WIP: Moved dependencies to separate utility class. Later on we will move this class to separate module.
Project: http://git-wip-us.apache.org/repos/asf/ignite/repo Commit: http://git-wip-us.apache.org/repos/asf/ignite/commit/23e48072 Tree: http://git-wip-us.apache.org/repos/asf/ignite/tree/23e48072 Diff: http://git-wip-us.apache.org/repos/asf/ignite/diff/23e48072 Branch: refs/heads/ignite-3912 Commit: 23e48072dab4af81416c416a08f88050fe617d3a Parents: 437fb20 Author: vozerov-gridgain <voze...@gridgain.com> Authored: Fri Sep 16 12:04:28 2016 +0300 Committer: vozerov-gridgain <voze...@gridgain.com> Committed: Fri Sep 16 12:04:28 2016 +0300 ---------------------------------------------------------------------- .../processors/hadoop/HadoopClassLoader.java | 614 +------------------ .../hadoop/HadoopClassLoaderUtils.java | 614 +++++++++++++++++++ 2 files changed, 628 insertions(+), 600 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/ignite/blob/23e48072/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/HadoopClassLoader.java ---------------------------------------------------------------------- diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/HadoopClassLoader.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/HadoopClassLoader.java index d2be687..30a6e72 100644 --- a/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/HadoopClassLoader.java +++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/HadoopClassLoader.java @@ -17,38 +17,26 @@ package org.apache.ignite.internal.processors.hadoop; +import org.apache.ignite.IgniteCheckedException; +import org.apache.ignite.internal.util.ClassCache; +import org.apache.ignite.internal.util.typedef.F; +import org.apache.ignite.internal.util.typedef.internal.S; +import org.apache.ignite.internal.util.typedef.internal.U; +import org.jetbrains.annotations.Nullable; +import org.jsr166.ConcurrentHashMap8; + import java.io.IOException; import java.io.InputStream; import java.net.URL; import java.net.URLClassLoader; import java.util.ArrayList; import java.util.Collection; -import java.util.HashSet; import java.util.Map; -import java.util.Set; import java.util.UUID; import java.util.Vector; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.ConcurrentMap; -import org.apache.ignite.IgniteCheckedException; -import org.apache.ignite.internal.util.ClassCache; -import org.apache.ignite.internal.util.typedef.F; -import org.apache.ignite.internal.util.typedef.internal.S; -import org.apache.ignite.internal.util.typedef.internal.U; -import org.jetbrains.annotations.Nullable; -import org.jsr166.ConcurrentHashMap8; -import org.objectweb.asm.AnnotationVisitor; -import org.objectweb.asm.Attribute; -import org.objectweb.asm.ClassReader; -import org.objectweb.asm.ClassVisitor; -import org.objectweb.asm.FieldVisitor; -import org.objectweb.asm.Handle; -import org.objectweb.asm.Label; -import org.objectweb.asm.MethodVisitor; -import org.objectweb.asm.Opcodes; -import org.objectweb.asm.Type; - /** * Class loader allowing explicitly load classes without delegation to parent class loader. * Also supports class parsing for finding dependencies which contain transitive dependencies @@ -89,9 +77,6 @@ public class HadoopClassLoader extends URLClassLoader implements ClassCache { private static volatile Collection<URL> hadoopJars; /** */ - private static final Map<String, Boolean> cache = new ConcurrentHashMap8<>(); - - /** */ private static final Map<String, byte[]> bytesCache = new ConcurrentHashMap8<>(); /** Class cache. */ @@ -201,35 +186,11 @@ public class HadoopClassLoader extends URLClassLoader implements ClassCache { } } - /** - * Need to parse only Ignite Hadoop and IGFS classes. - * - * @param cls Class name. - * @return {@code true} if we need to check this class. - */ - private static boolean isHadoopIgfs(String cls) { - String ignitePkgPrefix = "org.apache.ignite"; - - int len = ignitePkgPrefix.length(); - - return cls.startsWith(ignitePkgPrefix) && ( - cls.indexOf("igfs.", len) != -1 || - cls.indexOf(".fs.", len) != -1 || - cls.indexOf("hadoop.", len) != -1); - } - - /** - * @param cls Class name. - * @return {@code true} If this is Hadoop class. - */ - private static boolean isHadoop(String cls) { - return cls.startsWith("org.apache.hadoop."); - } - /** {@inheritDoc} */ @Override protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException { try { - if (isHadoop(name)) { // Always load Hadoop classes explicitly, since Hadoop can be available in App classpath. + // Always load Hadoop classes explicitly, since Hadoop can be available in App classpath. + if (HadoopClassLoaderUtils.isHadoop(name)) { if (name.equals(CLS_SHUTDOWN_HOOK_MANAGER)) // Dirty hack to get rid of Hadoop shutdown hooks. return loadReplace(name, CLS_SHUTDOWN_HOOK_MANAGER_REPLACE); else if (name.equals(CLS_DAEMON)) @@ -240,7 +201,8 @@ public class HadoopClassLoader extends URLClassLoader implements ClassCache { return loadClassExplicitly(name, resolve); } - if (isHadoopIgfs(name)) { // For Ignite Hadoop and IGFS classes we have to check if they depend on Hadoop. + // For Ignite Hadoop and IGFS classes we have to check if they depend on Hadoop. + if (HadoopClassLoaderUtils.isHadoopIgfs(name)) { if (hasExternalDependencies(name)) return loadClassExplicitly(name, resolve); } @@ -270,7 +232,7 @@ public class HadoopClassLoader extends URLClassLoader implements ClassCache { byte[] bytes = bytesCache.get(originalName); if (bytes == null) { - InputStream in = loadClassBytes(getParent(), replaceName); + InputStream in = HadoopClassLoaderUtils.loadClassBytes(getParent(), replaceName); bytes = HadoopClassLoaderUtils.loadReplace(in, originalName, replaceName); @@ -324,119 +286,13 @@ public class HadoopClassLoader extends URLClassLoader implements ClassCache { } /** - * @param ldr Loader. - * @param clsName Class. - * @return Input stream. - */ - @Nullable private static InputStream loadClassBytes(ClassLoader ldr, String clsName) { - return ldr.getResourceAsStream(clsName.replace('.', '/') + ".class"); - } - - /** * Check whether class has external dependencies on Hadoop. * * @param clsName Class name. * @return {@code True} if class has external dependencies. */ boolean hasExternalDependencies(String clsName) { - Boolean hasDeps = cache.get(clsName); - - if (hasDeps == null) { - CollectingContext ctx = new CollectingContext(); - - ctx.annVisitor = new CollectingAnnotationVisitor(ctx); - ctx.mthdVisitor = new CollectingMethodVisitor(ctx, ctx.annVisitor); - ctx.fldVisitor = new CollectingFieldVisitor(ctx, ctx.annVisitor); - ctx.clsVisitor = new CollectingClassVisitor(ctx, ctx.annVisitor, ctx.mthdVisitor, ctx.fldVisitor); - - hasDeps = hasExternalDependencies(clsName, ctx); - - cache.put(clsName, hasDeps); - } - - return hasDeps; - } - - /** - * Check whether class has external dependencies on Hadoop. - * - * @param clsName Class name. - * @param ctx Context. - * @return {@code true} If the class has external dependencies. - */ - boolean hasExternalDependencies(String clsName, CollectingContext ctx) { - if (isHadoop(clsName)) // Hadoop must not be in classpath but Idea sucks, so filtering explicitly as external. - return true; - - // Try to get from parent to check if the type accessible. - InputStream in = loadClassBytes(getParent(), clsName); - - if (in == null) // The class is external itself, it must be loaded from this class loader. - return true; - - if (!isHadoopIgfs(clsName)) // Other classes should not have external dependencies. - return false; - - final ClassReader rdr; - - try { - rdr = new ClassReader(in); - } - catch (IOException e) { - throw new RuntimeException("Failed to read class: " + clsName, e); - } - - ctx.visited.add(clsName); - - rdr.accept(ctx.clsVisitor, 0); - - if (ctx.found) // We already know that we have dependencies, no need to check parent. - return true; - - // Here we are known to not have any dependencies but possibly we have a parent which has them. - int idx = clsName.lastIndexOf('$'); - - if (idx == -1) // No parent class. - return false; - - String parentCls = clsName.substring(0, idx); - - if (ctx.visited.contains(parentCls)) - return false; - - Boolean res = cache.get(parentCls); - - if (res == null) - res = hasExternalDependencies(parentCls, ctx); - - return res; - } - - /** - * @param name Class name. - * @return {@code true} If this is a valid class name. - */ - private static boolean validateClassName(String name) { - int len = name.length(); - - if (len <= 1) - return false; - - if (!Character.isJavaIdentifierStart(name.charAt(0))) - return false; - - boolean hasDot = false; - - for (int i = 1; i < len; i++) { - char c = name.charAt(i); - - if (c == '.') - hasDot = true; - else if (!Character.isJavaIdentifierPart(c)) - return false; - } - - return hasDot; + return HadoopClassLoaderUtils.hasExternalDependencies(clsName, getParent()); } /** @@ -504,446 +360,4 @@ public class HadoopClassLoader extends URLClassLoader implements ClassCache { public String name() { return name; } - - /** - * Context for dependencies collection. - */ - private class CollectingContext { - /** Visited classes. */ - private final Set<String> visited = new HashSet<>(); - - /** Whether dependency found. */ - private boolean found; - - /** Annotation visitor. */ - private AnnotationVisitor annVisitor; - - /** Method visitor. */ - private MethodVisitor mthdVisitor; - - /** Field visitor. */ - private FieldVisitor fldVisitor; - - /** Class visitor. */ - private ClassVisitor clsVisitor; - - /** - * Processes a method descriptor - * @param methDesc The method desc String. - */ - void onMethodsDesc(final String methDesc) { - // Process method return type: - onType(Type.getReturnType(methDesc)); - - if (found) - return; - - // Process method argument types: - for (Type t: Type.getArgumentTypes(methDesc)) { - onType(t); - - if (found) - return; - } - } - - /** - * Processes dependencies of a class. - * - * @param depCls The class name as dot-notated FQN. - */ - void onClass(final String depCls) { - assert depCls.indexOf('/') == -1 : depCls; // class name should be fully converted to dot notation. - assert depCls.charAt(0) != 'L' : depCls; - assert validateClassName(depCls) : depCls; - - if (depCls.startsWith("java.") || depCls.startsWith("javax.")) // Filter out platform classes. - return; - - if (visited.contains(depCls)) - return; - - Boolean res = cache.get(depCls); - - if (res == Boolean.TRUE || (res == null && hasExternalDependencies(depCls, this))) - found = true; - } - - /** - * Analyses dependencies of given type. - * - * @param t The type to process. - */ - void onType(Type t) { - if (t == null) - return; - - int sort = t.getSort(); - - switch (sort) { - case Type.ARRAY: - onType(t.getElementType()); - - break; - - case Type.OBJECT: - onClass(t.getClassName()); - - break; - } - } - - /** - * Analyses dependencies of given object type. - * - * @param objType The object type to process. - */ - void onInternalTypeName(String objType) { - if (objType == null) - return; - - assert objType.length() > 1 : objType; - - if (objType.charAt(0) == '[') - // handle array. In this case this is a type descriptor notation, like "[Ljava/lang/Object;" - onType(objType); - else { - assert objType.indexOf('.') == -1 : objType; // Must be slash-separated FQN. - - String clsName = objType.replace('/', '.'); // Convert it to dot notation. - - onClass(clsName); // Process. - } - } - - /** - * Type description analyser. - * - * @param desc The description. - */ - void onType(String desc) { - if (!F.isEmpty(desc)) { - if (desc.length() <= 1) - return; // Optimization: filter out primitive types in early stage. - - Type t = Type.getType(desc); - - onType(t); - } - } - } - - /** - * Annotation visitor. - */ - private static class CollectingAnnotationVisitor extends AnnotationVisitor { - /** */ - final CollectingContext ctx; - - /** - * Annotation visitor. - * - * @param ctx The collector. - */ - CollectingAnnotationVisitor(CollectingContext ctx) { - super(Opcodes.ASM4); - - this.ctx = ctx; - } - - /** {@inheritDoc} */ - @Override public AnnotationVisitor visitAnnotation(String name, String desc) { - if (ctx.found) - return null; - - ctx.onType(desc); - - return this; - } - - /** {@inheritDoc} */ - @Override public void visitEnum(String name, String desc, String val) { - if (ctx.found) - return; - - ctx.onType(desc); - } - - /** {@inheritDoc} */ - @Override public AnnotationVisitor visitArray(String name) { - return ctx.found ? null : this; - } - - /** {@inheritDoc} */ - @Override public void visit(String name, Object val) { - if (ctx.found) - return; - - if (val instanceof Type) - ctx.onType((Type)val); - } - - /** {@inheritDoc} */ - @Override public void visitEnd() { - // No-op. - } - } - - /** - * Field visitor. - */ - private static class CollectingFieldVisitor extends FieldVisitor { - /** Collector. */ - private final CollectingContext ctx; - - /** Annotation visitor. */ - private final AnnotationVisitor av; - - /** - * Constructor. - */ - CollectingFieldVisitor(CollectingContext ctx, AnnotationVisitor av) { - super(Opcodes.ASM4); - - this.ctx = ctx; - this.av = av; - } - - /** {@inheritDoc} */ - @Override public AnnotationVisitor visitAnnotation(String desc, boolean visible) { - if (ctx.found) - return null; - - ctx.onType(desc); - - return ctx.found ? null : av; - } - - /** {@inheritDoc} */ - @Override public void visitAttribute(Attribute attr) { - // No-op. - } - - /** {@inheritDoc} */ - @Override public void visitEnd() { - // No-op. - } - } - - /** - * Class visitor. - */ - private static class CollectingClassVisitor extends ClassVisitor { - /** Collector. */ - private final CollectingContext ctx; - - /** Annotation visitor. */ - private final AnnotationVisitor av; - - /** Method visitor. */ - private final MethodVisitor mv; - - /** Field visitor. */ - private final FieldVisitor fv; - - /** - * Constructor. - * - * @param ctx Collector. - * @param av Annotation visitor. - * @param mv Method visitor. - * @param fv Field visitor. - */ - CollectingClassVisitor(CollectingContext ctx, AnnotationVisitor av, MethodVisitor mv, FieldVisitor fv) { - super(Opcodes.ASM4); - - this.ctx = ctx; - this.av = av; - this.mv = mv; - this.fv = fv; - } - - /** {@inheritDoc} */ - @Override public void visit(int i, int i2, String name, String signature, String superName, String[] ifaces) { - if (ctx.found) - return; - - ctx.onInternalTypeName(superName); - - if (ctx.found) - return; - - if (ifaces != null) { - for (String iface : ifaces) { - ctx.onInternalTypeName(iface); - - if (ctx.found) - return; - } - } - } - - /** {@inheritDoc} */ - @Override public AnnotationVisitor visitAnnotation(String desc, boolean visible) { - if (ctx.found) - return null; - - ctx.onType(desc); - - return ctx.found ? null : av; - } - - /** {@inheritDoc} */ - @Override public void visitInnerClass(String name, String outerName, String innerName, int i) { - if (ctx.found) - return; - - ctx.onInternalTypeName(name); - } - - /** {@inheritDoc} */ - @Override public FieldVisitor visitField(int i, String name, String desc, String signature, Object val) { - if (ctx.found) - return null; - - ctx.onType(desc); - - return ctx.found ? null : fv; - } - - /** {@inheritDoc} */ - @Override public MethodVisitor visitMethod(int i, String name, String desc, String signature, - String[] exceptions) { - if (ctx.found) - return null; - - ctx.onMethodsDesc(desc); - - // Process declared method exceptions: - if (exceptions != null) { - for (String e : exceptions) - ctx.onInternalTypeName(e); - } - - return ctx.found ? null : mv; - } - } - - /** - * Method visitor. - */ - private static class CollectingMethodVisitor extends MethodVisitor { - /** Collector. */ - private final CollectingContext ctx; - - /** Annotation visitor. */ - private final AnnotationVisitor av; - - /** - * Constructor. - * - * @param ctx Collector. - * @param av Annotation visitor. - */ - private CollectingMethodVisitor(CollectingContext ctx, AnnotationVisitor av) { - super(Opcodes.ASM4); - - this.ctx = ctx; - this.av = av; - } - - /** {@inheritDoc} */ - @Override public AnnotationVisitor visitAnnotation(String desc, boolean visible) { - if (ctx.found) - return null; - - ctx.onType(desc); - - return ctx.found ? null : av; - } - - /** {@inheritDoc} */ - @Override public AnnotationVisitor visitParameterAnnotation(int i, String desc, boolean b) { - if (ctx.found) - return null; - - ctx.onType(desc); - - return ctx.found ? null : av; - } - - /** {@inheritDoc} */ - @Override public AnnotationVisitor visitAnnotationDefault() { - return ctx.found ? null : av; - } - - /** {@inheritDoc} */ - @Override public void visitFieldInsn(int opcode, String owner, String name, String desc) { - if (ctx.found) - return; - - ctx.onInternalTypeName(owner); - - if (ctx.found) - return; - - ctx.onType(desc); - } - - /** {@inheritDoc} */ - @Override public void visitInvokeDynamicInsn(String name, String desc, Handle bsm, Object... bsmArgs) { - // No-op. - } - - /** {@inheritDoc} */ - @Override public void visitFrame(int type, int nLoc, Object[] locTypes, int nStack, Object[] stackTypes) { - // No-op. - } - - /** {@inheritDoc} */ - @Override public void visitLocalVariable(String name, String desc, String signature, Label lb, - Label lb2, int i) { - if (ctx.found) - return; - - ctx.onType(desc); - } - - /** {@inheritDoc} */ - @Override public void visitMethodInsn(int i, String owner, String name, String desc) { - if (ctx.found) - return; - - ctx.onInternalTypeName(owner); - - if (ctx.found) - return; - - ctx.onMethodsDesc(desc); - } - - /** {@inheritDoc} */ - @Override public void visitMultiANewArrayInsn(String desc, int dim) { - if (ctx.found) - return; - - ctx.onType(desc); - } - - /** {@inheritDoc} */ - @Override public void visitTryCatchBlock(Label start, Label end, Label hndl, String typeStr) { - if (ctx.found) - return; - - ctx.onInternalTypeName(typeStr); - } - - /** {@inheritDoc} */ - @Override public void visitTypeInsn(int opcode, String type) { - if (ctx.found) - return; - - ctx.onInternalTypeName(type); - } - } } \ No newline at end of file http://git-wip-us.apache.org/repos/asf/ignite/blob/23e48072/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/HadoopClassLoaderUtils.java ---------------------------------------------------------------------- diff --git a/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/HadoopClassLoaderUtils.java b/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/HadoopClassLoaderUtils.java index 0762a91..3415d6a 100644 --- a/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/HadoopClassLoaderUtils.java +++ b/modules/hadoop/src/main/java/org/apache/ignite/internal/processors/hadoop/HadoopClassLoaderUtils.java @@ -17,19 +17,36 @@ package org.apache.ignite.internal.processors.hadoop; +import org.apache.ignite.internal.util.typedef.F; +import org.jetbrains.annotations.Nullable; +import org.jsr166.ConcurrentHashMap8; +import org.objectweb.asm.AnnotationVisitor; +import org.objectweb.asm.Attribute; import org.objectweb.asm.ClassReader; +import org.objectweb.asm.ClassVisitor; import org.objectweb.asm.ClassWriter; +import org.objectweb.asm.FieldVisitor; +import org.objectweb.asm.Handle; +import org.objectweb.asm.Label; +import org.objectweb.asm.MethodVisitor; import org.objectweb.asm.Opcodes; +import org.objectweb.asm.Type; import org.objectweb.asm.commons.Remapper; import org.objectweb.asm.commons.RemappingClassAdapter; import java.io.IOException; import java.io.InputStream; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; /** * Utility methods for Hadoop classloader required to avoid direct 3rd-party dependencies in class loader. */ public class HadoopClassLoaderUtils { + /** Cache for resolved dependency info. */ + private static final Map<String, Boolean> dependenciesCache = new ConcurrentHashMap8<>(); + /** * Load special replacement and impersonate * @@ -67,4 +84,601 @@ public class HadoopClassLoaderUtils { return w.toByteArray(); } + + /** + * @param cls Class name. + * @return {@code true} If this is Hadoop class. + */ + public static boolean isHadoop(String cls) { + return cls.startsWith("org.apache.hadoop."); + } + + /** + * Need to parse only Ignite Hadoop and IGFS classes. + * + * @param cls Class name. + * @return {@code true} if we need to check this class. + */ + public static boolean isHadoopIgfs(String cls) { + String ignitePkgPrefix = "org.apache.ignite"; + + int len = ignitePkgPrefix.length(); + + return cls.startsWith(ignitePkgPrefix) && ( + cls.indexOf("igfs.", len) != -1 || + cls.indexOf(".fs.", len) != -1 || + cls.indexOf("hadoop.", len) != -1); + } + + /** + * @param ldr Loader. + * @param clsName Class. + * @return Input stream. + */ + @Nullable public static InputStream loadClassBytes(ClassLoader ldr, String clsName) { + return ldr.getResourceAsStream(clsName.replace('.', '/') + ".class"); + } + + /** + * Check whether class has external dependencies on Hadoop. + * + * @param clsName Class name. + * @param parentClsLdr Parent class loader. + * @return {@code True} if class has external dependencies. + */ + static boolean hasExternalDependencies(String clsName, ClassLoader parentClsLdr) { + Boolean hasDeps = dependenciesCache.get(clsName); + + if (hasDeps == null) { + CollectingContext ctx = new CollectingContext(parentClsLdr); + + ctx.annVisitor = new CollectingAnnotationVisitor(ctx); + ctx.mthdVisitor = new CollectingMethodVisitor(ctx, ctx.annVisitor); + ctx.fldVisitor = new CollectingFieldVisitor(ctx, ctx.annVisitor); + ctx.clsVisitor = new CollectingClassVisitor(ctx, ctx.annVisitor, ctx.mthdVisitor, ctx.fldVisitor); + + hasDeps = hasExternalDependencies(clsName, parentClsLdr, ctx); + + dependenciesCache.put(clsName, hasDeps); + } + + return hasDeps; + } + + /** + * Check whether class has external dependencies on Hadoop. + * + * @param clsName Class name. + * @param parentClsLdr Parent class loader. + * @param ctx Context. + * @return {@code true} If the class has external dependencies. + */ + static boolean hasExternalDependencies(String clsName, ClassLoader parentClsLdr, CollectingContext ctx) { + if (isHadoop(clsName)) // Hadoop must not be in classpath but Idea sucks, so filtering explicitly as external. + return true; + + // Try to get from parent to check if the type accessible. + InputStream in = loadClassBytes(parentClsLdr, clsName); + + if (in == null) // The class is external itself, it must be loaded from this class loader. + return true; + + if (!isHadoopIgfs(clsName)) // Other classes should not have external dependencies. + return false; + + final ClassReader rdr; + + try { + rdr = new ClassReader(in); + } + catch (IOException e) { + throw new RuntimeException("Failed to read class: " + clsName, e); + } + + ctx.visited.add(clsName); + + rdr.accept(ctx.clsVisitor, 0); + + if (ctx.found) // We already know that we have dependencies, no need to check parent. + return true; + + // Here we are known to not have any dependencies but possibly we have a parent which has them. + int idx = clsName.lastIndexOf('$'); + + if (idx == -1) // No parent class. + return false; + + String parentCls = clsName.substring(0, idx); + + if (ctx.visited.contains(parentCls)) + return false; + + Boolean res = dependenciesCache.get(parentCls); + + if (res == null) + res = hasExternalDependencies(parentCls, parentClsLdr, ctx); + + return res; + } + + /** + * @param name Class name. + * @return {@code true} If this is a valid class name. + */ + private static boolean validateClassName(String name) { + int len = name.length(); + + if (len <= 1) + return false; + + if (!Character.isJavaIdentifierStart(name.charAt(0))) + return false; + + boolean hasDot = false; + + for (int i = 1; i < len; i++) { + char c = name.charAt(i); + + if (c == '.') + hasDot = true; + else if (!Character.isJavaIdentifierPart(c)) + return false; + } + + return hasDot; + } + + /** + * Context for dependencies collection. + */ + private static class CollectingContext { + /** Visited classes. */ + private final Set<String> visited = new HashSet<>(); + + /** Parent class loader. */ + private final ClassLoader parentClsLdr; + + /** Whether dependency found. */ + private boolean found; + + /** Annotation visitor. */ + private AnnotationVisitor annVisitor; + + /** Method visitor. */ + private MethodVisitor mthdVisitor; + + /** Field visitor. */ + private FieldVisitor fldVisitor; + + /** Class visitor. */ + private ClassVisitor clsVisitor; + + /** + * Constrcutor. + * + * @param parentClsLdr Parent class loader. + */ + private CollectingContext(ClassLoader parentClsLdr) { + this.parentClsLdr = parentClsLdr; + } + + /** + * Processes a method descriptor + * @param methDesc The method desc String. + */ + void onMethodsDesc(final String methDesc) { + // Process method return type: + onType(Type.getReturnType(methDesc)); + + if (found) + return; + + // Process method argument types: + for (Type t: Type.getArgumentTypes(methDesc)) { + onType(t); + + if (found) + return; + } + } + + /** + * Processes dependencies of a class. + * + * @param depCls The class name as dot-notated FQN. + */ + void onClass(final String depCls) { + assert depCls.indexOf('/') == -1 : depCls; // class name should be fully converted to dot notation. + assert depCls.charAt(0) != 'L' : depCls; + assert validateClassName(depCls) : depCls; + + if (depCls.startsWith("java.") || depCls.startsWith("javax.")) // Filter out platform classes. + return; + + if (visited.contains(depCls)) + return; + + Boolean res = dependenciesCache.get(depCls); + + if (res == Boolean.TRUE || (res == null && hasExternalDependencies(depCls, parentClsLdr, this))) + found = true; + } + + /** + * Analyses dependencies of given type. + * + * @param t The type to process. + */ + void onType(Type t) { + if (t == null) + return; + + int sort = t.getSort(); + + switch (sort) { + case Type.ARRAY: + onType(t.getElementType()); + + break; + + case Type.OBJECT: + onClass(t.getClassName()); + + break; + } + } + + /** + * Analyses dependencies of given object type. + * + * @param objType The object type to process. + */ + void onInternalTypeName(String objType) { + if (objType == null) + return; + + assert objType.length() > 1 : objType; + + if (objType.charAt(0) == '[') + // handle array. In this case this is a type descriptor notation, like "[Ljava/lang/Object;" + onType(objType); + else { + assert objType.indexOf('.') == -1 : objType; // Must be slash-separated FQN. + + String clsName = objType.replace('/', '.'); // Convert it to dot notation. + + onClass(clsName); // Process. + } + } + + /** + * Type description analyser. + * + * @param desc The description. + */ + void onType(String desc) { + if (!F.isEmpty(desc)) { + if (desc.length() <= 1) + return; // Optimization: filter out primitive types in early stage. + + Type t = Type.getType(desc); + + onType(t); + } + } + } + + /** + * Annotation visitor. + */ + private static class CollectingAnnotationVisitor extends AnnotationVisitor { + /** */ + final CollectingContext ctx; + + /** + * Annotation visitor. + * + * @param ctx The collector. + */ + CollectingAnnotationVisitor(CollectingContext ctx) { + super(Opcodes.ASM4); + + this.ctx = ctx; + } + + /** {@inheritDoc} */ + @Override public AnnotationVisitor visitAnnotation(String name, String desc) { + if (ctx.found) + return null; + + ctx.onType(desc); + + return this; + } + + /** {@inheritDoc} */ + @Override public void visitEnum(String name, String desc, String val) { + if (ctx.found) + return; + + ctx.onType(desc); + } + + /** {@inheritDoc} */ + @Override public AnnotationVisitor visitArray(String name) { + return ctx.found ? null : this; + } + + /** {@inheritDoc} */ + @Override public void visit(String name, Object val) { + if (ctx.found) + return; + + if (val instanceof Type) + ctx.onType((Type)val); + } + + /** {@inheritDoc} */ + @Override public void visitEnd() { + // No-op. + } + } + + /** + * Field visitor. + */ + private static class CollectingFieldVisitor extends FieldVisitor { + /** Collector. */ + private final CollectingContext ctx; + + /** Annotation visitor. */ + private final AnnotationVisitor av; + + /** + * Constructor. + */ + CollectingFieldVisitor(CollectingContext ctx, AnnotationVisitor av) { + super(Opcodes.ASM4); + + this.ctx = ctx; + this.av = av; + } + + /** {@inheritDoc} */ + @Override public AnnotationVisitor visitAnnotation(String desc, boolean visible) { + if (ctx.found) + return null; + + ctx.onType(desc); + + return ctx.found ? null : av; + } + + /** {@inheritDoc} */ + @Override public void visitAttribute(Attribute attr) { + // No-op. + } + + /** {@inheritDoc} */ + @Override public void visitEnd() { + // No-op. + } + } + + /** + * Class visitor. + */ + private static class CollectingClassVisitor extends ClassVisitor { + /** Collector. */ + private final CollectingContext ctx; + + /** Annotation visitor. */ + private final AnnotationVisitor av; + + /** Method visitor. */ + private final MethodVisitor mv; + + /** Field visitor. */ + private final FieldVisitor fv; + + /** + * Constructor. + * + * @param ctx Collector. + * @param av Annotation visitor. + * @param mv Method visitor. + * @param fv Field visitor. + */ + CollectingClassVisitor(CollectingContext ctx, AnnotationVisitor av, MethodVisitor mv, FieldVisitor fv) { + super(Opcodes.ASM4); + + this.ctx = ctx; + this.av = av; + this.mv = mv; + this.fv = fv; + } + + /** {@inheritDoc} */ + @Override public void visit(int i, int i2, String name, String signature, String superName, String[] ifaces) { + if (ctx.found) + return; + + ctx.onInternalTypeName(superName); + + if (ctx.found) + return; + + if (ifaces != null) { + for (String iface : ifaces) { + ctx.onInternalTypeName(iface); + + if (ctx.found) + return; + } + } + } + + /** {@inheritDoc} */ + @Override public AnnotationVisitor visitAnnotation(String desc, boolean visible) { + if (ctx.found) + return null; + + ctx.onType(desc); + + return ctx.found ? null : av; + } + + /** {@inheritDoc} */ + @Override public void visitInnerClass(String name, String outerName, String innerName, int i) { + if (ctx.found) + return; + + ctx.onInternalTypeName(name); + } + + /** {@inheritDoc} */ + @Override public FieldVisitor visitField(int i, String name, String desc, String signature, Object val) { + if (ctx.found) + return null; + + ctx.onType(desc); + + return ctx.found ? null : fv; + } + + /** {@inheritDoc} */ + @Override public MethodVisitor visitMethod(int i, String name, String desc, String signature, + String[] exceptions) { + if (ctx.found) + return null; + + ctx.onMethodsDesc(desc); + + // Process declared method exceptions: + if (exceptions != null) { + for (String e : exceptions) + ctx.onInternalTypeName(e); + } + + return ctx.found ? null : mv; + } + } + + /** + * Method visitor. + */ + private static class CollectingMethodVisitor extends MethodVisitor { + /** Collector. */ + private final CollectingContext ctx; + + /** Annotation visitor. */ + private final AnnotationVisitor av; + + /** + * Constructor. + * + * @param ctx Collector. + * @param av Annotation visitor. + */ + private CollectingMethodVisitor(CollectingContext ctx, AnnotationVisitor av) { + super(Opcodes.ASM4); + + this.ctx = ctx; + this.av = av; + } + + /** {@inheritDoc} */ + @Override public AnnotationVisitor visitAnnotation(String desc, boolean visible) { + if (ctx.found) + return null; + + ctx.onType(desc); + + return ctx.found ? null : av; + } + + /** {@inheritDoc} */ + @Override public AnnotationVisitor visitParameterAnnotation(int i, String desc, boolean b) { + if (ctx.found) + return null; + + ctx.onType(desc); + + return ctx.found ? null : av; + } + + /** {@inheritDoc} */ + @Override public AnnotationVisitor visitAnnotationDefault() { + return ctx.found ? null : av; + } + + /** {@inheritDoc} */ + @Override public void visitFieldInsn(int opcode, String owner, String name, String desc) { + if (ctx.found) + return; + + ctx.onInternalTypeName(owner); + + if (ctx.found) + return; + + ctx.onType(desc); + } + + /** {@inheritDoc} */ + @Override public void visitInvokeDynamicInsn(String name, String desc, Handle bsm, Object... bsmArgs) { + // No-op. + } + + /** {@inheritDoc} */ + @Override public void visitFrame(int type, int nLoc, Object[] locTypes, int nStack, Object[] stackTypes) { + // No-op. + } + + /** {@inheritDoc} */ + @Override public void visitLocalVariable(String name, String desc, String signature, Label lb, + Label lb2, int i) { + if (ctx.found) + return; + + ctx.onType(desc); + } + + /** {@inheritDoc} */ + @Override public void visitMethodInsn(int i, String owner, String name, String desc) { + if (ctx.found) + return; + + ctx.onInternalTypeName(owner); + + if (ctx.found) + return; + + ctx.onMethodsDesc(desc); + } + + /** {@inheritDoc} */ + @Override public void visitMultiANewArrayInsn(String desc, int dim) { + if (ctx.found) + return; + + ctx.onType(desc); + } + + /** {@inheritDoc} */ + @Override public void visitTryCatchBlock(Label start, Label end, Label hndl, String typeStr) { + if (ctx.found) + return; + + ctx.onInternalTypeName(typeStr); + } + + /** {@inheritDoc} */ + @Override public void visitTypeInsn(int opcode, String type) { + if (ctx.found) + return; + + ctx.onInternalTypeName(type); + } + } }
