diff -r 3b1ad397517c -r 59b772a18fac jdk/src/jdk.dev/share/classes/com/sun/tools/hat/resources/hat.js --- a/jdk/src/jdk.dev/share/classes/com/sun/tools/hat/resources/hat.js Tue May 19 20:04:29 2015 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1473 +0,0 @@ -/* - * Copyright (c) 2005, 2013, 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. - */ - -/* - * The Original Code is HAT. The Initial Developer of the - * Original Code is Bill Foote, with contributions from others - * at JavaSoft/Sun. - */ - -var hatPkg = Packages.com.sun.tools.hat.internal; - -/** - * This is JavaScript interface for heap analysis using HAT - * (Heap Analysis Tool). HAT classes are referred from - * this file. In particular, refer to classes in hat.model - * package. - * - * HAT model objects are wrapped as convenient script objects so that - * fields may be accessed in natural syntax. For eg. Java fields can be - * accessed with obj.field_name syntax and array elements can be accessed - * with array[index] syntax. - */ - -// returns an enumeration that wraps elements of -// the input enumeration elements. -function wrapperEnumeration(e) { - return new java.util.Enumeration() { - hasMoreElements: function() { - return e.hasMoreElements(); - }, - nextElement: function() { - return wrapJavaValue(e.nextElement()); - } - }; -} - -// returns an enumeration that filters out elements -// of input enumeration using the filter function. -function filterEnumeration(e, func, wrap) { - var next = undefined; - var index = 0; - - function findNext() { - var tmp; - while (e.hasMoreElements()) { - tmp = e.nextElement(); - index++; - if (wrap) { - tmp = wrapJavaValue(tmp); - } - if (func(tmp, index, e)) { - next = tmp; - return; - } - } - } - - return new java.util.Enumeration() { - hasMoreElements: function() { - findNext(); - return next != undefined; - }, - - nextElement: function() { - if (next == undefined) { - // user may not have called hasMoreElements? - findNext(); - } - if (next == undefined) { - throw "NoSuchElementException"; - } - var res = next; - next = undefined; - return res; - } - }; -} - -// enumeration that has no elements .. -var emptyEnumeration = new java.util.Enumeration() { - hasMoreElements: function() { - return false; - }, - nextElement: function() { - throw "NoSuchElementException"; - } - }; - -function wrapRoot(root) { - if (root) { - return { - id: root.idString, - description: root.description, - referrer: wrapJavaValue(root.referer), - type: root.typeName - }; - } else { - return null; - } -} - -function JavaClassProto() { - function jclass(obj) { - return obj['wrapped-object']; - } - - // return whether given class is subclass of this class or not - this.isSubclassOf = function(other) { - var tmp = jclass(this); - var otherid = objectid(other); - while (tmp != null) { - if (otherid.equals(tmp.idString)) { - return true; - } - tmp = tmp.superclass; - } - return false; - } - - // return whether given class is superclass of this class or not - this.isSuperclassOf = function(other) { - return other.isSubclassOf(this); - } - - // includes direct and indirect superclasses - this.superclasses = function() { - var res = new Array(); - var tmp = this.superclass; - while (tmp != null) { - res[res.length] = tmp; - tmp = tmp.superclass; - } - return res; - } - - /** - * Returns an array containing subclasses of this class. - * - * @param indirect should include indirect subclasses or not. - * default is true. - */ - this.subclasses = function(indirect) { - if (indirect == undefined) indirect = true; - var classes = jclass(this).subclasses; - var res = new Array(); - for (var i in classes) { - var subclass = wrapJavaValue(classes[i]); - res[res.length] = subclass; - if (indirect) { - res = res.concat(subclass.subclasses()); - } - } - return res; - } - this.toString = function() { return jclass(this).toString(); } -} - -var theJavaClassProto = new JavaClassProto(); - -// Script wrapper for HAT model objects, values. -// wraps a Java value as appropriate for script object -function wrapJavaValue(thing) { - if (thing == null || thing == undefined || - thing instanceof hatPkg.model.HackJavaValue) { - return null; - } - - if (thing instanceof hatPkg.model.JavaValue) { - // map primitive values to closest JavaScript primitives - if (thing instanceof hatPkg.model.JavaBoolean) { - return thing.toString() == "true"; - } else if (thing instanceof hatPkg.model.JavaChar) { - return thing.toString() + ''; - } else { - return java.lang.Double.parseDouble(thing.toString()); - } - } else { - // wrap Java object as script object - return wrapJavaObject(thing); - } -} - -// wrap Java object with appropriate script object -function wrapJavaObject(thing) { - - // HAT Java model object wrapper. Handles all cases - // (instance, object/primitive array and Class objects) - function javaObject(jobject) { - // FIXME: Do I need this? or can I assume that these would - // have been resolved already? - if (jobject instanceof hatPkg.model.JavaObjectRef) { - jobject = jobject.dereference(); - if (jobject instanceof hatPkg.model.HackJavaValue) { - print(jobject); - return null; - } - } - - if (jobject instanceof hatPkg.model.JavaObject) { - return new JavaObjectWrapper(jobject); - } else if (jobject instanceof hatPkg.model.JavaClass) { - return new JavaClassWrapper(jobject); - } else if (jobject instanceof hatPkg.model.JavaObjectArray) { - return new JavaObjectArrayWrapper(jobject); - } else if (jobject instanceof hatPkg.model.JavaValueArray) { - return new JavaValueArrayWrapper(jobject); - } else { - print("unknown heap object type: " + jobject.getClass()); - return jobject; - } - } - - // returns wrapper for Java instances - function JavaObjectWrapper(instance) { - var things = instance.fields; - var fields = instance.clazz.fieldsForInstance; - - // instance fields can be accessed in natural syntax - return new JSAdapter() { - __getIds__ : function() { - var res = new Array(fields.length); - for (var i in fields) { - res[i] = fields[i].name; - } - return res; - }, - __has__ : function(name) { - for (var i in fields) { - if (name == fields[i].name) return true; - } - return name == 'class' || name == 'toString' || - name == 'wrapped-object'; - }, - __get__ : function(name) { - - for (var i in fields) { - if(fields[i].name == name) { - return wrapJavaValue(things[i]); - } - } - - if (name == 'class') { - return wrapJavaValue(instance.clazz); - } else if (name == 'wrapped-object') { - return instance; - } - - return undefined; - }, - __call__: function(name) { - if (name == 'toString') { - return instance.toString(); - } else { - return undefined; - } - } - } - } - - - // return wrapper for Java Class objects - function JavaClassWrapper(jclass) { - var fields = jclass.statics; - - // to access static fields of given Class cl, use - // cl.statics. syntax - this.statics = new JSAdapter() { - __getIds__ : function() { - var res = new Array(fields.length); - for (var i in fields) { - res[i] = fields[i].field.name; - } - return res; - }, - __has__ : function(name) { - for (var i in fields) { - if (name == fields[i].field.name) { - return true; - } - } - return false; - }, - __get__ : function(name) { - for (var i in fields) { - if (name == fields[i].field.name) { - return wrapJavaValue(fields[i].value); - } - } - return undefined; - } - } - - if (jclass.superclass != null) { - this.superclass = wrapJavaValue(jclass.superclass); - } else { - this.superclass = null; - } - - this.loader = wrapJavaValue(jclass.getLoader()); - this.signers = wrapJavaValue(jclass.getSigners()); - this.protectionDomain = wrapJavaValue(jclass.getProtectionDomain()); - this.instanceSize = jclass.instanceSize; - this.name = jclass.name; - this.fields = jclass.fields; - this['wrapped-object'] = jclass; - } - - for (var i in theJavaClassProto) { - if (typeof theJavaClassProto[i] == 'function') { - JavaClassWrapper.prototype[i] = theJavaClassProto[i]; - } - } - - // returns wrapper for Java object arrays - function JavaObjectArrayWrapper(array) { - var elements = array.elements; - // array elements can be accessed in natural syntax - // also, 'length' property is supported. - return new JSAdapter() { - __getIds__ : function() { - var res = new Array(elements.length); - for (var i = 0; i < elements.length; i++) { - res[i] = String(i); - } - return res; - }, - __has__: function(name) { - return (name >= 0 && name < elements.length) || - name == 'length' || name == 'class' || - name == 'toString' || name == 'wrapped-object'; - }, - __get__ : function(name) { - if (name >= 0 && name < elements.length) { - return wrapJavaValue(elements[name]); - } else if (name == 'length') { - return elements.length; - } else if (name == 'class') { - return wrapJavaValue(array.clazz); - } else if (name == 'wrapped-object') { - return array; - } else { - return undefined; - } - }, - __call__: function(name) { - if (name == 'toString') { - return array.toString(); - } else { - return undefined; - } - } - } - } - - // returns wrapper for Java primitive arrays - function JavaValueArrayWrapper(array) { - var type = String(java.lang.Character.toString(array.elementType)); - var elements = array.elements; - // array elements can be accessed in natural syntax - // also, 'length' property is supported. - return new JSAdapter() { - __getIds__ : function() { - var r = new Array(array.length); - for (var i = 0; i < array.length; i++) { - r[i] = String(i); - } - return r; - }, - __has__: function(name) { - return (name >= 0 && name < array.length) || - name == 'length' || name == 'class' || - name == 'toString' || name == 'wrapped-object'; - }, - __get__: function(name) { - if (name >= 0 && name < array.length) { - return elements[name]; - } - - if (name == 'length') { - return array.length; - } else if (name == 'wrapped-object') { - return array; - } else if (name == 'class') { - return wrapJavaValue(array.clazz); - } else { - return undefined; - } - }, - __call__: function(name) { - if (name == 'toString') { - return array.valueString(true); - } else { - return undefined; - } - } - } - } - return javaObject(thing); -} - -// unwrap a script object to corresponding HAT object -function unwrapJavaObject(jobject) { - if (!(jobject instanceof hatPkg.model.JavaHeapObject)) { - try { - jobject = jobject["wrapped-object"]; - } catch (e) { - print("unwrapJavaObject: " + jobject + ", " + e); - jobject = undefined; - } - } - return jobject; -} - -/** - * readHeapDump parses a heap dump file and returns script wrapper object. - * - * @param file Heap dump file name - * @param stack flag to tell if allocation site traces are available - * @param refs flag to tell if backward references are needed or not - * @param debug debug level for HAT - * @return heap as a JavaScript object - */ -function readHeapDump(file, stack, refs, debug) { - - // default value of debug is 0 - if (!debug) debug = 0; - - // by default, we assume no stack traces - if (!stack) stack = false; - - // by default, backward references are resolved - if (!refs) refs = true; - - // read the heap dump - var heap = hatPkg.parser.HprofReader.readFile(file, stack, debug); - - // resolve it - heap.resolve(refs); - - // wrap Snapshot as convenient script object - return wrapHeapSnapshot(heap); -} - -/** - * The result object supports the following methods: - * - * forEachClass -- calls a callback for each Java Class - * forEachObject -- calls a callback for each Java object - * findClass -- finds Java Class of given name - * findObject -- finds object from given object id - * objects -- returns all objects of given class as an enumeration - * classes -- returns all classes in the heap as an enumeration - * reachables -- returns all objects reachable from a given object - * livepaths -- returns an array of live paths because of which an - * object alive. - * describeRef -- returns description for a reference from a 'from' - * object to a 'to' object. - */ -function wrapHeapSnapshot(heap) { - function getClazz(clazz) { - if (clazz == undefined) clazz = "java.lang.Object"; - var type = typeof(clazz); - if (type == "string") { - clazz = heap.findClass(clazz); - } else if (type == "object") { - clazz = unwrapJavaObject(clazz); - } else { - throw "class expected";; - } - return clazz; - } - - // return heap as a script object with useful methods. - return { - snapshot: heap, - - /** - * Class iteration: Calls callback function for each - * Java Class in the heap. Default callback function - * is 'print'. If callback returns true, the iteration - * is stopped. - * - * @param callback function to be called. - */ - forEachClass: function(callback) { - if (callback == undefined) callback = print; - var classes = this.snapshot.classes; - while (classes.hasMoreElements()) { - if (callback(wrapJavaValue(classes.nextElement()))) - return; - } - }, - - /** - * Returns an Enumeration of all roots. - */ - roots: function() { - var e = this.snapshot.roots; - return new java.util.Enumeration() { - hasMoreElements: function() { - return e.hasMoreElements(); - }, - nextElement: function() { - return wrapRoot(e.nextElement()); - } - }; - }, - - /** - * Returns an Enumeration for all Java classes. - */ - classes: function() { - return wrapIterator(this.snapshot.classes, true); - }, - - /** - * Object iteration: Calls callback function for each - * Java Object in the heap. Default callback function - * is 'print'.If callback returns true, the iteration - * is stopped. - * - * @param callback function to be called. - * @param clazz Class whose objects are retrieved. - * Optional, default is 'java.lang.Object' - * @param includeSubtypes flag to tell if objects of subtypes - * are included or not. optional, default is true. - */ - forEachObject: function(callback, clazz, includeSubtypes) { - if (includeSubtypes == undefined) includeSubtypes = true; - if (callback == undefined) callback = print; - clazz = getClazz(clazz); - - if (clazz) { - var instances = clazz.getInstances(includeSubtypes); - while (instances.hasNextElements()) { - if (callback(wrapJavaValue(instances.nextElement()))) - return; - } - } - }, - - /** - * Returns an enumeration of Java objects in the heap. - * - * @param clazz Class whose objects are retrieved. - * Optional, default is 'java.lang.Object' - * @param includeSubtypes flag to tell if objects of subtypes - * are included or not. optional, default is true. - * @param where (optional) filter expression or function to - * filter the objects. The expression has to return true - * to include object passed to it in the result array. - * Built-in variable 'it' refers to the current object in - * filter expression. - */ - objects: function(clazz, includeSubtypes, where) { - if (includeSubtypes == undefined) includeSubtypes = true; - if (where) { - if (typeof(where) == 'string') { - where = new Function("it", "return " + where); - } - } - clazz = getClazz(clazz); - if (clazz) { - var instances = clazz.getInstances(includeSubtypes); - if (where) { - return filterEnumeration(instances, where, true); - } else { - return wrapperEnumeration(instances); - } - } else { - return emptyEnumeration; - } - }, - - /** - * Find Java Class of given name. - * - * @param name class name - */ - findClass: function(name) { - var clazz = this.snapshot.findClass(name + ''); - return wrapJavaValue(clazz); - }, - - /** - * Find Java Object from given object id - * - * @param id object id as string - */ - findObject: function(id) { - return wrapJavaValue(this.snapshot.findThing(id)); - }, - - /** - * Returns an enumeration of objects in the finalizer - * queue waiting to be finalized. - */ - finalizables: function() { - var tmp = this.snapshot.getFinalizerObjects(); - return wrapperEnumeration(tmp); - }, - - /** - * Returns an array that contains objects referred from the - * given Java object directly or indirectly (i.e., all - * transitively referred objects are returned). - * - * @param jobject Java object whose reachables are returned. - */ - reachables: function (jobject) { - return reachables(jobject, this.snapshot.reachableExcludes); - }, - - /** - * Returns array of paths of references by which the given - * Java object is live. Each path itself is an array of - * objects in the chain of references. Each path supports - * toHtml method that returns html description of the path. - * - * @param jobject Java object whose live paths are returned - * @param weak flag to indicate whether to include paths with - * weak references or not. default is false. - */ - livepaths: function (jobject, weak) { - if (weak == undefined) { - weak = false; - } - - function wrapRefChain(refChain) { - var path = new Array(); - - // compute path array from refChain - var tmp = refChain; - while (tmp != null) { - var obj = tmp.obj; - path[path.length] = wrapJavaValue(obj); - tmp = tmp.next; - } - - function computeDescription(html) { - var root = refChain.obj.root; - var desc = root.description; - if (root.referer) { - var ref = root.referer; - desc += " (from " + - (html? toHtml(ref) : ref.toString()) + ')'; - } - desc += '->'; - var tmp = refChain; - while (tmp != null) { - var next = tmp.next; - var obj = tmp.obj; - desc += html? toHtml(obj) : obj.toString(); - if (next != null) { - desc += " (" + - obj.describeReferenceTo(next.obj, heap) + - ") ->"; - } - tmp = next; - } - return desc; - } - - return new JSAdapter() { - __getIds__ : function() { - var res = new Array(path.length); - for (var i = 0; i < path.length; i++) { - res[i] = String(i); - } - return res; - }, - __has__ : function (name) { - return (name >= 0 && name < path.length) || - name == 'length' || name == 'toHtml' || - name == 'toString'; - }, - __get__ : function(name) { - if (name >= 0 && name < path.length) { - return path[name]; - } else if (name == 'length') { - return path.length; - } else { - return undefined; - } - }, - __call__: function(name) { - if (name == 'toHtml') { - return computeDescription(true); - } else if (name == 'toString') { - return computeDescription(false); - } else { - return undefined; - } - } - }; - } - - jobject = unwrapJavaObject(jobject); - var refChains = this.snapshot.rootsetReferencesTo(jobject, weak); - var paths = new Array(refChains.length); - for (var i in refChains) { - paths[i] = wrapRefChain(refChains[i]); - } - return paths; - }, - - /** - * Return description string for reference from 'from' object - * to 'to' Java object. - * - * @param from source Java object - * @param to destination Java object - */ - describeRef: function (from, to) { - from = unwrapJavaObject(from); - to = unwrapJavaObject(to); - return from.describeReferenceTo(to, this.snapshot); - }, - }; -} - -// per-object functions - -/** - * Returns allocation site trace (if available) of a Java object - * - * @param jobject object whose allocation site trace is returned - */ -function allocTrace(jobject) { - try { - jobject = unwrapJavaObject(jobject); - var trace = jobject.allocatedFrom; - return (trace != null) ? trace.frames : null; - } catch (e) { - print("allocTrace: " + jobject + ", " + e); - return null; - } -} - -/** - * Returns Class object for given Java object - * - * @param jobject object whose Class object is returned - */ -function classof(jobject) { - jobject = unwrapJavaObject(jobject); - return wrapJavaValue(jobject.clazz); -} - -/** - * Find referers (a.k.a in-coming references). Calls callback - * for each referrer of the given Java object. If the callback - * returns true, the iteration is stopped. - * - * @param callback function to call for each referer - * @param jobject object whose referers are retrieved - */ -function forEachReferrer(callback, jobject) { - jobject = unwrapJavaObject(jobject); - var refs = jobject.referers; - while (refs.hasMoreElements()) { - if (callback(wrapJavaValue(refs.nextElement()))) { - return; - } - } -} - -/** - * Compares two Java objects for object identity. - * - * @param o1, o2 objects to compare for identity - */ -function identical(o1, o2) { - return objectid(o1) == objectid(o2); -} - -/** - * Returns Java object id as string - * - * @param jobject object whose id is returned - */ -function objectid(jobject) { - try { - jobject = unwrapJavaObject(jobject); - return String(jobject.idString); - } catch (e) { - print("objectid: " + jobject + ", " + e); - return null; - } -} - -/** - * Prints allocation site trace of given object - * - * @param jobject object whose allocation site trace is returned - */ -function printAllocTrace(jobject) { - var frames = this.allocTrace(jobject); - if (frames == null || frames.length == 0) { - print("allocation site trace unavailable for " + - objectid(jobject)); - return; - } - print(objectid(jobject) + " was allocated at .."); - for (var i in frames) { - var frame = frames[i]; - var src = frame.sourceFileName; - if (src == null) src = ''; - print('\t' + frame.className + "." + - frame.methodName + '(' + frame.methodSignature + ') [' + - src + ':' + frame.lineNumber + ']'); - } -} - -/** - * Returns an enumeration of referrers of the given Java object. - * - * @param jobject Java object whose referrers are returned. - */ -function referrers(jobject) { - try { - jobject = unwrapJavaObject(jobject); - return wrapperEnumeration(jobject.referers); - } catch (e) { - print("referrers: " + jobject + ", " + e); - return emptyEnumeration; - } -} - -/** - * Returns an array that contains objects referred from the - * given Java object. - * - * @param jobject Java object whose referees are returned. - */ -function referees(jobject) { - var res = new Array(); - jobject = unwrapJavaObject(jobject); - if (jobject != undefined) { - try { - jobject.visitReferencedObjects( - new hatPkg.model.JavaHeapObjectVisitor() { - visit: function(other) { - res[res.length] = wrapJavaValue(other); - }, - exclude: function(clazz, field) { - return false; - }, - mightExclude: function() { - return false; - } - }); - } catch (e) { - print("referees: " + jobject + ", " + e); - } - } - return res; -} - -/** - * Returns an array that contains objects referred from the - * given Java object directly or indirectly (i.e., all - * transitively referred objects are returned). - * - * @param jobject Java object whose reachables are returned. - * @param excludes optional comma separated list of fields to be - * removed in reachables computation. Fields are - * written as class_name.field_name form. - */ -function reachables(jobject, excludes) { - if (excludes == undefined) { - excludes = null; - } else if (typeof(excludes) == 'string') { - var st = new java.util.StringTokenizer(excludes, ","); - var excludedFields = new Array(); - while (st.hasMoreTokens()) { - excludedFields[excludedFields.length] = st.nextToken().trim(); - } - if (excludedFields.length > 0) { - excludes = new hatPkg.model.ReachableExcludes() { - isExcluded: function (field) { - for (var index in excludedFields) { - if (field.equals(excludedFields[index])) { - return true; - } - } - return false; - } - }; - } else { - // nothing to filter... - excludes = null; - } - } else if (! (excludes instanceof hatPkg.model.ReachableExcludes)) { - excludes = null; - } - - jobject = unwrapJavaObject(jobject); - var ro = new hatPkg.model.ReachableObjects(jobject, excludes); - var tmp = ro.reachables; - var res = new Array(tmp.length); - for (var i in tmp) { - res[i] = wrapJavaValue(tmp[i]); - } - return res; -} - - -/** - * Returns whether 'from' object refers to 'to' object or not. - * - * @param from Java object that is source of the reference. - * @param to Java object that is destination of the reference. - */ -function refers(from, to) { - try { - var tmp = unwrapJavaObject(from); - if (tmp instanceof hatPkg.model.JavaClass) { - from = from.statics; - } else if (tmp instanceof hatPkg.model.JavaValueArray) { - return false; - } - for (var i in from) { - if (identical(from[i], to)) { - return true; - } - } - } catch (e) { - print("refers: " + from + ", " + e); - } - return false; -} - -/** - * If rootset includes given jobject, return Root - * object explanining the reason why it is a root. - * - * @param jobject object whose Root is returned - */ -function root(jobject) { - try { - jobject = unwrapJavaObject(jobject); - return wrapRoot(jobject.root); - } catch (e) { - return null; - } -} - -/** - * Returns size of the given Java object - * - * @param jobject object whose size is returned - */ -function sizeof(jobject) { - try { - jobject = unwrapJavaObject(jobject); - return jobject.size; - } catch (e) { - print("sizeof: " + jobject + ", " + e); - return null; - } -} - -/** - * Returns String by replacing Unicode chars and - * HTML special chars (such as '<') with entities. - * - * @param str string to be encoded - */ -function encodeHtml(str) { - return hatPkg.util.Misc.encodeHtml(str); -} - -/** - * Returns HTML string for the given object. - * - * @param obj object for which HTML string is returned. - */ -function toHtml(obj) { - if (obj == null) { - return "null"; - } - - if (obj == undefined) { - return "undefined"; - } - - var tmp = unwrapJavaObject(obj); - if (tmp != undefined) { - var id = tmp.idString; - if (tmp instanceof Packages.com.sun.tools.hat.internal.model.JavaClass) { - var name = tmp.name; - return "class " + name + ""; - } else { - var name = tmp.clazz.name; - return "" + - name + "@" + id + ""; - } - } else if (obj instanceof Object) { - if (Array.isArray(obj)) { - // script array - var res = "[ "; - for (var i in obj) { - res += toHtml(obj[i]); - if (i != obj.length - 1) { - res += ", "; - } - } - res += " ]"; - return res; - } else { - // if the object has a toHtml function property - // just use that... - if (typeof(obj.toHtml) == 'function') { - return obj.toHtml(); - } else { - // script object - var res = "{ "; - for (var i in obj) { - res += i + ":" + toHtml(obj[i]) + ", "; - } - res += "}"; - return res; - } - } - } else { - // a Java object - obj = wrapIterator(obj); - // special case for enumeration - if (obj instanceof java.util.Enumeration) { - var res = "[ "; - while (obj.hasMoreElements()) { - res += toHtml(obj.nextElement()) + ", "; - } - res += "]"; - return res; - } else { - return obj; - } - } -} - -/* - * Generic array/iterator/enumeration [or even object!] manipulation - * functions. These functions accept an array/iteration/enumeration - * and expression String or function. These functions iterate each - * element of array and apply the expression/function on each element. - */ - -// private function to wrap an Iterator as an Enumeration -function wrapIterator(itr, wrap) { - if (itr instanceof java.util.Iterator) { - return new java.util.Enumeration() { - hasMoreElements: function() { - return itr.hasNext(); - }, - nextElement: function() { - return wrap? wrapJavaValue(itr.next()) : itr.next(); - } - }; - } else { - return itr; - } -} - -/** - * Converts an enumeration/iterator/object into an array - * - * @param obj enumeration/iterator/object - * @return array that contains values of enumeration/iterator/object - */ -function toArray(obj) { - obj = wrapIterator(obj); - if (obj instanceof java.util.Enumeration) { - var res = new Array(); - while (obj.hasMoreElements()) { - res[res.length] = obj.nextElement(); - } - return res; - } else if (obj instanceof Array) { - return obj; - } else { - var res = new Array(); - for (var index in obj) { - res[res.length] = obj[index]; - } - return res; - } -} - -/** - * Returns whether the given array/iterator/enumeration contains - * an element that satisfies the given boolean expression specified - * in code. - * - * @param array input array/iterator/enumeration that is iterated - * @param code expression string or function - * @return boolean result - * - * The code evaluated can refer to the following built-in variables. - * - * 'it' -> currently visited element - * 'index' -> index of the current element - * 'array' -> array that is being iterated - */ -function contains(array, code) { - array = wrapIterator(array); - var func = code; - if (typeof(func) != 'function') { - func = new Function("it", "index", "array", "return " + code); - } - - if (array instanceof java.util.Enumeration) { - var index = 0; - while (array.hasMoreElements()) { - var it = array.nextElement(); - if (func(it, index, array)) { - return true; - } - index++; - } - } else { - for (var index in array) { - var it = array[index]; - if (func(it, String(index), array)) { - return true; - } - } - } - return false; -} - -/** - * concatenates two arrays/iterators/enumerators. - * - * @param array1 array/iterator/enumeration - * @param array2 array/iterator/enumeration - * - * @return concatenated array or composite enumeration - */ -function concat(array1, array2) { - array1 = wrapIterator(array1); - array2 = wrapIterator(array2); - if (array1 instanceof Array && array2 instanceof Array) { - return array1.concat(array2); - } else if (array1 instanceof java.util.Enumeration && - array2 instanceof java.util.Enumeration) { - return new Packages.com.sun.tools.hat.internal.util.CompositeEnumeration(array1, array2); - } else { - return undefined; - } -} - -/** - * Returns the number of array/iterator/enumeration elements - * that satisfy the given boolean expression specified in code. - * The code evaluated can refer to the following built-in variables. - * - * @param array input array/iterator/enumeration that is iterated - * @param code expression string or function - * @return number of elements - * - * 'it' -> currently visited element - * 'index' -> index of the current element - * 'array' -> array that is being iterated - */ -function count(array, code) { - if (code == undefined) { - return length(array); - } - array = wrapIterator(array); - var func = code; - if (typeof(func) != 'function') { - func = new Function("it", "index", "array", "return " + code); - } - - var result = 0; - if (array instanceof java.util.Enumeration) { - var index = 0; - while (array.hasMoreElements()) { - var it = array.nextElement(); - if (func(it, index, array)) { - result++; - } - index++; - } - } else { - for (var index in array) { - var it = array[index]; - if (func(it, index, array)) { - result++; - } - } - } - return result; -} - -/** - * filter function returns an array/enumeration that contains - * elements of the input array/iterator/enumeration that satisfy - * the given boolean expression. The boolean expression code can - * refer to the following built-in variables. - * - * @param array input array/iterator/enumeration that is iterated - * @param code expression string or function - * @return array/enumeration that contains the filtered elements - * - * 'it' -> currently visited element - * 'index' -> index of the current element - * 'array' -> array that is being iterated - * 'result' -> result array - */ -function filter(array, code) { - array = wrapIterator(array); - var func = code; - if (typeof(code) != 'function') { - func = new Function("it", "index", "array", "result", "return " + code); - } - if (array instanceof java.util.Enumeration) { - return filterEnumeration(array, func, false); - } else { - var result = new Array(); - for (var index in array) { - var it = array[index]; - if (func(it, String(index), array, result)) { - result[result.length] = it; - } - } - return result; - } -} - -/** - * Returns the number of elements of array/iterator/enumeration. - * - * @param array input array/iterator/enumeration that is iterated - */ -function length(array) { - array = wrapIterator(array); - if (array instanceof Array) { - return array.length; - } else if (array instanceof java.util.Enumeration) { - var cnt = 0; - while (array.hasMoreElements()) { - array.nextElement(); - cnt++; - } - return cnt; - } else { - var cnt = 0; - for (var index in array) { - cnt++; - } - return cnt; - } -} - -/** - * Transforms the given object or array by evaluating given code - * on each element of the object or array. The code evaluated - * can refer to the following built-in variables. - * - * @param array input array/iterator/enumeration that is iterated - * @param code expression string or function - * @return array/enumeration that contains mapped values - * - * 'it' -> currently visited element - * 'index' -> index of the current element - * 'array' -> array that is being iterated - * 'result' -> result array - * - * map function returns an array/enumeration of values created - * by repeatedly calling code on each element of the input - * array/iterator/enumeration. - */ -function map(array, code) { - array = wrapIterator(array); - var func = code; - if(typeof(code) != 'function') { - func = new Function("it", "index", "array", "result", "return " + code); - } - - if (array instanceof java.util.Enumeration) { - var index = 0; - var result = new java.util.Enumeration() { - hasMoreElements: function() { - return array.hasMoreElements(); - }, - nextElement: function() { - return func(array.nextElement(), index++, array, result); - } - }; - return result; - } else { - var result = new Array(); - for (var index in array) { - var it = array[index]; - result[result.length] = func(it, String(index), array, result); - } - return result; - } -} - -// private function used by min, max functions -function minmax(array, code) { - if (typeof(code) == 'string') { - code = new Function("lhs", "rhs", "return " + code); - } - array = wrapIterator(array); - if (array instanceof java.util.Enumeration) { - if (! array.hasMoreElements()) { - return undefined; - } - var res = array.nextElement(); - while (array.hasMoreElements()) { - var next = array.nextElement(); - if (code(next, res)) { - res = next; - } - } - return res; - } else { - if (array.length == 0) { - return undefined; - } - var res = array[0]; - for (var index = 1; index < array.length; index++) { - if (code(array[index], res)) { - res = array[index]; - } - } - return res; - } -} - -/** - * Returns the maximum element of the array/iterator/enumeration - * - * @param array input array/iterator/enumeration that is iterated - * @param code (optional) comparision expression or function - * by default numerical maximum is computed. - */ -function max(array, code) { - if (code == undefined) { - code = function (lhs, rhs) { return lhs > rhs; } - } - return minmax(array, code); -} - -/** - * Returns the minimum element of the array/iterator/enumeration - * - * @param array input array/iterator/enumeration that is iterated - * @param code (optional) comparision expression or function - * by default numerical minimum is computed. - */ -function min(array, code) { - if (code == undefined) { - code = function (lhs, rhs) { return lhs < rhs; } - } - return minmax(array, code); -} - -/** - * sort function sorts the input array. optionally accepts - * code to compare the elements. If code is not supplied, - * numerical sort is done. - * - * @param array input array/iterator/enumeration that is sorted - * @param code expression string or function - * @return sorted array - * - * The comparison expression can refer to the following - * built-in variables: - * - * 'lhs' -> 'left side' element - * 'rhs' -> 'right side' element - */ -function sort(array, code) { - // we need an array to sort, so convert non-arrays - array = toArray(array); - - // by default use numerical comparison - var func = code; - if (code == undefined) { - func = function(lhs, rhs) { return lhs - rhs; }; - } else if (typeof(code) == 'string') { - func = new Function("lhs", "rhs", "return " + code); - } - return array.sort(func); -} - -/** - * Returns the sum of the elements of the array - * - * @param array input array that is summed. - * @param code optional expression used to map - * input elements before sum. - */ -function sum(array, code) { - array = wrapIterator(array); - if (code != undefined) { - array = map(array, code); - } - var result = 0; - if (array instanceof java.util.Enumeration) { - while (array.hasMoreElements()) { - result += Number(array.nextElement()); - } - } else { - for (var index in array) { - result += Number(array[index]); - } - } - return result; -} - -/** - * Returns array of unique elements from the given input - * array/iterator/enumeration. - * - * @param array from which unique elements are returned. - * @param code optional expression (or function) giving unique - * attribute/property for each element. - * by default, objectid is used for uniqueness. - */ -function unique(array, code) { - array = wrapIterator(array); - if (code == undefined) { - code = new Function("it", "return objectid(it);"); - } else if (typeof(code) == 'string') { - code = new Function("it", "return " + code); - } - var tmp = new Object(); - if (array instanceof java.util.Enumeration) { - while (array.hasMoreElements()) { - var it = array.nextElement(); - tmp[code(it)] = it; - } - } else { - for (var index in array) { - var it = array[index]; - tmp[code(it)] = it; - } - } - var res = new Array(); - for (var index in tmp) { - res[res.length] = tmp[index]; - } - return res; -}