| /* |
| * Copyright (c) 2000, 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| package javax.management.openmbean; |
| |
| |
| // java import |
| // |
| import java.lang.reflect.Array; |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import javax.management.Descriptor; |
| import javax.management.DescriptorRead; |
| import javax.management.ImmutableDescriptor; |
| import javax.management.MBeanAttributeInfo; |
| import com.sun.jmx.remote.util.EnvHelp; |
| |
| /** |
| * Describes an attribute of an open MBean. |
| * |
| * |
| * @since 1.5 |
| */ |
| public class OpenMBeanAttributeInfoSupport |
| extends MBeanAttributeInfo |
| implements OpenMBeanAttributeInfo { |
| |
| /* Serial version */ |
| static final long serialVersionUID = -4867215622149721849L; |
| |
| /** |
| * @serial The open mbean attribute's <i>open type</i> |
| */ |
| private OpenType<?> openType; |
| |
| /** |
| * @serial The open mbean attribute's default value |
| */ |
| private final Object defaultValue; |
| |
| /** |
| * @serial The open mbean attribute's legal values. This {@link |
| * Set} is unmodifiable |
| */ |
| private final Set<?> legalValues; // to be constructed unmodifiable |
| |
| /** |
| * @serial The open mbean attribute's min value |
| */ |
| private final Comparable<?> minValue; |
| |
| /** |
| * @serial The open mbean attribute's max value |
| */ |
| private final Comparable<?> maxValue; |
| |
| |
| // As this instance is immutable, these two values need only |
| // be calculated once. |
| private transient Integer myHashCode = null; |
| private transient String myToString = null; |
| |
| |
| /** |
| * Constructs an {@code OpenMBeanAttributeInfoSupport} instance, |
| * which describes the attribute of an open MBean with the |
| * specified {@code name}, {@code openType} and {@code |
| * description}, and the specified read/write access properties. |
| * |
| * @param name cannot be a null or empty string. |
| * |
| * @param description cannot be a null or empty string. |
| * |
| * @param openType cannot be null. |
| * |
| * @param isReadable {@code true} if the attribute has a getter |
| * exposed for management. |
| * |
| * @param isWritable {@code true} if the attribute has a setter |
| * exposed for management. |
| * |
| * @param isIs {@code true} if the attribute's getter is of the |
| * form <tt>is<i>XXX</i></tt>. |
| * |
| * @throws IllegalArgumentException if {@code name} or {@code |
| * description} are null or empty string, or {@code openType} is |
| * null. |
| */ |
| public OpenMBeanAttributeInfoSupport(String name, |
| String description, |
| OpenType<?> openType, |
| boolean isReadable, |
| boolean isWritable, |
| boolean isIs) { |
| this(name, description, openType, isReadable, isWritable, isIs, |
| (Descriptor) null); |
| } |
| |
| /** |
| * <p>Constructs an {@code OpenMBeanAttributeInfoSupport} instance, |
| * which describes the attribute of an open MBean with the |
| * specified {@code name}, {@code openType}, {@code |
| * description}, read/write access properties, and {@code Descriptor}.</p> |
| * |
| * <p>The {@code descriptor} can contain entries that will define |
| * the values returned by certain methods of this class, as |
| * explained in the {@link <a href="package-summary.html#constraints"> |
| * package description</a>}. |
| * |
| * @param name cannot be a null or empty string. |
| * |
| * @param description cannot be a null or empty string. |
| * |
| * @param openType cannot be null. |
| * |
| * @param isReadable {@code true} if the attribute has a getter |
| * exposed for management. |
| * |
| * @param isWritable {@code true} if the attribute has a setter |
| * exposed for management. |
| * |
| * @param isIs {@code true} if the attribute's getter is of the |
| * form <tt>is<i>XXX</i></tt>. |
| * |
| * @param descriptor The descriptor for the attribute. This may be null |
| * which is equivalent to an empty descriptor. |
| * |
| * @throws IllegalArgumentException if {@code name} or {@code |
| * description} are null or empty string, or {@code openType} is |
| * null, or the descriptor entries are invalid as described in the |
| * {@link <a href="package-summary.html#constraints">package |
| * description</a>}. |
| * |
| * @since 1.6 |
| */ |
| public OpenMBeanAttributeInfoSupport(String name, |
| String description, |
| OpenType<?> openType, |
| boolean isReadable, |
| boolean isWritable, |
| boolean isIs, |
| Descriptor descriptor) { |
| // Construct parent's state |
| // |
| super(name, |
| (openType==null) ? null : openType.getClassName(), |
| description, |
| isReadable, |
| isWritable, |
| isIs, |
| ImmutableDescriptor.union(descriptor, (openType==null)?null: |
| openType.getDescriptor())); |
| |
| // Initialize this instance's specific state |
| // |
| this.openType = openType; |
| |
| descriptor = getDescriptor(); // replace null by empty |
| this.defaultValue = valueFrom(descriptor, "defaultValue", openType); |
| this.legalValues = valuesFrom(descriptor, "legalValues", openType); |
| this.minValue = comparableValueFrom(descriptor, "minValue", openType); |
| this.maxValue = comparableValueFrom(descriptor, "maxValue", openType); |
| |
| try { |
| check(this); |
| } catch (OpenDataException e) { |
| throw new IllegalArgumentException(e.getMessage(), e); |
| } |
| } |
| |
| /** |
| * Constructs an {@code OpenMBeanAttributeInfoSupport} instance, |
| * which describes the attribute of an open MBean with the |
| * specified {@code name}, {@code openType}, {@code description} |
| * and {@code defaultValue}, and the specified read/write access |
| * properties. |
| * |
| * @param name cannot be a null or empty string. |
| * |
| * @param description cannot be a null or empty string. |
| * |
| * @param openType cannot be null. |
| * |
| * @param isReadable {@code true} if the attribute has a getter |
| * exposed for management. |
| * |
| * @param isWritable {@code true} if the attribute has a setter |
| * exposed for management. |
| * |
| * @param isIs {@code true} if the attribute's getter is of the |
| * form <tt>is<i>XXX</i></tt>. |
| * |
| * @param defaultValue must be a valid value for the {@code |
| * openType} specified for this attribute; default value not |
| * supported for {@code ArrayType} and {@code TabularType}; can |
| * be null, in which case it means that no default value is set. |
| * |
| * @param <T> allows the compiler to check that the {@code defaultValue}, |
| * if non-null, has the correct Java type for the given {@code openType}. |
| * |
| * @throws IllegalArgumentException if {@code name} or {@code |
| * description} are null or empty string, or {@code openType} is |
| * null. |
| * |
| * @throws OpenDataException if {@code defaultValue} is not a |
| * valid value for the specified {@code openType}, or {@code |
| * defaultValue} is non null and {@code openType} is an {@code |
| * ArrayType} or a {@code TabularType}. |
| */ |
| public <T> OpenMBeanAttributeInfoSupport(String name, |
| String description, |
| OpenType<T> openType, |
| boolean isReadable, |
| boolean isWritable, |
| boolean isIs, |
| T defaultValue) |
| throws OpenDataException { |
| this(name, description, openType, isReadable, isWritable, isIs, |
| defaultValue, (T[]) null); |
| } |
| |
| |
| /** |
| * <p>Constructs an {@code OpenMBeanAttributeInfoSupport} instance, |
| * which describes the attribute of an open MBean with the |
| * specified {@code name}, {@code openType}, {@code description}, |
| * {@code defaultValue} and {@code legalValues}, and the specified |
| * read/write access properties.</p> |
| * |
| * <p>The contents of {@code legalValues} are copied, so subsequent |
| * modifications of the array referenced by {@code legalValues} |
| * have no impact on this {@code OpenMBeanAttributeInfoSupport} |
| * instance.</p> |
| * |
| * @param name cannot be a null or empty string. |
| * |
| * @param description cannot be a null or empty string. |
| * |
| * @param openType cannot be null. |
| * |
| * @param isReadable {@code true} if the attribute has a getter |
| * exposed for management. |
| * |
| * @param isWritable {@code true} if the attribute has a setter |
| * exposed for management. |
| * |
| * @param isIs {@code true} if the attribute's getter is of the |
| * form <tt>is<i>XXX</i></tt>. |
| * |
| * @param defaultValue must be a valid value |
| * for the {@code |
| * openType} specified for this attribute; default value not |
| * supported for {@code ArrayType} and {@code TabularType}; can |
| * be null, in which case it means that no default value is set. |
| * |
| * @param legalValues each contained value must be valid for the |
| * {@code openType} specified for this attribute; legal values |
| * not supported for {@code ArrayType} and {@code TabularType}; |
| * can be null or empty. |
| * |
| * @param <T> allows the compiler to check that the {@code |
| * defaultValue} and {@code legalValues}, if non-null, have the |
| * correct Java type for the given {@code openType}. |
| * |
| * @throws IllegalArgumentException if {@code name} or {@code |
| * description} are null or empty string, or {@code openType} is |
| * null. |
| * |
| * @throws OpenDataException if {@code defaultValue} is not a |
| * valid value for the specified {@code openType}, or one value in |
| * {@code legalValues} is not valid for the specified {@code |
| * openType}, or {@code defaultValue} is non null and {@code |
| * openType} is an {@code ArrayType} or a {@code TabularType}, or |
| * {@code legalValues} is non null and non empty and {@code |
| * openType} is an {@code ArrayType} or a {@code TabularType}, or |
| * {@code legalValues} is non null and non empty and {@code |
| * defaultValue} is not contained in {@code legalValues}. |
| */ |
| public <T> OpenMBeanAttributeInfoSupport(String name, |
| String description, |
| OpenType<T> openType, |
| boolean isReadable, |
| boolean isWritable, |
| boolean isIs, |
| T defaultValue, |
| T[] legalValues) |
| throws OpenDataException { |
| this(name, description, openType, isReadable, isWritable, isIs, |
| defaultValue, legalValues, null, null); |
| } |
| |
| |
| /** |
| * Constructs an {@code OpenMBeanAttributeInfoSupport} instance, |
| * which describes the attribute of an open MBean, with the |
| * specified {@code name}, {@code openType}, {@code description}, |
| * {@code defaultValue}, {@code minValue} and {@code maxValue}. |
| * |
| * It is possible to specify minimal and maximal values only for |
| * an open type whose values are {@code Comparable}. |
| * |
| * @param name cannot be a null or empty string. |
| * |
| * @param description cannot be a null or empty string. |
| * |
| * @param openType cannot be null. |
| * |
| * @param isReadable {@code true} if the attribute has a getter |
| * exposed for management. |
| * |
| * @param isWritable {@code true} if the attribute has a setter |
| * exposed for management. |
| * |
| * @param isIs {@code true} if the attribute's getter is of the |
| * form <tt>is<i>XXX</i></tt>. |
| * |
| * @param defaultValue must be a valid value for the {@code |
| * openType} specified for this attribute; default value not |
| * supported for {@code ArrayType} and {@code TabularType}; can be |
| * null, in which case it means that no default value is set. |
| * |
| * @param minValue must be valid for the {@code openType} |
| * specified for this attribute; can be null, in which case it |
| * means that no minimal value is set. |
| * |
| * @param maxValue must be valid for the {@code openType} |
| * specified for this attribute; can be null, in which case it |
| * means that no maximal value is set. |
| * |
| * @param <T> allows the compiler to check that the {@code |
| * defaultValue}, {@code minValue}, and {@code maxValue}, if |
| * non-null, have the correct Java type for the given {@code |
| * openType}. |
| * |
| * @throws IllegalArgumentException if {@code name} or {@code |
| * description} are null or empty string, or {@code openType} is |
| * null. |
| * |
| * @throws OpenDataException if {@code defaultValue}, {@code |
| * minValue} or {@code maxValue} is not a valid value for the |
| * specified {@code openType}, or {@code defaultValue} is non null |
| * and {@code openType} is an {@code ArrayType} or a {@code |
| * TabularType}, or both {@code minValue} and {@code maxValue} are |
| * non-null and {@code minValue.compareTo(maxValue) > 0} is {@code |
| * true}, or both {@code defaultValue} and {@code minValue} are |
| * non-null and {@code minValue.compareTo(defaultValue) > 0} is |
| * {@code true}, or both {@code defaultValue} and {@code maxValue} |
| * are non-null and {@code defaultValue.compareTo(maxValue) > 0} |
| * is {@code true}. |
| */ |
| public <T> OpenMBeanAttributeInfoSupport(String name, |
| String description, |
| OpenType<T> openType, |
| boolean isReadable, |
| boolean isWritable, |
| boolean isIs, |
| T defaultValue, |
| Comparable<T> minValue, |
| Comparable<T> maxValue) |
| throws OpenDataException { |
| this(name, description, openType, isReadable, isWritable, isIs, |
| defaultValue, null, minValue, maxValue); |
| } |
| |
| private <T> OpenMBeanAttributeInfoSupport(String name, |
| String description, |
| OpenType<T> openType, |
| boolean isReadable, |
| boolean isWritable, |
| boolean isIs, |
| T defaultValue, |
| T[] legalValues, |
| Comparable<T> minValue, |
| Comparable<T> maxValue) |
| throws OpenDataException { |
| super(name, |
| (openType==null) ? null : openType.getClassName(), |
| description, |
| isReadable, |
| isWritable, |
| isIs, |
| makeDescriptor(openType, |
| defaultValue, legalValues, minValue, maxValue)); |
| |
| this.openType = openType; |
| |
| Descriptor d = getDescriptor(); |
| this.defaultValue = defaultValue; |
| this.minValue = minValue; |
| this.maxValue = maxValue; |
| // We already converted the array into an unmodifiable Set |
| // in the descriptor. |
| this.legalValues = (Set<?>) d.getFieldValue("legalValues"); |
| |
| check(this); |
| } |
| |
| /** |
| * An object serialized in a version of the API before Descriptors were |
| * added to this class will have an empty or null Descriptor. |
| * For consistency with our |
| * behavior in this version, we must replace the object with one |
| * where the Descriptors reflect the same values of openType, defaultValue, |
| * etc. |
| **/ |
| private Object readResolve() { |
| if (getDescriptor().getFieldNames().length == 0) { |
| OpenType<Object> xopenType = cast(openType); |
| Set<Object> xlegalValues = cast(legalValues); |
| Comparable<Object> xminValue = cast(minValue); |
| Comparable<Object> xmaxValue = cast(maxValue); |
| return new OpenMBeanAttributeInfoSupport( |
| name, description, openType, |
| isReadable(), isWritable(), isIs(), |
| makeDescriptor(xopenType, defaultValue, xlegalValues, |
| xminValue, xmaxValue)); |
| } else |
| return this; |
| } |
| |
| static void check(OpenMBeanParameterInfo info) throws OpenDataException { |
| OpenType<?> openType = info.getOpenType(); |
| if (openType == null) |
| throw new IllegalArgumentException("OpenType cannot be null"); |
| |
| if (info.getName() == null || |
| info.getName().trim().equals("")) |
| throw new IllegalArgumentException("Name cannot be null or empty"); |
| |
| if (info.getDescription() == null || |
| info.getDescription().trim().equals("")) |
| throw new IllegalArgumentException("Description cannot be null or empty"); |
| |
| // Check and initialize defaultValue |
| // |
| if (info.hasDefaultValue()) { |
| // Default value not supported for ArrayType and TabularType |
| // Cast to Object because "OpenType<T> instanceof" is illegal |
| if (openType.isArray() || (Object)openType instanceof TabularType) { |
| throw new OpenDataException("Default value not supported " + |
| "for ArrayType and TabularType"); |
| } |
| // Check defaultValue's class |
| if (!openType.isValue(info.getDefaultValue())) { |
| final String msg = |
| "Argument defaultValue's class [\"" + |
| info.getDefaultValue().getClass().getName() + |
| "\"] does not match the one defined in openType[\"" + |
| openType.getClassName() +"\"]"; |
| throw new OpenDataException(msg); |
| } |
| } |
| |
| // Check that we don't have both legalValues and min or max |
| // |
| if (info.hasLegalValues() && |
| (info.hasMinValue() || info.hasMaxValue())) { |
| throw new OpenDataException("cannot have both legalValue and " + |
| "minValue or maxValue"); |
| } |
| |
| // Check minValue and maxValue |
| if (info.hasMinValue() && !openType.isValue(info.getMinValue())) { |
| final String msg = |
| "Type of minValue [" + info.getMinValue().getClass().getName() + |
| "] does not match OpenType [" + openType.getClassName() + "]"; |
| throw new OpenDataException(msg); |
| } |
| if (info.hasMaxValue() && !openType.isValue(info.getMaxValue())) { |
| final String msg = |
| "Type of maxValue [" + info.getMaxValue().getClass().getName() + |
| "] does not match OpenType [" + openType.getClassName() + "]"; |
| throw new OpenDataException(msg); |
| } |
| |
| // Check that defaultValue is a legal value |
| // |
| if (info.hasDefaultValue()) { |
| Object defaultValue = info.getDefaultValue(); |
| if (info.hasLegalValues() && |
| !info.getLegalValues().contains(defaultValue)) { |
| throw new OpenDataException("defaultValue is not contained " + |
| "in legalValues"); |
| } |
| |
| // Check that minValue <= defaultValue <= maxValue |
| // |
| if (info.hasMinValue()) { |
| if (compare(info.getMinValue(), defaultValue) > 0) { |
| throw new OpenDataException("minValue cannot be greater " + |
| "than defaultValue"); |
| } |
| } |
| if (info.hasMaxValue()) { |
| if (compare(info.getMaxValue(), defaultValue) < 0) { |
| throw new OpenDataException("maxValue cannot be less " + |
| "than defaultValue"); |
| } |
| } |
| } |
| |
| // Check legalValues |
| // |
| if (info.hasLegalValues()) { |
| // legalValues not supported for TabularType and arrays |
| if ((Object)openType instanceof TabularType || openType.isArray()) { |
| throw new OpenDataException("Legal values not supported " + |
| "for TabularType and arrays"); |
| } |
| // Check legalValues are valid with openType |
| for (Object v : info.getLegalValues()) { |
| if (!openType.isValue(v)) { |
| final String msg = |
| "Element of legalValues [" + v + |
| "] is not a valid value for the specified openType [" + |
| openType.toString() +"]"; |
| throw new OpenDataException(msg); |
| } |
| } |
| } |
| |
| |
| // Check that, if both specified, minValue <= maxValue |
| // |
| if (info.hasMinValue() && info.hasMaxValue()) { |
| if (compare(info.getMinValue(), info.getMaxValue()) > 0) { |
| throw new OpenDataException("minValue cannot be greater " + |
| "than maxValue"); |
| } |
| } |
| |
| } |
| |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| static int compare(Object x, Object y) { |
| return ((Comparable) x).compareTo(y); |
| } |
| |
| static <T> Descriptor makeDescriptor(OpenType<T> openType, |
| T defaultValue, |
| T[] legalValues, |
| Comparable<T> minValue, |
| Comparable<T> maxValue) { |
| Map<String, Object> map = new HashMap<String, Object>(); |
| if (defaultValue != null) |
| map.put("defaultValue", defaultValue); |
| if (legalValues != null) { |
| Set<T> set = new HashSet<T>(); |
| for (T v : legalValues) |
| set.add(v); |
| set = Collections.unmodifiableSet(set); |
| map.put("legalValues", set); |
| } |
| if (minValue != null) |
| map.put("minValue", minValue); |
| if (maxValue != null) |
| map.put("maxValue", maxValue); |
| if (map.isEmpty()) { |
| return openType.getDescriptor(); |
| } else { |
| map.put("openType", openType); |
| return new ImmutableDescriptor(map); |
| } |
| } |
| |
| static <T> Descriptor makeDescriptor(OpenType<T> openType, |
| T defaultValue, |
| Set<T> legalValues, |
| Comparable<T> minValue, |
| Comparable<T> maxValue) { |
| T[] legals; |
| if (legalValues == null) |
| legals = null; |
| else { |
| legals = cast(new Object[legalValues.size()]); |
| legalValues.toArray(legals); |
| } |
| return makeDescriptor(openType, defaultValue, legals, minValue, maxValue); |
| } |
| |
| |
| static <T> T valueFrom(Descriptor d, String name, OpenType<T> openType) { |
| Object x = d.getFieldValue(name); |
| if (x == null) |
| return null; |
| try { |
| return convertFrom(x, openType); |
| } catch (Exception e) { |
| final String msg = |
| "Cannot convert descriptor field " + name + " to " + |
| openType.getTypeName(); |
| throw EnvHelp.initCause(new IllegalArgumentException(msg), e); |
| } |
| } |
| |
| static <T> Set<T> valuesFrom(Descriptor d, String name, |
| OpenType<T> openType) { |
| Object x = d.getFieldValue(name); |
| if (x == null) |
| return null; |
| Collection<?> coll; |
| if (x instanceof Set<?>) { |
| Set<?> set = (Set<?>) x; |
| boolean asis = true; |
| for (Object element : set) { |
| if (!openType.isValue(element)) { |
| asis = false; |
| break; |
| } |
| } |
| if (asis) |
| return cast(set); |
| coll = set; |
| } else if (x instanceof Object[]) { |
| coll = Arrays.asList((Object[]) x); |
| } else { |
| final String msg = |
| "Descriptor value for " + name + " must be a Set or " + |
| "an array: " + x.getClass().getName(); |
| throw new IllegalArgumentException(msg); |
| } |
| |
| Set<T> result = new HashSet<T>(); |
| for (Object element : coll) |
| result.add(convertFrom(element, openType)); |
| return result; |
| } |
| |
| static <T> Comparable<?> comparableValueFrom(Descriptor d, String name, |
| OpenType<T> openType) { |
| T t = valueFrom(d, name, openType); |
| if (t == null || t instanceof Comparable<?>) |
| return (Comparable<?>) t; |
| final String msg = |
| "Descriptor field " + name + " with value " + t + |
| " is not Comparable"; |
| throw new IllegalArgumentException(msg); |
| } |
| |
| private static <T> T convertFrom(Object x, OpenType<T> openType) { |
| if (openType.isValue(x)) { |
| T t = OpenMBeanAttributeInfoSupport.<T>cast(x); |
| return t; |
| } |
| return convertFromStrings(x, openType); |
| } |
| |
| private static <T> T convertFromStrings(Object x, OpenType<T> openType) { |
| if (openType instanceof ArrayType<?>) |
| return convertFromStringArray(x, openType); |
| else if (x instanceof String) |
| return convertFromString((String) x, openType); |
| final String msg = |
| "Cannot convert value " + x + " of type " + |
| x.getClass().getName() + " to type " + openType.getTypeName(); |
| throw new IllegalArgumentException(msg); |
| } |
| |
| private static <T> T convertFromString(String s, OpenType<T> openType) { |
| Class<T> c; |
| try { |
| c = cast(Class.forName(openType.safeGetClassName())); |
| } catch (ClassNotFoundException e) { |
| throw new NoClassDefFoundError(e.toString()); // can't happen |
| } |
| |
| // Look for: public static T valueOf(String) |
| Method valueOf; |
| try { |
| valueOf = c.getMethod("valueOf", String.class); |
| if (!Modifier.isStatic(valueOf.getModifiers()) || |
| valueOf.getReturnType() != c) |
| valueOf = null; |
| } catch (NoSuchMethodException e) { |
| valueOf = null; |
| } |
| if (valueOf != null) { |
| try { |
| return c.cast(valueOf.invoke(null, s)); |
| } catch (Exception e) { |
| final String msg = |
| "Could not convert \"" + s + "\" using method: " + valueOf; |
| throw new IllegalArgumentException(msg, e); |
| } |
| } |
| |
| // Look for: public T(String) |
| Constructor<T> con; |
| try { |
| con = c.getConstructor(String.class); |
| } catch (NoSuchMethodException e) { |
| con = null; |
| } |
| if (con != null) { |
| try { |
| return con.newInstance(s); |
| } catch (Exception e) { |
| final String msg = |
| "Could not convert \"" + s + "\" using constructor: " + con; |
| throw new IllegalArgumentException(msg, e); |
| } |
| } |
| |
| throw new IllegalArgumentException("Don't know how to convert " + |
| "string to " + |
| openType.getTypeName()); |
| } |
| |
| |
| /* A Descriptor contained an array value encoded as Strings. The |
| Strings must be organized in an array corresponding to the desired |
| array. If the desired array has n dimensions, so must the String |
| array. We will convert element by element from String to desired |
| component type. */ |
| private static <T> T convertFromStringArray(Object x, |
| OpenType<T> openType) { |
| ArrayType<?> arrayType = (ArrayType<?>) openType; |
| OpenType<?> baseType = arrayType.getElementOpenType(); |
| int dim = arrayType.getDimension(); |
| String squareBrackets = "["; |
| for (int i = 1; i < dim; i++) |
| squareBrackets += "["; |
| Class<?> stringArrayClass; |
| Class<?> targetArrayClass; |
| try { |
| stringArrayClass = |
| Class.forName(squareBrackets + "Ljava.lang.String;"); |
| targetArrayClass = |
| Class.forName(squareBrackets + "L" + baseType.safeGetClassName() + |
| ";"); |
| } catch (ClassNotFoundException e) { |
| throw new NoClassDefFoundError(e.toString()); // can't happen |
| } |
| if (!stringArrayClass.isInstance(x)) { |
| final String msg = |
| "Value for " + dim + "-dimensional array of " + |
| baseType.getTypeName() + " must be same type or a String " + |
| "array with same dimensions"; |
| throw new IllegalArgumentException(msg); |
| } |
| OpenType<?> componentOpenType; |
| if (dim == 1) |
| componentOpenType = baseType; |
| else { |
| try { |
| componentOpenType = new ArrayType<T>(dim - 1, baseType); |
| } catch (OpenDataException e) { |
| throw new IllegalArgumentException(e.getMessage(), e); |
| // can't happen |
| } |
| } |
| int n = Array.getLength(x); |
| Object[] targetArray = (Object[]) |
| Array.newInstance(targetArrayClass.getComponentType(), n); |
| for (int i = 0; i < n; i++) { |
| Object stringish = Array.get(x, i); // String or String[] etc |
| Object converted = |
| convertFromStrings(stringish, componentOpenType); |
| Array.set(targetArray, i, converted); |
| } |
| return OpenMBeanAttributeInfoSupport.<T>cast(targetArray); |
| } |
| |
| @SuppressWarnings("unchecked") |
| static <T> T cast(Object x) { |
| return (T) x; |
| } |
| |
| /** |
| * Returns the open type for the values of the attribute described |
| * by this {@code OpenMBeanAttributeInfoSupport} instance. |
| */ |
| public OpenType<?> getOpenType() { |
| return openType; |
| } |
| |
| /** |
| * Returns the default value for the attribute described by this |
| * {@code OpenMBeanAttributeInfoSupport} instance, if specified, |
| * or {@code null} otherwise. |
| */ |
| public Object getDefaultValue() { |
| |
| // Special case for ArrayType and TabularType |
| // [JF] TODO: clone it so that it cannot be altered, |
| // [JF] TODO: if we decide to support defaultValue as an array itself. |
| // [JF] As of today (oct 2000) it is not supported so |
| // defaultValue is null for arrays. Nothing to do. |
| |
| return defaultValue; |
| } |
| |
| /** |
| * Returns an unmodifiable Set of legal values for the attribute |
| * described by this {@code OpenMBeanAttributeInfoSupport} |
| * instance, if specified, or {@code null} otherwise. |
| */ |
| public Set<?> getLegalValues() { |
| |
| // Special case for ArrayType and TabularType |
| // [JF] TODO: clone values so that they cannot be altered, |
| // [JF] TODO: if we decide to support LegalValues as an array itself. |
| // [JF] As of today (oct 2000) it is not supported so |
| // legalValues is null for arrays. Nothing to do. |
| |
| // Returns our legalValues Set (set was constructed unmodifiable) |
| return (legalValues); |
| } |
| |
| /** |
| * Returns the minimal value for the attribute described by this |
| * {@code OpenMBeanAttributeInfoSupport} instance, if specified, |
| * or {@code null} otherwise. |
| */ |
| public Comparable<?> getMinValue() { |
| |
| // Note: only comparable values have a minValue, |
| // so that's not the case of arrays and tabulars (always null). |
| |
| return minValue; |
| } |
| |
| /** |
| * Returns the maximal value for the attribute described by this |
| * {@code OpenMBeanAttributeInfoSupport} instance, if specified, |
| * or {@code null} otherwise. |
| */ |
| public Comparable<?> getMaxValue() { |
| |
| // Note: only comparable values have a maxValue, |
| // so that's not the case of arrays and tabulars (always null). |
| |
| return maxValue; |
| } |
| |
| /** |
| * Returns {@code true} if this {@code |
| * OpenMBeanAttributeInfoSupport} instance specifies a non-null |
| * default value for the described attribute, {@code false} |
| * otherwise. |
| */ |
| public boolean hasDefaultValue() { |
| |
| return (defaultValue != null); |
| } |
| |
| /** |
| * Returns {@code true} if this {@code |
| * OpenMBeanAttributeInfoSupport} instance specifies a non-null |
| * set of legal values for the described attribute, {@code false} |
| * otherwise. |
| */ |
| public boolean hasLegalValues() { |
| |
| return (legalValues != null); |
| } |
| |
| /** |
| * Returns {@code true} if this {@code |
| * OpenMBeanAttributeInfoSupport} instance specifies a non-null |
| * minimal value for the described attribute, {@code false} |
| * otherwise. |
| */ |
| public boolean hasMinValue() { |
| |
| return (minValue != null); |
| } |
| |
| /** |
| * Returns {@code true} if this {@code |
| * OpenMBeanAttributeInfoSupport} instance specifies a non-null |
| * maximal value for the described attribute, {@code false} |
| * otherwise. |
| */ |
| public boolean hasMaxValue() { |
| |
| return (maxValue != null); |
| } |
| |
| |
| /** |
| * Tests whether {@code obj} is a valid value for the attribute |
| * described by this {@code OpenMBeanAttributeInfoSupport} |
| * instance. |
| * |
| * @param obj the object to be tested. |
| * |
| * @return {@code true} if {@code obj} is a valid value for |
| * the parameter described by this {@code |
| * OpenMBeanAttributeInfoSupport} instance, {@code false} |
| * otherwise. |
| */ |
| public boolean isValue(Object obj) { |
| return isValue(this, obj); |
| } |
| |
| @SuppressWarnings({"unchecked", "rawtypes"}) // cast to Comparable |
| static boolean isValue(OpenMBeanParameterInfo info, Object obj) { |
| if (info.hasDefaultValue() && obj == null) |
| return true; |
| return |
| info.getOpenType().isValue(obj) && |
| (!info.hasLegalValues() || info.getLegalValues().contains(obj)) && |
| (!info.hasMinValue() || |
| ((Comparable) info.getMinValue()).compareTo(obj) <= 0) && |
| (!info.hasMaxValue() || |
| ((Comparable) info.getMaxValue()).compareTo(obj) >= 0); |
| } |
| |
| /* *** Commodity methods from java.lang.Object *** */ |
| |
| |
| /** |
| * Compares the specified {@code obj} parameter with this {@code |
| * OpenMBeanAttributeInfoSupport} instance for equality. |
| * <p> |
| * Returns {@code true} if and only if all of the following statements are true: |
| * <ul> |
| * <li>{@code obj} is non null,</li> |
| * <li>{@code obj} also implements the {@code OpenMBeanAttributeInfo} interface,</li> |
| * <li>their names are equal</li> |
| * <li>their open types are equal</li> |
| * <li>their access properties (isReadable, isWritable and isIs) are equal</li> |
| * <li>their default, min, max and legal values are equal.</li> |
| * </ul> |
| * This ensures that this {@code equals} method works properly for |
| * {@code obj} parameters which are different implementations of |
| * the {@code OpenMBeanAttributeInfo} interface. |
| * |
| * <p>If {@code obj} also implements {@link DescriptorRead}, then its |
| * {@link DescriptorRead#getDescriptor() getDescriptor()} method must |
| * also return the same value as for this object.</p> |
| * |
| * @param obj the object to be compared for equality with this |
| * {@code OpenMBeanAttributeInfoSupport} instance. |
| * |
| * @return {@code true} if the specified object is equal to this |
| * {@code OpenMBeanAttributeInfoSupport} instance. |
| */ |
| public boolean equals(Object obj) { |
| if (!(obj instanceof OpenMBeanAttributeInfo)) |
| return false; |
| |
| OpenMBeanAttributeInfo other = (OpenMBeanAttributeInfo) obj; |
| |
| return |
| this.isReadable() == other.isReadable() && |
| this.isWritable() == other.isWritable() && |
| this.isIs() == other.isIs() && |
| equal(this, other); |
| } |
| |
| static boolean equal(OpenMBeanParameterInfo x1, OpenMBeanParameterInfo x2) { |
| if (x1 instanceof DescriptorRead) { |
| if (!(x2 instanceof DescriptorRead)) |
| return false; |
| Descriptor d1 = ((DescriptorRead) x1).getDescriptor(); |
| Descriptor d2 = ((DescriptorRead) x2).getDescriptor(); |
| if (!d1.equals(d2)) |
| return false; |
| } else if (x2 instanceof DescriptorRead) |
| return false; |
| |
| return |
| x1.getName().equals(x2.getName()) && |
| x1.getOpenType().equals(x2.getOpenType()) && |
| (x1.hasDefaultValue() ? |
| x1.getDefaultValue().equals(x2.getDefaultValue()) : |
| !x2.hasDefaultValue()) && |
| (x1.hasMinValue() ? |
| x1.getMinValue().equals(x2.getMinValue()) : |
| !x2.hasMinValue()) && |
| (x1.hasMaxValue() ? |
| x1.getMaxValue().equals(x2.getMaxValue()) : |
| !x2.hasMaxValue()) && |
| (x1.hasLegalValues() ? |
| x1.getLegalValues().equals(x2.getLegalValues()) : |
| !x2.hasLegalValues()); |
| } |
| |
| /** |
| * <p>Returns the hash code value for this {@code |
| * OpenMBeanAttributeInfoSupport} instance.</p> |
| * |
| * <p>The hash code of an {@code OpenMBeanAttributeInfoSupport} |
| * instance is the sum of the hash codes of all elements of |
| * information used in {@code equals} comparisons (ie: its name, |
| * its <i>open type</i>, its default, min, max and legal |
| * values, and its Descriptor). |
| * |
| * <p>This ensures that {@code t1.equals(t2)} implies that {@code |
| * t1.hashCode()==t2.hashCode()} for any two {@code |
| * OpenMBeanAttributeInfoSupport} instances {@code t1} and {@code |
| * t2}, as required by the general contract of the method {@link |
| * Object#hashCode() Object.hashCode()}. |
| * |
| * <p>However, note that another instance of a class implementing |
| * the {@code OpenMBeanAttributeInfo} interface may be equal to |
| * this {@code OpenMBeanAttributeInfoSupport} instance as defined |
| * by {@link #equals(java.lang.Object)}, but may have a different |
| * hash code if it is calculated differently. |
| * |
| * <p>As {@code OpenMBeanAttributeInfoSupport} instances are |
| * immutable, the hash code for this instance is calculated once, |
| * on the first call to {@code hashCode}, and then the same value |
| * is returned for subsequent calls. |
| * |
| * @return the hash code value for this {@code |
| * OpenMBeanAttributeInfoSupport} instance |
| */ |
| public int hashCode() { |
| |
| // Calculate the hash code value if it has not yet been done |
| // (ie 1st call to hashCode()) |
| // |
| if (myHashCode == null) |
| myHashCode = hashCode(this); |
| |
| // return always the same hash code for this instance (immutable) |
| // |
| return myHashCode.intValue(); |
| } |
| |
| static int hashCode(OpenMBeanParameterInfo info) { |
| int value = 0; |
| value += info.getName().hashCode(); |
| value += info.getOpenType().hashCode(); |
| if (info.hasDefaultValue()) |
| value += info.getDefaultValue().hashCode(); |
| if (info.hasMinValue()) |
| value += info.getMinValue().hashCode(); |
| if (info.hasMaxValue()) |
| value += info.getMaxValue().hashCode(); |
| if (info.hasLegalValues()) |
| value += info.getLegalValues().hashCode(); |
| if (info instanceof DescriptorRead) |
| value += ((DescriptorRead) info).getDescriptor().hashCode(); |
| return value; |
| } |
| |
| /** |
| * Returns a string representation of this |
| * {@code OpenMBeanAttributeInfoSupport} instance. |
| * <p> |
| * The string representation consists of the name of this class (i.e. |
| * {@code javax.management.openmbean.OpenMBeanAttributeInfoSupport}), |
| * the string representation of the name and open type of the |
| * described parameter, the string representation of its |
| * default, min, max and legal values and the string |
| * representation of its descriptor. |
| * |
| * <p>As {@code OpenMBeanAttributeInfoSupport} instances are |
| * immutable, the string representation for this instance is |
| * calculated once, on the first call to {@code toString}, and |
| * then the same value is returned for subsequent calls. |
| * |
| * @return a string representation of this |
| * {@code OpenMBeanAttributeInfoSupport} instance. |
| */ |
| public String toString() { |
| |
| // Calculate the string value if it has not yet been done |
| // (ie 1st call to toString()) |
| // |
| if (myToString == null) |
| myToString = toString(this); |
| |
| // return always the same string representation for this |
| // instance (immutable) |
| // |
| return myToString; |
| } |
| |
| static String toString(OpenMBeanParameterInfo info) { |
| Descriptor d = (info instanceof DescriptorRead) ? |
| ((DescriptorRead) info).getDescriptor() : null; |
| return |
| info.getClass().getName() + |
| "(name=" + info.getName() + |
| ",openType=" + info.getOpenType() + |
| ",default=" + info.getDefaultValue() + |
| ",minValue=" + info.getMinValue() + |
| ",maxValue=" + info.getMaxValue() + |
| ",legalValues=" + info.getLegalValues() + |
| ((d == null) ? "" : ",descriptor=" + d) + |
| ")"; |
| } |
| } |
