# StreamSourceDelegate.java

    /*
     * Copyright 2011, 2012 Odysseus Software GmbH
     *
     * 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 org.apache.synapse.commons.staxon.core.json.stream.util;

    import java.io.IOException;

    import org.apache.synapse.commons.staxon.core.json.stream.JsonStreamSource;
    import org.apache.synapse.commons.staxon.core.json.stream.JsonStreamTarget;
    import org.apache.synapse.commons.staxon.core.json.stream.JsonStreamToken;

    /**
     * Delegating stream source.
     */
    public class StreamSourceDelegate implements JsonStreamSource {
        /*
         * delegate source
         */
        private final JsonStreamSource delegate;

        public StreamSourceDelegate(JsonStreamSource delegate) {
            this.delegate = delegate;
        }

        @Override
        public void close() throws IOException {
            delegate.close();
        }

        @Override
        public int getLineNumber() {
            return delegate.getLineNumber();
        }

        @Override
        public int getColumnNumber() {
            return delegate.getColumnNumber();
        }

        @Override
        public String name() throws IOException {
            return delegate.name();
        }

        @Override
        public int getCharacterOffset() {
            return delegate.getCharacterOffset();
        }

        @Override
        public Value value() throws IOException {
            return delegate.value();
        }

        @Override
        public void startObject() throws IOException {
            delegate.startObject();
        }

        @Override
        public String getPublicId() {
            return delegate.getPublicId();
        }

        @Override
        public void endObject() throws IOException {
            delegate.endObject();
        }

        @Override
        public String getSystemId() {
            return delegate.getSystemId();
        }

        @Override
        public void startArray() throws IOException {
            delegate.startArray();
        }

        @Override
        public void endArray() throws IOException {
            delegate.endArray();
        }

        @Override
        public JsonStreamToken peek() throws IOException {
            return delegate.peek();
        }

        /**
         * Copy events to given target until <code>peek() == JsonStreamToken.NONE</code>.
         * This method does <em>not</em> close streams.
         *
         * @param target
         * @throws IOException
         */
        public void copy(JsonStreamTarget target) throws IOException {
            while (true) {
                switch (delegate.peek()) {
                    case START_OBJECT:
                        delegate.startObject();
                        target.startObject();
                        break;
                    case END_OBJECT:
                        delegate.endObject();
                        target.endObject();
                        break;
                    case START_ARRAY:
                        delegate.startArray();
                        target.startArray();
                        break;
                    case END_ARRAY:
                        delegate.endArray();
                        target.endArray();
                        break;
                    case NAME:
                        target.name(delegate.name());
                        break;
                    case VALUE:
                        target.value(delegate.value().data);
                        break;
                    case NONE:
                        return;
                }
            }
        }
    }