass) - - return beanInfo; - } - } - - return beanInfo; - } - - /** - * Returns an instance of the given class name when it can be loaded - * through the given class loader, or null otherwise. - */ - private static BeanInfo getBeanInfo(ClassLoader cl, String infoName) - { - try - { - return (BeanInfo) Class.forName(infoName, true, cl).newInstance(); - } - catch (ClassNotFoundException cnfe) - { - return null; - } - catch (IllegalAccessException iae) - { - return null; - } - catch (InstantiationException ie) - { - return null; - } - } - -} |