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package org.frameworkset.web.util;

import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Collections;
import java.util.List;

import org.frameworkset.util.LinkedMultiValueMap;
import org.frameworkset.util.MultiValueMap;
import org.frameworkset.util.ObjectUtils;

public class OpaqueUriComponents  extends UriComponents {

	private static final MultiValueMap QUERY_PARAMS_NONE = new LinkedMultiValueMap(0);

	private final String ssp;


	OpaqueUriComponents(String scheme, String schemeSpecificPart, String fragment) {
		super(scheme, fragment);
		this.ssp = schemeSpecificPart;
	}


	@Override
	public String getSchemeSpecificPart() {
		return this.ssp;
	}

	@Override
	public String getUserInfo() {
		return null;
	}

	@Override
	public String getHost() {
		return null;
	}

	@Override
	public int getPort() {
		return -1;
	}

	@Override
	public String getPath() {
		return null;
	}

	@Override
	public List getPathSegments() {
		return Collections.emptyList();
	}

	@Override
	public String getQuery() {
		return null;
	}

	@Override
	public MultiValueMap getQueryParams() {
		return QUERY_PARAMS_NONE;
	}

	@Override
	public UriComponents encode(String encoding) throws UnsupportedEncodingException {
		return this;
	}

	@Override
	protected UriComponents expandInternal(UriTemplateVariables uriVariables) {
		String expandedScheme = expandUriComponent(getScheme(), uriVariables);
		String expandedSsp = expandUriComponent(getSchemeSpecificPart(), uriVariables);
		String expandedFragment = expandUriComponent(getFragment(), uriVariables);
		return new OpaqueUriComponents(expandedScheme, expandedSsp, expandedFragment);
	}

	@Override
	public UriComponents normalize() {
		return this;
	}

	@Override
	public String toUriString() {
		StringBuilder uriBuilder = new StringBuilder();

		if (getScheme() != null) {
			uriBuilder.append(getScheme());
			uriBuilder.append(':');
		}
		if (this.ssp != null) {
			uriBuilder.append(this.ssp);
		}
		if (getFragment() != null) {
			uriBuilder.append('#');
			uriBuilder.append(getFragment());
		}

		return uriBuilder.toString();
	}

	@Override
	public URI toUri() {
		try {
			return new URI(getScheme(), this.ssp, getFragment());
		}
		catch (URISyntaxException ex) {
			throw new IllegalStateException("Could not create URI object: " + ex.getMessage(), ex);
		}
	}

	@Override
	protected void copyToUriComponentsBuilder(UriComponentsBuilder builder) {
		builder.scheme(getScheme());
		builder.schemeSpecificPart(getSchemeSpecificPart());
		builder.fragment(getFragment());
	}


	@Override
	public boolean equals(Object obj) {
		if (this == obj) {
			return true;
		}
		if (!(obj instanceof OpaqueUriComponents)) {
			return false;
		}

		OpaqueUriComponents other = (OpaqueUriComponents) obj;
		return ObjectUtils.nullSafeEquals(getScheme(), other.getScheme()) &&
				ObjectUtils.nullSafeEquals(this.ssp, other.ssp) &&
				ObjectUtils.nullSafeEquals(getFragment(), other.getFragment());

	}

	@Override
	public int hashCode() {
		int result = ObjectUtils.nullSafeHashCode(getScheme());
		result = 31 * result + ObjectUtils.nullSafeHashCode(this.ssp);
		result = 31 * result + ObjectUtils.nullSafeHashCode(getFragment());
		return result;
	}

}