| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.sshd.common; |
| |
| import java.util.Map; |
| import java.util.Objects; |
| |
| import org.apache.sshd.common.util.GenericUtils; |
| import org.apache.sshd.common.util.ValidateUtils; |
| |
| /** |
| * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a> |
| */ |
| public final class PropertyResolverUtils { |
| private PropertyResolverUtils() { |
| throw new UnsupportedOperationException("No instance allowed"); |
| } |
| |
| /** |
| * @param resolver The {@link PropertyResolver} instance - ignored if {@code null} |
| * @param name The property name |
| * @param defaultValue The default value to return if the specified property |
| * does not exist in the properties map |
| * @return The resolved property |
| * @throws NumberFormatException if malformed value |
| * @see #toLong(Object, long) |
| */ |
| public static long getLongProperty(PropertyResolver resolver, String name, long defaultValue) { |
| return toLong(resolvePropertyValue(resolver, name), defaultValue); |
| } |
| |
| public static long getLongProperty(Map<String, ?> props, String name, long defaultValue) { |
| return toLong(resolvePropertyValue(props, name), defaultValue); |
| } |
| |
| /** |
| * Converts a generic object value to a {@code long} if possible: |
| * <UL> |
| * <LI> |
| * If value is {@code null} the default is returned |
| * </LI> |
| * |
| * <LI> |
| * If value is a {@link Number} then its {@link Number#longValue()} is returned |
| * </LI> |
| * |
| * <LI> |
| * Otherwise, the value's {@link #toString()} is parsed as a {@code long} |
| * </LI> |
| * </UL> |
| * |
| * @param value The resolved value - may be {@code null} |
| * @param defaultValue The default to use if {@code null} resolved value |
| * @return The resolved value |
| * @throws NumberFormatException if malformed value |
| * @see Long#parseLong(String) |
| */ |
| public static long toLong(Object value, long defaultValue) { |
| if (value == null) { |
| return defaultValue; |
| } else if (value instanceof Number) { |
| return ((Number) value).longValue(); |
| } else { // we parse the string in case it is not a valid long value |
| return Long.parseLong(value.toString()); |
| } |
| } |
| |
| /** |
| * @param resolver The {@link PropertyResolver} instance - ignored if {@code null} |
| * @param name The property name |
| * @return The {@link Long} value or {@code null} if property not found |
| * @throws NumberFormatException if malformed value |
| * @see #toLong(Object) |
| */ |
| public static Long getLong(PropertyResolver resolver, String name) { |
| return toLong(resolvePropertyValue(resolver, name)); |
| } |
| |
| public static Long getLong(Map<String, ?> props, String name) { |
| return toLong(resolvePropertyValue(props, name)); |
| } |
| |
| /** |
| * Converts a generic object into a {@link Long}: |
| * <UL> |
| * <LI> |
| * If the value is {@code null} then returns {@code null}. |
| * </LI> |
| * |
| * <LI> |
| * If the value is already a {@link Long} then it is returned as such. |
| * </LI> |
| |
| * <LI> |
| * If value is a {@link Number} then its {@link Number#longValue()} is |
| * wrapped as a {@link Long} |
| * </LI> |
| * |
| * <LI> |
| * Otherwise, the value's {@link #toString()} is parsed as a {@link Long} |
| * </LI> |
| * </UL> |
| * |
| * @param value The resolved value - may be {@code null} |
| * @return The {@link Long} value or {@code null} if property not found |
| * @throws NumberFormatException if malformed value |
| * @see Long#valueOf(long) |
| * @see Long#valueOf(String) |
| */ |
| public static Long toLong(Object value) { |
| if (value == null) { |
| return null; |
| } else if (value instanceof Long) { |
| return (Long) value; |
| } else if (value instanceof Number) { |
| return Long.valueOf(((Number) value).longValue()); |
| } else { // we parse the string in case it is not a valid long value |
| return Long.valueOf(value.toString()); |
| } |
| } |
| |
| public static Object updateProperty(PropertyResolver resolver, String name, long value) { |
| return updateProperty(resolver.getProperties(), name, value); |
| } |
| |
| public static Object updateProperty(Map<String, Object> props, String name, long value) { |
| return updateProperty(props, name, Long.valueOf(value)); |
| } |
| |
| public static int getIntProperty(PropertyResolver resolver, String name, int defaultValue) { |
| return toInteger(resolvePropertyValue(resolver, name), defaultValue); |
| } |
| |
| public static int getIntProperty(Map<String, ?> props, String name, int defaultValue) { |
| return toInteger(resolvePropertyValue(props, name), defaultValue); |
| } |
| |
| public static int toInteger(Object value, int defaultValue) { |
| if (value == null) { |
| return defaultValue; |
| } else if (value instanceof Number) { |
| return ((Number) value).intValue(); |
| } else { // we parse the string in case this is NOT an integer |
| return Integer.parseInt(value.toString()); |
| } |
| } |
| |
| public static Integer getInteger(PropertyResolver resolver, String name) { |
| return toInteger(resolvePropertyValue(resolver, name)); |
| } |
| |
| public static Integer getInteger(Map<String, ?> props, String name) { |
| return toInteger(resolvePropertyValue(props, name)); |
| } |
| |
| public static Integer toInteger(Object value) { |
| if (value == null) { |
| return null; |
| } else if (value instanceof Integer) { |
| return (Integer) value; |
| } else if (value instanceof Number) { |
| return Integer.valueOf(((Number) value).intValue()); |
| } else { // we parse the string in case this is NOT an integer |
| return Integer.valueOf(value.toString()); |
| } |
| } |
| |
| public static Object updateProperty(PropertyResolver resolver, String name, int value) { |
| return updateProperty(resolver.getProperties(), name, value); |
| } |
| |
| public static Object updateProperty(Map<String, Object> props, String name, int value) { |
| return updateProperty(props, name, Integer.valueOf(value)); |
| } |
| |
| public static boolean getBooleanProperty(PropertyResolver resolver, String name, boolean defaultValue) { |
| return toBoolean(getObject(resolver, name), defaultValue); |
| } |
| |
| public static boolean getBooleanProperty(Map<String, ?> props, String name, boolean defaultValue) { |
| return toBoolean(getObject(props, name), defaultValue); |
| } |
| |
| public static boolean toBoolean(Object value, boolean defaultValue) { |
| if (value == null) { |
| return defaultValue; |
| } else { |
| return toBoolean(value).booleanValue(); |
| } |
| } |
| |
| public static Boolean getBoolean(PropertyResolver resolver, String name) { |
| return toBoolean(resolvePropertyValue(resolver, name)); |
| } |
| |
| public static Boolean getBoolean(Map<String, ?> props, String name) { |
| return toBoolean(resolvePropertyValue(props, name)); |
| } |
| |
| public static Boolean toBoolean(Object value) { |
| if (value == null) { |
| return null; |
| } else if (value instanceof Boolean) { |
| return (Boolean) value; |
| } else { |
| return Boolean.valueOf(value.toString()); |
| } |
| } |
| |
| public static Object updateProperty(PropertyResolver resolver, String name, boolean value) { |
| return updateProperty(resolver.getProperties(), name, value); |
| } |
| |
| public static Object updateProperty(Map<String, Object> props, String name, boolean value) { |
| return updateProperty(props, name, Boolean.valueOf(value)); |
| } |
| |
| /** |
| * @param resolver The {@link PropertyResolver} to use - ignored if {@code null} |
| * @param name The property name |
| * @param defaultValue The default value to return if property not set or empty |
| * @return The set value (if not {@code null}/empty) or default one |
| */ |
| public static String getStringProperty(PropertyResolver resolver, String name, String defaultValue) { |
| String value = getString(resolver, name); |
| if (GenericUtils.isEmpty(value)) { |
| return defaultValue; |
| } else { |
| return value; |
| } |
| } |
| public static String getStringProperty(Map<String, ?> props, String name, String defaultValue) { |
| Object value = resolvePropertyValue(props, name); |
| if (value == null) { |
| return defaultValue; |
| } else { |
| return Objects.toString(value); |
| } |
| } |
| |
| public static String getString(PropertyResolver resolver, String name) { |
| Object value = getObject(resolver, name); |
| return Objects.toString(value, null); |
| } |
| |
| public static String getString(Map<String, ?> props, String name) { |
| Object value = getObject(props, name); |
| return Objects.toString(value, null); |
| } |
| |
| public static Object getObject(PropertyResolver resolver, String name) { |
| return resolvePropertyValue(resolver, name); |
| } |
| |
| |
| // for symmetrical reasons... |
| public static Object getObject(Map<String, ?> props, String name) { |
| return resolvePropertyValue(props, name); |
| } |
| |
| public static Object resolvePropertyValue(Map<String, ?> props, String name) { |
| String key = ValidateUtils.checkNotNullAndNotEmpty(name, "No property name"); |
| return GenericUtils.isEmpty(props) ? null : props.get(key); |
| } |
| |
| /** |
| * @param resolver The {@link PropertyResolver} instance |
| * @param name The property name |
| * @param value The new value - if {@code null} or an empty {@link CharSequence} |
| * the property is <U>removed</U> |
| * @return The previous value - {@code null} if none |
| */ |
| public static Object updateProperty(PropertyResolver resolver, String name, Object value) { |
| return updateProperty(resolver.getProperties(), name, value); |
| } |
| |
| public static Object updateProperty(Map<String, Object> props, String name, Object value) { |
| String key = ValidateUtils.checkNotNullAndNotEmpty(name, "No property name"); |
| if ((value == null) || ((value instanceof CharSequence) && GenericUtils.isEmpty((CharSequence) value))) { |
| return props.remove(key); |
| } else { |
| return props.put(key, value); |
| } |
| } |
| |
| /** |
| * Unwinds the resolvers hierarchy until found one with a non-{@code null} value |
| * for the requested property or reached top. |
| * |
| * @param resolver The {@link PropertyResolver} to start from - ignored if {@code null} |
| * @param name The requested property name |
| * @return The found value or {@code null} |
| */ |
| public static Object resolvePropertyValue(PropertyResolver resolver, String name) { |
| String key = ValidateUtils.checkNotNullAndNotEmpty(name, "No property name"); |
| for (PropertyResolver r = resolver; r != null; r = r.getParentPropertyResolver()) { |
| Map<String, ?> props = r.getProperties(); |
| Object value = GenericUtils.isEmpty(props) ? null : props.get(key); |
| if (value != null) { |
| return value; |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Unwinds the resolvers hierarchy until found one with a non-{@code null} value |
| * for the requested property or reached top. |
| * |
| * @param resolver The {@link PropertyResolver} to start from - ignored if {@code null} |
| * @param name The requested property name |
| * @return The found properties {@link Map} or {@code null} |
| */ |
| public static Map<String, Object> resolvePropertiesSource(PropertyResolver resolver, String name) { |
| String key = ValidateUtils.checkNotNullAndNotEmpty(name, "No property name"); |
| for (PropertyResolver r = resolver; r != null; r = r.getParentPropertyResolver()) { |
| Map<String, Object> props = r.getProperties(); |
| Object value = GenericUtils.isEmpty(props) ? null : props.get(key); |
| if (value != null) { |
| return props; |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Wraps a {@link Map} into a {@link PropertyResolver} so it can be used |
| * with these utilities |
| * |
| * @param props The properties map - may be {@code null}/empty if no properties |
| * are updated |
| * @return The resolver wrapper |
| */ |
| public static PropertyResolver toPropertyResolver(final Map<String, Object> props) { |
| return toPropertyResolver(props, null); |
| } |
| |
| public static PropertyResolver toPropertyResolver(final Map<String, Object> props, final PropertyResolver parent) { |
| return new PropertyResolver() { |
| @Override |
| public PropertyResolver getParentPropertyResolver() { |
| return parent; |
| } |
| |
| @Override |
| public Map<String, Object> getProperties() { |
| return props; |
| } |
| |
| @Override |
| public String toString() { |
| return Objects.toString(props); |
| } |
| }; |
| } |
| } |