001/*
002 * (C) Copyright 2006-2012 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Bogdan Stefanescu
018 *     Florent Guillaume
019 *     Nicolas Chapurlat <nchapurlat@nuxeo.com>
020 */
021package org.nuxeo.ecm.core.schema.types.primitives;
022
023import java.io.ByteArrayInputStream;
024import java.io.IOException;
025import java.io.InputStream;
026
027import org.apache.commons.lang.StringUtils;
028import org.apache.commons.logging.Log;
029import org.apache.commons.logging.LogFactory;
030import org.nuxeo.common.utils.FileUtils;
031import org.nuxeo.ecm.core.schema.types.PrimitiveType;
032import org.nuxeo.ecm.core.schema.types.constraints.Constraint;
033import org.nuxeo.ecm.core.schema.types.constraints.NotNullConstraint;
034
035/**
036 * The binary type handles values of type InputStream.
037 */
038public final class BinaryType extends PrimitiveType {
039
040    private static final long serialVersionUID = 1L;
041
042    private static final Log log = LogFactory.getLog(BinaryType.class);
043
044    public static final String ID = "binary";
045
046    public static final BinaryType INSTANCE = new BinaryType();
047
048    private BinaryType() {
049        super(ID);
050    }
051
052    @Override
053    public boolean validate(Object object) {
054        return true;
055    }
056
057    @Override
058    public Object convert(Object value) {
059        if (value instanceof CharSequence) {
060            return new ByteArrayInputStream(value.toString().getBytes());
061        } else if (value instanceof byte[]) {
062            return new ByteArrayInputStream((byte[]) value);
063        } else if (value instanceof InputStream) {
064            return value;
065        }
066        return null;
067    }
068
069    public static Object parseString(String str) {
070        return new ByteArrayInputStream(str.getBytes());
071    }
072
073    protected Object readResolve() {
074        return INSTANCE;
075    }
076
077    @Override
078    public Object decode(String str) {
079        if (StringUtils.isEmpty(str)) {
080            return null;
081        }
082        return new ByteArrayInputStream(str.getBytes());
083    }
084
085    @Override
086    public String encode(Object object) {
087        if (object instanceof InputStream) {
088            try {
089                return FileUtils.read((InputStream) object);
090            } catch (IOException e) {
091                log.error(e, e);
092                return null;
093            }
094        }
095        return object.toString();
096    }
097
098    @Override
099    public boolean support(Class<? extends Constraint> constraint) {
100        if (NotNullConstraint.class.equals(constraint)) {
101            return true;
102        }
103        return false;
104    }
105
106}