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Diffstat (limited to 'src/jdk/nashorn/internal/runtime/linker/JavaArgumentConverters.java')
| -rw-r--r-- | src/jdk/nashorn/internal/runtime/linker/JavaArgumentConverters.java | 296 |
1 files changed, 0 insertions, 296 deletions
diff --git a/src/jdk/nashorn/internal/runtime/linker/JavaArgumentConverters.java b/src/jdk/nashorn/internal/runtime/linker/JavaArgumentConverters.java deleted file mode 100644 index e1656440..00000000 --- a/src/jdk/nashorn/internal/runtime/linker/JavaArgumentConverters.java +++ /dev/null @@ -1,296 +0,0 @@ -/* - * Copyright (c) 2010, 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. - */ - -package jdk.nashorn.internal.runtime.linker; - -import static jdk.nashorn.internal.lookup.Lookup.MH; -import static jdk.nashorn.internal.runtime.ECMAErrors.typeError; -import static jdk.nashorn.internal.runtime.JSType.isString; -import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED; - -import java.lang.invoke.MethodHandle; -import java.lang.invoke.MethodHandles; -import java.util.HashMap; -import java.util.Map; -import jdk.internal.dynalink.support.TypeUtilities; -import jdk.nashorn.internal.runtime.ConsString; -import jdk.nashorn.internal.runtime.JSType; -import jdk.nashorn.internal.runtime.ScriptObject; - -/** - * Utility class shared by {@code NashornLinker} and {@code NashornPrimitiveLinker} for converting JS values to Java - * types. - */ -final class JavaArgumentConverters { - - private static final MethodHandle TO_BOOLEAN = findOwnMH("toBoolean", Boolean.class, Object.class); - private static final MethodHandle TO_STRING = findOwnMH("toString", String.class, Object.class); - private static final MethodHandle TO_DOUBLE = findOwnMH("toDouble", Double.class, Object.class); - private static final MethodHandle TO_NUMBER = findOwnMH("toNumber", Number.class, Object.class); - private static final MethodHandle TO_LONG = findOwnMH("toLong", Long.class, Object.class); - private static final MethodHandle TO_LONG_PRIMITIVE = findOwnMH("toLongPrimitive", long.class, Object.class); - private static final MethodHandle TO_CHAR = findOwnMH("toChar", Character.class, Object.class); - private static final MethodHandle TO_CHAR_PRIMITIVE = findOwnMH("toCharPrimitive", char.class, Object.class); - - private JavaArgumentConverters() { - } - - static MethodHandle getConverter(final Class<?> targetType) { - return CONVERTERS.get(targetType); - } - - @SuppressWarnings("unused") - private static Boolean toBoolean(final Object obj) { - if (obj instanceof Boolean) { - return (Boolean) obj; - } - - if (obj == null) { - // NOTE: FindBugs complains here about the NP_BOOLEAN_RETURN_NULL pattern: we're returning null from a - // method that has a return type of Boolean, as it is worried about a NullPointerException if there's a - // conversion to a primitive boolean. We know what we're doing, though. We're using a separate method when - // we're converting Object to a primitive boolean - see how the CONVERTERS map is populated. We specifically - // want to have null and Undefined to be converted to a (Boolean)null when being passed to a Java method - // that expects a Boolean argument. - // TODO: if/when we're allowed to use FindBugs at build time, we can use annotations to disable this warning - return null; - } - - if (obj == UNDEFINED) { - // NOTE: same reasoning for FindBugs NP_BOOLEAN_RETURN_NULL warning as in the preceding comment. - return null; - } - - if (obj instanceof Number) { - final double num = ((Number) obj).doubleValue(); - return num != 0 && !Double.isNaN(num); - } - - if (isString(obj)) { - return ((CharSequence) obj).length() > 0; - } - - if (obj instanceof ScriptObject) { - return true; - } - - throw assertUnexpectedType(obj); - } - - private static Character toChar(final Object o) { - if (o == null) { - return null; - } - - if (o instanceof Number) { - final int ival = ((Number)o).intValue(); - if (ival >= Character.MIN_VALUE && ival <= Character.MAX_VALUE) { - return Character.valueOf((char) ival); - } - - throw typeError("cant.convert.number.to.char"); - } - - final String s = toString(o); - if (s == null) { - return null; - } - - if (s.length() != 1) { - throw typeError("cant.convert.string.to.char"); - } - - return s.charAt(0); - } - - static char toCharPrimitive(final Object obj0) { - final Character c = toChar(obj0); - return c == null ? (char)0 : c; - } - - // Almost identical to ScriptRuntime.toString, but returns null for null instead of the string "null". - static String toString(final Object obj) { - return obj == null ? null : JSType.toString(obj); - } - - @SuppressWarnings("unused") - private static Double toDouble(final Object obj0) { - // TODO - Order tests for performance. - for (Object obj = obj0; ;) { - if (obj == null) { - return null; - } else if (obj instanceof Double) { - return (Double) obj; - } else if (obj instanceof Number) { - return ((Number)obj).doubleValue(); - } else if (obj instanceof String) { - return JSType.toNumber((String) obj); - } else if (obj instanceof ConsString) { - return JSType.toNumber(obj.toString()); - } else if (obj instanceof Boolean) { - return (Boolean) obj ? 1 : +0.0; - } else if (obj instanceof ScriptObject) { - obj = JSType.toPrimitive(obj, Number.class); - continue; - } else if (obj == UNDEFINED) { - return Double.NaN; - } - throw assertUnexpectedType(obj); - } - } - - @SuppressWarnings("unused") - private static Number toNumber(final Object obj0) { - // TODO - Order tests for performance. - for (Object obj = obj0; ;) { - if (obj == null) { - return null; - } else if (obj instanceof Number) { - return (Number) obj; - } else if (obj instanceof String) { - return JSType.toNumber((String) obj); - } else if (obj instanceof ConsString) { - return JSType.toNumber(obj.toString()); - } else if (obj instanceof Boolean) { - return (Boolean) obj ? 1 : +0.0; - } else if (obj instanceof ScriptObject) { - obj = JSType.toPrimitive(obj, Number.class); - continue; - } else if (obj == UNDEFINED) { - return Double.NaN; - } - throw assertUnexpectedType(obj); - } - } - - private static Long toLong(final Object obj0) { - // TODO - Order tests for performance. - for (Object obj = obj0; ;) { - if (obj == null) { - return null; - } else if (obj instanceof Long) { - return (Long) obj; - } else if (obj instanceof Integer) { - return ((Integer)obj).longValue(); - } else if (obj instanceof Double) { - final Double d = (Double)obj; - if(Double.isInfinite(d.doubleValue())) { - return 0L; - } - return d.longValue(); - } else if (obj instanceof Float) { - final Float f = (Float)obj; - if(Float.isInfinite(f.floatValue())) { - return 0L; - } - return f.longValue(); - } else if (obj instanceof Number) { - return ((Number)obj).longValue(); - } else if (isString(obj)) { - return JSType.toLong(obj); - } else if (obj instanceof Boolean) { - return (Boolean)obj ? 1L : 0L; - } else if (obj instanceof ScriptObject) { - obj = JSType.toPrimitive(obj, Number.class); - continue; - } else if (obj == UNDEFINED) { - return null; // null or 0L? - } - throw assertUnexpectedType(obj); - } - } - - private static AssertionError assertUnexpectedType(final Object obj) { - return new AssertionError("Unexpected type" + obj.getClass().getName() + ". Guards should have prevented this"); - } - - @SuppressWarnings("unused") - private static long toLongPrimitive(final Object obj0) { - final Long l = toLong(obj0); - return l == null ? 0L : l; - } - - private static MethodHandle findOwnMH(final String name, final Class<?> rtype, final Class<?>... types) { - return MH.findStatic(MethodHandles.lookup(), JavaArgumentConverters.class, name, MH.type(rtype, types)); - } - - private static final Map<Class<?>, MethodHandle> CONVERTERS = new HashMap<>(); - - static { - CONVERTERS.put(Number.class, TO_NUMBER); - CONVERTERS.put(String.class, TO_STRING); - - CONVERTERS.put(boolean.class, JSType.TO_BOOLEAN.methodHandle()); - CONVERTERS.put(Boolean.class, TO_BOOLEAN); - - CONVERTERS.put(char.class, TO_CHAR_PRIMITIVE); - CONVERTERS.put(Character.class, TO_CHAR); - - CONVERTERS.put(double.class, JSType.TO_NUMBER.methodHandle()); - CONVERTERS.put(Double.class, TO_DOUBLE); - - CONVERTERS.put(long.class, TO_LONG_PRIMITIVE); - CONVERTERS.put(Long.class, TO_LONG); - - putLongConverter(Byte.class); - putLongConverter(Short.class); - putLongConverter(Integer.class); - putDoubleConverter(Float.class); - - } - - private static void putDoubleConverter(final Class<?> targetType) { - final Class<?> primitive = TypeUtilities.getPrimitiveType(targetType); - CONVERTERS.put(primitive, MH.explicitCastArguments(JSType.TO_NUMBER.methodHandle(), JSType.TO_NUMBER.methodHandle().type().changeReturnType(primitive))); - CONVERTERS.put(targetType, MH.filterReturnValue(TO_DOUBLE, findOwnMH(primitive.getName() + "Value", targetType, Double.class))); - } - - private static void putLongConverter(final Class<?> targetType) { - final Class<?> primitive = TypeUtilities.getPrimitiveType(targetType); - CONVERTERS.put(primitive, MH.explicitCastArguments(TO_LONG_PRIMITIVE, TO_LONG_PRIMITIVE.type().changeReturnType(primitive))); - CONVERTERS.put(targetType, MH.filterReturnValue(TO_LONG, findOwnMH(primitive.getName() + "Value", targetType, Long.class))); - } - - @SuppressWarnings("unused") - private static Byte byteValue(final Long l) { - return l == null ? null : l.byteValue(); - } - - @SuppressWarnings("unused") - private static Short shortValue(final Long l) { - return l == null ? null : l.shortValue(); - } - - @SuppressWarnings("unused") - private static Integer intValue(final Long l) { - return l == null ? null : l.intValue(); - } - - @SuppressWarnings("unused") - private static Float floatValue(final Double d) { - return d == null ? null : d.floatValue(); - } - -} |