com.modelsolv.kaboom.model.resource.nativeImpl.ObjectResourceDefinitionImpl.java Source code

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Here is the source code for com.modelsolv.kaboom.model.resource.nativeImpl.ObjectResourceDefinitionImpl.java

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/*******************************************************************************
 * Copyright (c) 2014 ModelSolv, Inc. and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     ModelSolv, Inc. - initial API and implementation.
 *******************************************************************************/
package com.modelsolv.kaboom.model.resource.nativeImpl;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.beanutils.PropertyUtils;

import com.modelsolv.kaboom.model.canonical.CDMProperty;
import com.modelsolv.kaboom.model.resource.ObjectResource;
import com.modelsolv.kaboom.model.resource.ObjectResourceDefinition;
import com.modelsolv.kaboom.model.resource.RDMFactory;
import com.modelsolv.kaboom.model.resource.ResourceDataModel;
import com.modelsolv.kaboom.object.CanonicalObjectReader;

public class ObjectResourceDefinitionImpl implements ObjectResourceDefinition {

    private ResourceDataModel resourceDataModel;
    private String name;
    private String uriTemplate;
    private Map<String, CDMProperty> parameterBindings = new HashMap<String, CDMProperty>();

    public ObjectResourceDefinitionImpl(String uriTemplate, ResourceDataModel rdm) {
        this.resourceDataModel = rdm;
        this.uriTemplate = uriTemplate;
    }

    @Override
    public ResourceDataModel getResourceDataModel() {
        return resourceDataModel;
    }

    @Override
    public String getURITemplate() {
        return uriTemplate;
    }

    @Override
    public String getName() {
        return this.name;
    }

    @Override
    public void setName(String name) {
        this.name = name;
    }

    @Override
    public ObjectResourceDefinition withName(String name) {
        setName(name);
        return this;
    }

    @Override
    public void bindTemplateParameter(String parameter, CDMProperty property) {
        if (!resourceDataModel.getCanonicalDataType().hasProperty(property)) {
            throw new IllegalArgumentException("Parameter must be bound to a property of the canonical data type.");
        }
        parameterBindings.put(parameter, property);
    }

    @Override
    public ObjectResourceDefinition withTemplateParameter(String parameter, CDMProperty property) {
        bindTemplateParameter(parameter, property);
        return this;
    }

    @Override
    public ObjectResource getResource(Object canonicalObject, CanonicalObjectReader reader) {
        URI uri = bindParameters(canonicalObject, reader);
        return RDMFactory.INSTANCE.createObjectResource(canonicalObject, uri, this);
    }

    private URI bindParameters(Object canonicalObject, CanonicalObjectReader reader) {

        Pattern pattern = Pattern.compile("\\{(.+?)\\}");
        Matcher matcher = pattern.matcher(getURITemplate());
        StringBuffer buffer = new StringBuffer();
        while (matcher.find()) {
            String param = matcher.group(1);
            CDMProperty boundProperty = parameterBindings.get(param);
            if (boundProperty == null) {
                throw new RuntimeException("Could not find a binding for the parameter " + param);
            }
            String replacement = (String) reader.getPropertyValue(canonicalObject, boundProperty.getName());
            matcher.appendReplacement(buffer, "");
            buffer.append(replacement);
        }
        matcher.appendTail(buffer);
        try {
            return new URI(buffer.toString());
        } catch (Exception e) {
            throw new RuntimeException("Could not create resource URI using the provided URI template, "
                    + "canonical object and reader.", e);
        }
    }
}