com.b2international.commons.dynamic.AbstractDynamicMap.java Source code

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Here is the source code for com.b2international.commons.dynamic.AbstractDynamicMap.java

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/*
 * Copyright 2011-2015 B2i Healthcare Pte Ltd, http://b2i.sg
 * 
 * Licensed 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 com.b2international.commons.dynamic;

import java.util.Collection;
import java.util.List;
import java.util.Map;

import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.base.Objects;
import com.google.common.collect.Collections2;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;

public abstract class AbstractDynamicMap extends AbstractDynamicValue implements DynamicMap {

    protected static final Function<Object, DynamicValue> valueConverter = new Function<Object, DynamicValue>() {

        @Override
        public DynamicValue apply(Object input) {

            if (input instanceof DynamicValue) {
                return (DynamicValue) input;
            } else if (input instanceof List) {
                return new DynamicListImpl((List<?>) input);
            } else if (input instanceof Map) {
                return new DynamicMapImpl((Map<?, ?>) input);
            } else {
                return DynamicValueImpl.create(input);
            }
        }
    };

    public static final class EntryImpl implements DynamicMap.Entry {

        private final String propertyKey;
        private final DynamicValue value;

        public EntryImpl(String key, DynamicValue value) {
            this.propertyKey = key;
            this.value = value;
        }

        @Override
        public String getPropertyKey() {
            return propertyKey;
        }

        @Override
        public DynamicValue getValue() {
            return value;
        }

        @Override
        public boolean equals(Object o) {

            if (!(o instanceof EntryImpl)) {
                return false;
            }

            EntryImpl otherEntry = (EntryImpl) o;

            return Objects.equal(this.getPropertyKey(), otherEntry.getPropertyKey())
                    && Objects.equal(this.getValue(), otherEntry.getValue());
        }

        @Override
        public int hashCode() {
            return Objects.hashCode(propertyKey, value);
        }

        @Override
        public String toString() {
            return Objects.toStringHelper(this).add("propertyKey", propertyKey).add("value", value).toString();
        }
    }

    @Override
    public Object get() {
        return this;
    }

    @Override
    public DynamicValue get(String key) {
        return containsKey(key) ? get(key, null) : DynamicValue.MISSING;
    }

    @Override
    public DynamicValue getFirstPropertyValue(String property) {
        Entry firstEntry = Iterables.getFirst(getProperty(property), null);
        return (firstEntry == null) ? DynamicValue.MISSING : firstEntry.getValue();
    }

    @Override
    public DynamicValue getFirstPropertyValue(String property, Object defaultValue) {
        Entry firstEntry = Iterables.getFirst(getProperty(property), null);
        return (firstEntry == null) ? DynamicValueImpl.create(defaultValue) : firstEntry.getValue();
    }

    protected Collection<Entry> getPrefixedFollowers(DynamicMap map, final String prefix,
            Iterable<String> propertyParts) {
        return getPrefixedFollowers(map, prefix, Joiner.on('.').join(propertyParts));
    }

    protected Collection<Entry> getPrefixedFollowers(DynamicMap map, final String prefix, String property) {
        Collection<Entry> followingValues = map.getProperty(property);
        return ImmutableList.copyOf(Collections2.transform(followingValues, new Function<Entry, Entry>() {
            @Override
            public Entry apply(Entry input) {
                return new EntryImpl(prefix + "." + input.getPropertyKey(), input.getValue());
            }
        }));
    }
}