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Diffstat (limited to 'libjava/java/beans/IndexedPropertyDescriptor.java')
| -rw-r--r-- | libjava/java/beans/IndexedPropertyDescriptor.java | 296 |
1 files changed, 0 insertions, 296 deletions
diff --git a/libjava/java/beans/IndexedPropertyDescriptor.java b/libjava/java/beans/IndexedPropertyDescriptor.java deleted file mode 100644 index daf8441ec6b..00000000000 --- a/libjava/java/beans/IndexedPropertyDescriptor.java +++ /dev/null @@ -1,296 +0,0 @@ -/* java.beans.IndexedPropertyDescriptor - Copyright (C) 1998 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., 59 Temple Place, Suite 330, Boston, MA -02111-1307 USA. - -As a special exception, if you link this library with other files to -produce an executable, this library does not by itself cause the -resulting executable to be covered by the GNU General Public License. -This exception does not however invalidate any other reasons why the -executable file might be covered by the GNU General Public License. */ - - -package java.beans; - -import java.util.*; -import java.lang.reflect.*; - -/** - ** IndexedPropertyDescriptor describes information about a JavaBean - ** indexed property, by which we mean an array-like property that - ** has been exposed via a pair of get and set methods and another - ** pair that allows you to get to the property by an index.<P> - ** - ** An example property would have four methods like this:<P> - ** <CODE>FooBar[] getFoo()</CODE><BR> - ** <CODE>void setFoo(FooBar[])</CODE><BR> - ** <CODE>FooBar getFoo(int)</CODE><BR> - ** <CODE>void setFoo(int,FooBar)</CODE><P> - ** - ** The constraints put on get and set methods are:<P> - ** <OL> - ** <LI>There must be at least a get(int) or a set(int,...) method. - ** Nothing else is required. <B>Spec note:</B>One nice restriction - ** would be that if there is a get() there must be a get(int), same - ** with set, but that is not in the spec and is fairly harmless.)</LI> - ** <LI>A get array method must have signature - ** <CODE><propertyType>[] <getMethodName>()</CODE></LI> - ** <LI>A set array method must have signature - ** <CODE>void <setMethodName>(<propertyType>[])</CODE></LI> - ** <LI>A get index method must have signature - ** <CODE><propertyType> <getMethodName>(int)</CODE></LI> - ** <LI>A set index method must have signature - ** <CODE>void <setMethodName>(int,<propertyType>)</CODE></LI> - ** <LI>All these methods may throw any exception.</LI> - ** <LI>All these methods must be public.</LI> - ** </OL> - ** - ** @author John Keiser - ** @since JDK1.1 - ** @version 1.1.0, 26 Jul 1998 - **/ - -public class IndexedPropertyDescriptor extends PropertyDescriptor { - private Class indexedPropertyType; - private Method setIndex; - private Method getIndex; - - /** Create a new IndexedPropertyDescriptor by introspection. - ** This form of constructor creates the PropertyDescriptor by - ** looking for getter methods named <CODE>get<name>()</CODE> - ** and setter methods named - ** <CODE>set<name>()</CODE> in class - ** <CODE><beanClass></CODE>, where <name> has its - ** first letter capitalized by the constructor.<P> - ** - ** <B>Implementation note:</B> If there is a get(int) method, - ** then the return type of that method is used to find the - ** remaining methods. If there is no get method, then the - ** set(int) method is searched for exhaustively and that type - ** is used to find the others.<P> - ** - ** <B>Spec note:</B> - ** If there is no get(int) method and multiple set(int) methods with - ** the same name and the correct parameters (different type of course), - ** then an IntrospectionException is thrown. While Sun's spec - ** does not state this, it can make Bean behavior different on - ** different systems (since method order is not guaranteed) and as - ** such, can be treated as a bug in the spec. I am not aware of - ** whether Sun's implementation catches this. - ** - ** @param name the programmatic name of the property, usually - ** starting with a lowercase letter (e.g. fooManChu - ** instead of FooManChu). - ** @param beanClass the class the get and set methods live in. - ** @exception IntrospectionException if the methods are not found or invalid. - **/ - public IndexedPropertyDescriptor(String name, Class beanClass) throws IntrospectionException { - super(name); - String capitalized; - try { - capitalized = Character.toUpperCase(name.charAt(0)) + name.substring(1); - } catch(StringIndexOutOfBoundsException e) { - capitalized = ""; - } - findMethods(beanClass, "get" + capitalized, "set" + capitalized, "get" + capitalized, "set" + capitalized); - } - - /** Create a new IndexedPropertyDescriptor by introspection. - ** This form of constructor allows you to specify the - ** names of the get and set methods to search for.<P> - ** - ** <B>Implementation note:</B> If there is a get(int) method, - ** then the return type of that method is used to find the - ** remaining methods. If there is no get method, then the - ** set(int) method is searched for exhaustively and that type - ** is used to find the others.<P> - ** - ** <B>Spec note:</B> - ** If there is no get(int) method and multiple set(int) methods with - ** the same name and the correct parameters (different type of course), - ** then an IntrospectionException is thrown. While Sun's spec - ** does not state this, it can make Bean behavior different on - ** different systems (since method order is not guaranteed) and as - ** such, can be treated as a bug in the spec. I am not aware of - ** whether Sun's implementation catches this. - ** - ** @param name the programmatic name of the property, usually - ** starting with a lowercase letter (e.g. fooManChu - ** instead of FooManChu). - ** @param beanClass the class the get and set methods live in. - ** @param getMethodName the name of the get array method. - ** @param setMethodName the name of the set array method. - ** @param getIndexName the name of the get index method. - ** @param setIndexName the name of the set index method. - ** @exception IntrospectionException if the methods are not found or invalid. - **/ - public IndexedPropertyDescriptor(String name, Class beanClass, String getMethodName, String setMethodName, String getIndexName, String setIndexName) throws IntrospectionException { - super(name); - findMethods(beanClass, getMethodName, setMethodName, getIndexName, setIndexName); - } - - /** Create a new PropertyDescriptor using explicit Methods. - ** Note that the methods will be checked for conformance to standard - ** Property method rules, as described above at the top of this class. - ** - ** @param name the programmatic name of the property, usually - ** starting with a lowercase letter (e.g. fooManChu - ** instead of FooManChu). - ** @param getMethod the get array method. - ** @param setMethod the set array method. - ** @param getIndex the get index method. - ** @param setIndex the set index method. - ** @exception IntrospectionException if the methods are not found or invalid. - **/ - public IndexedPropertyDescriptor(String name, Method getMethod, Method setMethod, Method getIndex, Method setIndex) throws IntrospectionException { - super(name); - if(getMethod != null && getMethod.getParameterTypes().length > 0) { - throw new IntrospectionException("get method has parameters"); - } - if(getMethod != null && setMethod.getParameterTypes().length != 1) { - throw new IntrospectionException("set method does not have exactly one parameter"); - } - if(getMethod != null && setMethod != null) { - if(!getMethod.getReturnType().equals(setMethod.getParameterTypes()[0])) { - throw new IntrospectionException("set and get methods do not share the same type"); - } - if(!getMethod.getDeclaringClass().isAssignableFrom(setMethod.getDeclaringClass()) - && !setMethod.getDeclaringClass().isAssignableFrom(getMethod.getDeclaringClass())) { - throw new IntrospectionException("set and get methods are not in the same class."); - } - } - - if(getIndex != null && (getIndex.getParameterTypes().length != 1 - || !(getIndex.getParameterTypes()[0]).equals(java.lang.Integer.TYPE))) { - throw new IntrospectionException("get index method has wrong parameters"); - } - if(setIndex != null && (setIndex.getParameterTypes().length != 2 - || !(setIndex.getParameterTypes()[0]).equals(java.lang.Integer.TYPE))) { - throw new IntrospectionException("set index method has wrong parameters"); - } - if(getIndex != null && setIndex != null) { - if(!getIndex.getReturnType().equals(setIndex.getParameterTypes()[1])) { - throw new IntrospectionException("set index methods do not share the same type"); - } - if(!getIndex.getDeclaringClass().isAssignableFrom(setIndex.getDeclaringClass()) - && !setIndex.getDeclaringClass().isAssignableFrom(getIndex.getDeclaringClass())) { - throw new IntrospectionException("get and set index methods are not in the same class."); - } - } - - if(getIndex != null && getMethod != null && !getIndex.getDeclaringClass().isAssignableFrom(getMethod.getDeclaringClass()) - && !getMethod.getDeclaringClass().isAssignableFrom(getIndex.getDeclaringClass())) { - throw new IntrospectionException("methods are not in the same class."); - } - - if(getIndex != null && getMethod != null && !Array.newInstance(getIndex.getReturnType(),0).getClass().equals(getMethod.getReturnType())) { - throw new IntrospectionException("array methods do not match index methods."); - } - - this.getMethod = getMethod; - this.setMethod = setMethod; - this.getIndex = getIndex; - this.setIndex = getIndex; - this.indexedPropertyType = getIndex != null ? getIndex.getReturnType() : setIndex.getParameterTypes()[1]; - this.propertyType = getMethod != null ? getMethod.getReturnType() : (setMethod != null ? setMethod.getParameterTypes()[0] : Array.newInstance(this.indexedPropertyType,0).getClass()); - } - - public Class getIndexedPropertyType() { - return indexedPropertyType; - } - - public Method getIndexedReadMethod() { - return getIndex; - } - - public Method getIndexedWriteMethod() { - return setIndex; - } - - private void findMethods(Class beanClass, String getMethodName, String setMethodName, String getIndexName, String setIndexName) throws IntrospectionException { - try { - if(getIndexName != null) { - try { - Class[] getArgs = new Class[1]; - getArgs[0] = java.lang.Integer.TYPE; - getIndex = beanClass.getMethod(getIndexName,getArgs); - indexedPropertyType = getIndex.getReturnType(); - } catch(NoSuchMethodException E) { - } - } - if(getIndex != null) { - if(setIndexName != null) { - try { - Class[] setArgs = new Class[2]; - setArgs[0] = java.lang.Integer.TYPE; - setArgs[1] = indexedPropertyType; - setIndex = beanClass.getMethod(setIndexName,setArgs); - if(!setIndex.getReturnType().equals(java.lang.Void.TYPE)) { - throw new IntrospectionException(setIndexName + " has non-void return type"); - } - } catch(NoSuchMethodException E) { - } - } - } else if(setIndexName != null) { - Method[] m = beanClass.getMethods(); - for(int i=0;i<m.length;i++) { - Method current = m[i]; - if(current.getName().equals(setIndexName) - && current.getParameterTypes().length == 2 - && (current.getParameterTypes()[0]).equals(java.lang.Integer.TYPE) - && current.getReturnType().equals(java.lang.Void.TYPE)) { - if(setIndex != null) { - throw new IntrospectionException("Multiple, different set methods found that fit the bill!"); - } else { - setIndex = current; - indexedPropertyType = current.getParameterTypes()[1]; - } - } - } - if(setIndex == null) { - throw new IntrospectionException("Cannot find get or set methods."); - } - } else { - throw new IntrospectionException("Cannot find get or set methods."); - } - - Class arrayType = Array.newInstance(indexedPropertyType,0).getClass(); - - Class[] setArgs = new Class[1]; - setArgs[0] = arrayType; - try { - setMethod = beanClass.getMethod(setMethodName,setArgs); - if(!setMethod.getReturnType().equals(java.lang.Void.TYPE)) { - setMethod = null; - } - } catch(NoSuchMethodException E) { - } - - Class[] getArgs = new Class[0]; - try { - getMethod = beanClass.getMethod(getMethodName,getArgs); - if(!getMethod.getReturnType().equals(arrayType)) { - getMethod = null; - } - } catch(NoSuchMethodException E) { - } - } catch(SecurityException E) { - throw new IntrospectionException("SecurityException while trying to find methods."); - } - } -} |