--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/javax/management/openmbean/OpenMBeanAttributeInfoSupport.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,1120 @@
+/*
+ * Copyright 2000-2007 Sun Microsystems, Inc. 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. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.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")
+ 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.getClassName()));
+ } 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);
+ }
+ }
+
+ // 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);
+ }
+ }
+
+ 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.getClassName() +
+ ";");
+ } 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);
+ }
+ Class<?> targetComponentClass = targetArrayClass.getComponentType();
+ 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") // 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) +
+ ")";
+ }
+}