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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/lang/reflect/GenericSignatureParser.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/lang/reflect/GenericSignatureParser.java')
-rw-r--r-- | libjava/classpath/gnu/java/lang/reflect/GenericSignatureParser.java | 631 |
1 files changed, 631 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/lang/reflect/GenericSignatureParser.java b/libjava/classpath/gnu/java/lang/reflect/GenericSignatureParser.java new file mode 100644 index 000000000..e413c76c7 --- /dev/null +++ b/libjava/classpath/gnu/java/lang/reflect/GenericSignatureParser.java @@ -0,0 +1,631 @@ +/* GenericSignatureParser.java + Copyright (C) 2005 + Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.lang.reflect; + +import gnu.java.lang.CPStringBuilder; + +import java.lang.reflect.Constructor; +import java.lang.reflect.GenericArrayType; +import java.lang.reflect.GenericDeclaration; +import java.lang.reflect.GenericSignatureFormatError; +import java.lang.reflect.MalformedParameterizedTypeException; +import java.lang.reflect.Method; +import java.lang.reflect.ParameterizedType; +import java.lang.reflect.Type; +import java.lang.reflect.TypeVariable; +import java.lang.reflect.WildcardType; + +import java.util.ArrayList; +import java.util.Arrays; + +final class TypeVariableImpl extends TypeImpl implements TypeVariable +{ + private GenericDeclaration decl; + private Type[] bounds; + private String name; + + TypeVariableImpl(GenericDeclaration decl, Type[] bounds, String name) + { + this.decl = decl; + this.bounds = bounds; + this.name = name; + } + + Type resolve() + { + return this; + } + + public Type[] getBounds() + { + resolve(bounds); + return (Type[]) bounds.clone(); + } + + public GenericDeclaration getGenericDeclaration() + { + return decl; + } + + public String getName() + { + return name; + } + + public boolean equals(Object obj) + { + if (obj instanceof TypeVariableImpl) + { + TypeVariableImpl other = (TypeVariableImpl)obj; + return decl.equals(other.decl) && name.equals(other.name); + } + return false; + } + + public int hashCode() + { + return 0x5f4d5156 ^ decl.hashCode() ^ name.hashCode(); + } + + public String toString() + { + return name; + } +} + +final class ParameterizedTypeImpl extends TypeImpl implements ParameterizedType +{ + private String rawTypeName; + private ClassLoader loader; + private Class rawType; + private Type owner; + private Type[] typeArgs; + + ParameterizedTypeImpl(String rawTypeName, ClassLoader loader, Type owner, + Type[] typeArgs) + { + this.rawTypeName = rawTypeName; + this.loader = loader; + this.owner = owner; + this.typeArgs = typeArgs; + } + + Type resolve() + { + if (rawType == null) + { + try + { + rawType = Class.forName(rawTypeName, false, loader); + } + catch (ClassNotFoundException x) + { + throw new TypeNotPresentException(rawTypeName, x); + } + } + if (typeArgs == null) + { + if (owner == null) + { + return rawType; + } + typeArgs = new Type[0]; + } + resolve(typeArgs); + owner = resolve(owner); + return this; + } + + public Type[] getActualTypeArguments() + { + return (Type[]) typeArgs.clone(); + } + + public Type getRawType() + { + return rawType; + } + + public Type getOwnerType() + { + return owner; + } + + public boolean equals(Object obj) + { + if (obj instanceof ParameterizedTypeImpl) + { + ParameterizedTypeImpl other = (ParameterizedTypeImpl)obj; + return rawType.equals(other.rawType) + && ((owner == null && other.owner == null) + || owner.equals(other.owner)) + && Arrays.deepEquals(typeArgs, other.typeArgs); + } + return false; + } + + public int hashCode() + { + int h = 0x58158970 ^ rawType.hashCode(); + if (owner != null) + { + h ^= Integer.reverse(owner.hashCode()); + } + for (int i = 0; i < typeArgs.length; i++) + { + h ^= Integer.rotateLeft(typeArgs[i].hashCode(), i); + } + return h; + } + + public String toString() + { + CPStringBuilder sb = new CPStringBuilder(); + if (owner != null) + { + sb.append(owner); + sb.append('.'); + sb.append(rawType.getSimpleName()); + } + else + { + sb.append(rawTypeName); + } + if (typeArgs.length > 0) + { + sb.append('<'); + for (int i = 0; i < typeArgs.length; i++) + { + if (i > 0) + sb.append(", "); + if (typeArgs[i] instanceof Class) + { + sb.append(((Class)typeArgs[i]).getName()); + } + else + { + sb.append(typeArgs[i]); + } + } + sb.append('>'); + } + return sb.toString(); + } +} + +final class GenericArrayTypeImpl extends TypeImpl implements GenericArrayType +{ + private Type componentType; + + GenericArrayTypeImpl(Type componentType) + { + this.componentType = componentType; + } + + Type resolve() + { + componentType = resolve(componentType); + return this; + } + + public Type getGenericComponentType() + { + return componentType; + } + + public boolean equals(Object obj) + { + if (obj instanceof GenericArrayTypeImpl) + { + GenericArrayTypeImpl other = (GenericArrayTypeImpl)obj; + return componentType.equals(other.componentType); + } + return false; + } + + public int hashCode() + { + return 0x4be37a7f ^ componentType.hashCode(); + } + + public String toString() + { + return componentType + "[]"; + } +} + +final class UnresolvedTypeVariable extends TypeImpl implements Type +{ + private GenericDeclaration decl; + private String name; + + UnresolvedTypeVariable(GenericDeclaration decl, String name) + { + this.decl = decl; + this.name = name; + } + + Type resolve() + { + GenericDeclaration d = decl; + while (d != null) + { + for (TypeVariable t : d.getTypeParameters()) + { + if (t.getName().equals(name)) + { + return t; + } + } + d = getParent(d); + } + throw new MalformedParameterizedTypeException(); + } + + private static GenericDeclaration getParent(GenericDeclaration d) + { + if (d instanceof Class) + { + Method m = ((Class)d).getEnclosingMethod(); + if (m != null) + { + return m; + } + Constructor c = ((Class)d).getEnclosingConstructor(); + if (c != null) + { + return c; + } + return ((Class)d).getEnclosingClass(); + } + else if (d instanceof Method) + { + return ((Method)d).getDeclaringClass(); + } + else if (d instanceof Constructor) + { + return ((Constructor)d).getDeclaringClass(); + } + else + { + // TODO figure out what this represents + throw new Error(); + } + } +} + +final class WildcardTypeImpl extends TypeImpl implements WildcardType +{ + private Type lower; + private Type upper; + + WildcardTypeImpl(Type lower, Type upper) + { + this.lower = lower; + this.upper = upper; + } + + Type resolve() + { + upper = resolve(upper); + lower = resolve(lower); + return this; + } + + public Type[] getUpperBounds() + { + if (upper == null) + { + return new Type[0]; + } + return new Type[] { upper }; + } + + public Type[] getLowerBounds() + { + if (lower == null) + { + return new Type[0]; + } + return new Type[] { lower }; + } + + public boolean equals(Object obj) + { + if (obj instanceof WildcardTypeImpl) + { + WildcardTypeImpl other = (WildcardTypeImpl)obj; + return Arrays.deepEquals(getUpperBounds(), other.getUpperBounds()) + && Arrays.deepEquals(getLowerBounds(), other.getLowerBounds()); + } + return false; + } + + public int hashCode() + { + int h = 0x75d074fd; + if (upper != null) + { + h ^= upper.hashCode(); + } + if (lower != null) + { + h ^= lower.hashCode(); + } + return h; + } + + public String toString() + { + if (lower != null) + { + return "? super " + lower; + } + if (upper == java.lang.Object.class) + { + return "?"; + } + return "? extends " + upper; + } +} + +class GenericSignatureParser +{ + private ClassLoader loader; + private GenericDeclaration container; + private String signature; + private int pos; + + GenericSignatureParser(GenericDeclaration container, ClassLoader loader, + String signature) + { + this.container = container; + this.loader = loader; + this.signature = signature; + } + + TypeVariable[] readFormalTypeParameters() + { + consume('<'); + ArrayList<TypeVariable> params = new ArrayList<TypeVariable>(); + do + { + // TODO should we handle name clashes? + params.add(readFormalTypeParameter()); + } while (peekChar() != '>'); + consume('>'); + TypeVariable[] list = new TypeVariable[params.size()]; + params.toArray(list); + return list; + } + + private TypeVariable readFormalTypeParameter() + { + String identifier = readIdentifier(); + consume(':'); + ArrayList<Type> bounds = new ArrayList<Type>(); + if (peekChar() != ':') + { + bounds.add(readFieldTypeSignature()); + } + while (peekChar() == ':') + { + consume(':'); + bounds.add(readFieldTypeSignature()); + } + Type[] b = new Type[bounds.size()]; + bounds.toArray(b); + return new TypeVariableImpl(container, b, identifier); + } + + Type readFieldTypeSignature() + { + switch (peekChar()) + { + case 'L': + return readClassTypeSignature(); + case '[': + return readArrayTypeSignature(); + case 'T': + return readTypeVariableSignature(); + default: + throw new GenericSignatureFormatError(); + } + } + + Type readClassTypeSignature() + { + consume('L'); + String className = ""; + for (;;) + { + String part = readIdentifier(); + if (peekChar() != '/') + { + className += part; + break; + } + consume('/'); + className += part + "."; + } + Type[] typeArguments = null; + if (peekChar() == '<') + { + typeArguments = readTypeArguments(); + } + Type type = new ParameterizedTypeImpl(className, loader, null, + typeArguments); + while (peekChar() == '.') + { + consume('.'); + className += "$" + readIdentifier(); + typeArguments = null; + if (peekChar() == '<') + { + typeArguments = readTypeArguments(); + } + type = new ParameterizedTypeImpl(className, loader, type, + typeArguments); + } + consume(';'); + return type; + } + + private Type[] readTypeArguments() + { + consume('<'); + ArrayList<Type> list = new ArrayList<Type>(); + do + { + list.add(readTypeArgument()); + } while ((peekChar() != '>')); + consume('>'); + Type[] arr = new Type[list.size()]; + list.toArray(arr); + return arr; + } + + private Type readTypeArgument() + { + char c = peekChar(); + if (c == '+') + { + consume('+'); + return new WildcardTypeImpl(null, readFieldTypeSignature()); + } + else if (c == '-') + { + consume('-'); + return new WildcardTypeImpl(readFieldTypeSignature(), + java.lang.Object.class); + } + else if (c == '*') + { + consume('*'); + return new WildcardTypeImpl(null, java.lang.Object.class); + } + else + { + return readFieldTypeSignature(); + } + } + + Type readArrayTypeSignature() + { + consume('['); + switch (peekChar()) + { + case 'L': + case '[': + case 'T': + return new GenericArrayTypeImpl(readFieldTypeSignature()); + case 'Z': + consume('Z'); + return boolean[].class; + case 'B': + consume('B'); + return byte[].class; + case 'S': + consume('S'); + return short[].class; + case 'C': + consume('C'); + return char[].class; + case 'I': + consume('I'); + return int[].class; + case 'F': + consume('F'); + return float[].class; + case 'J': + consume('J'); + return long[].class; + case 'D': + consume('D'); + return double[].class; + default: + throw new GenericSignatureFormatError(); + } + } + + Type readTypeVariableSignature() + { + consume('T'); + String identifier = readIdentifier(); + consume(';'); + return new UnresolvedTypeVariable(container, identifier); + } + + private String readIdentifier() + { + int start = pos; + char c; + do + { + readChar(); + c = peekChar(); + } while (";:./<>-+*".indexOf(c) == -1); + return signature.substring(start, pos); + } + + final char peekChar() + { + if (pos == signature.length()) + return '\u0000'; + else + return signature.charAt(pos); + } + + final char readChar() + { + return signature.charAt(pos++); + } + + final void consume(char c) + { + if (readChar() != c) + throw new GenericSignatureFormatError(); + } + + final void end() + { + if (pos != signature.length()) + throw new GenericSignatureFormatError(); + } +} |